SA193 Grade B7 Stud Bolt, Hex Bolt, Threaded Bar, Threaded Rod
 Hex Head Bolts, Full Threaded Bolts, Stud Bolts, Foundation Bolts, Threaded Bars, Threaded Rods, Hex Nuts, Heavy Hex Nuts, Lock Nuts, Slotted Nuts, Self Locking Nuts, Punch Washers, Machine Washers, Taper Washers, Spring Washers
ASME SA193 Grade B7, Grade B7M, Grade B16, ASTM A193 Grade B7/B7M/B16
ASME SA320 Grade L7, Grade L7M, Grade L43, ASTM A320 Grade L7, L7M, L43
ASME SA194 Grade 2H, Grade 2HM, Grade 3, Grade 4, Grade 7, Grade 7M, Grade 16
ASTM A194 Grade 2H, 2HM, 3, 4, 7, 7M, 16
ASME SA193 Grade B8, Grade B8M, Grade B8 Class 2, Grade B8M Class 2
ASTM A193 Grade B8, B6M, B8 Class 2, B8M Class 2
ASME SA320 Grade B8, Grade B8M, Grade B8 Class 2, Grade B8M Class 2
ASTM A320 Grade B8, B8M, B8 Class 2, B8M Class 2
ASME SA307 Grade A, B, C Carbon Steel Bolt and Stud 60000 PSI Tensile Strength
ASTM A307 Grade A, B, C Carbon Steel Bolt and Stud 60,000 PSI Tensile Strength
ASME SA194 Grade 8, Grade 8M, Grade 8F, Grade 8A, Grade 8C, Grade 6, Grade 310
Stainless Steel Carbide Solution Treated & Strain Hardened Threaded Bar, Rod, Stud
B-8 Class-1 Stainless Steel AISI 304 / 304L Carbide Solution Treated
B-8 Class-2 Stainless Steel AISI 304 / 304L Carbide Solution Treated, Strain Hardened
B-8M Class-1 Stainless Steel AISI 316 / 316L Carbide Solution Treated
B-8M Class-2 Stainless Steel AISI 316 / 316L Carbide Solution Treated, Strain Hardened
B-8C Stainless Steel AISI 347 / 347H Carbide Solution Treated, Strain Hardened
B-8T Stainless Steel AISI 321 / 321H Carbide Solution Treated, Strain Hardened
B-8P Stainless Steel AISI 305 Carbide Solution Treated, Strain Hardened
Roll Threaded Bars, Roll Threaded Rods, Roll Threaded Studs
ASTM A194 Grade 8, 8M, 8F, 8A, 8C, 6, 310
Thread : Metric, BSW, BSF, UNC, UNF
Threaded Rod / Threaded Bar DIN 975, Stud Bolt DIN 976
Hexagon Bolt DIN 601, DIN 931, DIN 933, Hexagon Nut DIN 555, DIN 934
Plain Washer DIN 125, Stud Metal End DIN 938, DIN 939, DIN 940
Property Class : 4.8, 5.6, 5.8, 8.8, 10.9, 12.9
Coating : Bright Zinc Plated, Hot Dip Galvanised, Phosphatided, Nickel Plated
Material : 22CrMo4, 24CrMo4, 25CrMo4, 26CrMo4, 34CrMo4, 42CrMo4, 34CrNiMo6, 41CrNiMo6
Material : AISI 4130, SAE 4130, AISI 4140, SAE 4140, AISI 4145, SAE 4145, AISI 4340, SAE 4340
Material : EN 8, EN 9, EN 19, EN 24 Condition : Normalized, Tempered, Quenched & Tempered
ASTM Specifications SA193 Grade B16 Stud Bolt, Hex Bolt, Threaded Bar, Threaded Rod Hex Head Bolts, Full Threaded Bolts, Stud Bolts, Foundation Bolts, Threaded Bars, Threaded Rods, Hex Nuts, Heavy Hex Nuts, Lock Nuts, Slotted Nuts, Self Locking Nuts, Punch Washers, Machine Washers, Taper Washers, Spring Washers
ASME SA193 Grade B7, Grade B7M, Grade B16, ASTM A193 Grade B7/B7M/B16
ASME SA320 Grade L7, Grade L7M, Grade L43, ASTM A320 Grade L7, L7M, L43
ASME SA194 Grade 2H, Grade 2HM, Grade 3, Grade 4, Grade 7, Grade 7M, Grade 16
ASTM A194 Grade 2H, 2HM, 3, 4, 7, 7M, 16
ASME SA193 Grade B8, Grade B8M, Grade B8 Class 2, Grade B8M Class 2
ASTM A193 Grade B8, B6M, B8 Class 2, B8M Class 2
ASME SA320 Grade B8, Grade B8M, Grade B8 Class 2, Grade B8M Class 2
ASTM A320 Grade B8, B8M, B8 Class 2, B8M Class 2
ASME SA307 Grade A, B, C Carbon Steel Bolt and Stud 60000 PSI Tensile Strength
ASTM A307 Grade A, B, C Carbon Steel Bolt and Stud 60,000 PSI Tensile Strength
ASME SA194 Grade 8, Grade 8M, Grade 8F, Grade 8A, Grade 8C, Grade 6, Grade 310
Stainless Steel Carbide Solution Treated & Strain Hardened Threaded Bar, Rod, Stud
B-8 Class-1 Stainless Steel AISI 304 / 304L Carbide Solution Treated
B-8 Class-2 Stainless Steel AISI 304 / 304L Carbide Solution Treated, Strain Hardened
B-8M Class-1 Stainless Steel AISI 316 / 316L Carbide Solution Treated
B-8M Class-2 Stainless Steel AISI 316 / 316L Carbide Solution Treated, Strain Hardened
B-8C Stainless Steel AISI 347 / 347H Carbide Solution Treated, Strain Hardened
B-8T Stainless Steel AISI 321 / 321H Carbide Solution Treated, Strain Hardened
B-8P Stainless Steel AISI 305 Carbide Solution Treated, Strain Hardened
Roll Threaded Bars, Roll Threaded Rods, Roll Threaded Studs
ASTM A194 Grade 8, 8M, 8F, 8A, 8C, 6, 310
Thread : Metric, BSW, BSF, UNC, UNF
Threaded Rod / Threaded Bar DIN 975, Stud Bolt DIN 976
Hexagon Bolt DIN 601, DIN 931, DIN 933, Hexagon Nut DIN 555, DIN 934
Plain Washer DIN 125, Stud Metal End DIN 938, DIN 939, DIN 940
Property Class : 4.8, 5.6, 5.8, 8.8, 10.9, 12.9
Coating : Bright Zinc Plated, Hot Dip Galvanised, Phosphatided, Nickel Plated
Material : 22CrMo4, 24CrMo4, 25CrMo4, 26CrMo4, 34CrMo4, 42CrMo4, 34CrNiMo6, 41CrNiMo6
Material : AISI 4130, SAE 4130, AISI 4140, SAE 4140, AISI 4145, SAE 4145, AISI 4340, SAE 4340
Material : EN 8, EN 9, EN 19, EN 24 Condition : Normalized, Tempered, Quenched & Tempered ASTM Specifications • ASTM A153 Hot dip galvanizing specification • ASTM A193 Alloy steel & stainless steel bolting materials for high temp service • ASTM A194 Carbon & alloy nuts for bolts on high pressure & high temp service • ASTM A307 Carbon steel bolts & studs from 1/4” through 4” diameter • ASTM A320 Alloy steel & stainless steel bolting materials for low temp service • ASTM A325 Structural bolts, steel, heat treated, 120/105 ksi minimum tensile strength • ASTM A354 Quenched & tempered alloy bolts, studs and other externally threaded fasteners • ASTM A449 Quenched & tempered alloy bolts & studs • ASTM A490 Structural bolts, alloy steel, heat treated, 150 ksi tensile strength • ASTM A563 Standard specification for carbon & alloy steel nuts • ASTM F1554 Anchor bolts designed to anchor structural supports to concrete foundations • ASTM F2329 New specification covering hot dip galvanizing
| ASTM A153 | The ASTM A153 specification covers zinc coating (hot-dip) on iron and steel hardware. A newer and more appropriate specification developed in 2005 covering the requirement for hot-dip galvanizing of bolts, screws, nuts, washers and other threaded fasteners is ASTM F2329. It is not yet widely used since many of the ASTM specifications covering bolts, nuts and washers do not reference it. As soon as revisions referencing F2329 are made to these fastener specifications, F2329 will become more common. ASTM A123 is a related hot-dip galvanizing specification covering iron and steel products made from rolled pressed and forged shapes, castings, plates, bars, and strips. |
| ASTM A193 | This specification is heavily utilized in petroleum and chemical construction applications. The ASTM standard covers alloy steel and stainless steel bolting materials for high temperature service. This specification includes fasteners intended for use in pressure vessels, valves, flanges, and fittings. Although, this material is often available in national coarse (UNC) thread pitches, if being used in traditional applications, threads are specified 8 threads per inch (tpi) for diameters above one inch.Below is a basic summary of a few of the common grades. ASTM A193 covers a number of other standard specifications not covered in this description including B5, B6, and B16. GRADES
B7 | Alloy steel, AISI 4140/4142 quench & tempered | B8 | Class 1 Stainless steel, AISI 304, carbide solution treated | B8M | Class 1 Stainless steel, AISI 316, carbide solution treated | B8 | Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened | B8M | Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened |
MECHANICAL PROPORTIES
Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min | B7 | Up to 2-1/2 | 125 | 105 | 16 | 50 | 2-5/8 - 4 | 115 | 95 | 16 | 50 | 4-1/8 - 7 | 100 | 75 | 18 | 50 | B8 Class 1 | All | 75 | 30 | 30 | 50 | B8M Class 1 | All | 75 | 30 | 30 | 50 | B8 Class 2 | Up to 3/4 | 125 | 100 | 12 | 35 | 7/8 - 1 | 115 | 80 | 15 | 35 | 1-1/8 - 1-1/4 | 105 | 65 | 20 | 35 | 1-3/8 - 1-1/2 | 100 | 50 | 28 | 45 | B8M Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 | 7/8 - 1 | 100 | 80 | 20 | 45 | 1-1/8 - 1-1/4 | 95 | 65 | 25 | 45 | 1-3/8 - 1-1/2 | 90 | 50 | 30 | 45 |
RECOMMENDED NUTS and WASHERS
Grade Nuts | Washers | B7 A194 Grade 2H | F436 | B8 Class 1 A194 Grade 8 | SS304 | B8M Class 1 A194 Grade 8M | SS316 | B8 Class 2 A194 Grade 8, strain hardened | SS304 | B8M Class 2 A194 Grade 8M, strain hardened | SS316 |
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| ASTM A194 | The ASTM A194 specification covers carbon, alloy and stainless steel nuts intended for use in high-pressure and/or high-temperature service. Unless otherwise specified, the American National Standard Heavy Hex Series (ANSI B 18.2.2) shall be used. Nuts up to and including 1 inch nominal size shall be UNC Series Class 2B fit. Nuts over 1 inch nominal size shall be either UNC Series Class 2B fit or 8 UN Series Class 2B fit. High strength ASTM A194 grade 2H nuts are common in the marketplace and are often substituted for ASTM A563 grade DH nuts due to the limited availability of DH nuts in certain diameters and finishes. GRADES
2 | Carbon steel heavy hex nuts | 2H | Quenched & tempered carbon steel heavy hex nuts | 2HM | Quenched & tempered carbon steel heavy hex nuts | 4 | Quenched & tempered carbon-molybdenum heavy hex nuts | 7 | Quenched & tempered alloy steel heavy hex nuts | 7M | Quenched & tempered alloy steel heavy hex nuts | 8 | Stainless AISI 304 heavy hex nuts | 8M | Stainless AISI 316 heavy hex nuts |
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MECHANICAL PROPORTIES
Grade Identification Marking 5 | Specification | Material | Nominal Size, In. Tempering Temp. °F | Proof Load Stress, ksi | Hardness Rockwell | See Note | Min | Max |  ASTM A194 Grade 2Medium Carbon Steel1/4 - 41000150159
352 | 1,2,3 |  ASTM A194 Grade 2HMedium Carbon Steel, Quenched and Tempered1/4 - 41000175C24
C38 | 1,2 |  ASTM A194 Grade 2HMMedium Carbon Steel, Quenched and Tempered1/4 - 41000150159
237 | 1,2,3 |  ASTM A194 Grade 4Medium Carbon Alloy Steel, Quenched and Tempered1/4 - 41100175C24
C38 | 1,2 |  ASTM A194 Grade 7Medium Carbon Alloy Steel, Quenched and Tempered1/4 - 41100175C24
C38 | 1,2 |  ASTM A194 Grade 7MMedium Carbon Alloy Steel, Quenched and Tempered1/4 - 41100150159
237 | 1,2,3 |  ASTM A194 Grade 8Stainless AISI 3041/4 - 4-80126
300 | 4 |  ASTM A194 Grade 8MStainless AISI 3161/4 - 4-80126
300 | 4 |
NOTES• The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. When nuts are machined from bar stock, the nut must additionally be marked with the letter 'B'. The letters H and M indicate heat treated nuts.• Properties shown are those of coarse and 8-pitch thread heavy hex nuts.• Hardness numbers are Brinell Hardness.• Nuts that are carbide-solution treated require additional letter A - 8A or 8MA. • All nuts shall bear the manufacturer's identification mark. Nuts shall be legibly marked on one face to indicate the grade and process of the manufacturer. Marking of wrench flats or bearing surfaces is not permitted unless agreed upon between manufacturer and purchaser. Nuts coated with zinc have an asterisk (*) marked after the grade symbol. Nuts coated with cadmium shall have a plus sign (+) marked after the grade symbol.
| ASTM A307 | The ASTM A307 specification covers carbon steel bolts and studs ranging from 1/4” through 4” diameter. This is your everyday, run of the mill bolt specification often manufactured using A36 round bar. There are three grades A, B, and C* which denote tensile strength, configuration, and application. Refer to the Mechanical Properties Chart for the subtle strength differences within each grade. GRADES
A | Headed bolts, threaded rods and bent bolts intended for general applications. | B | Heavy hex bolts and studs intended for flanged joints in piping systems with cast iron flanges. | C | Anchor bolts, either bent or straight, intended for structural anchorage purposes. The end of a grade C anchor bolt intended to project from the concrete will be painted green for identification purposes. Permanent marking is a supplemental requirement. *As of August 2007, grade C has been replaced by specification F1554 grade 36 . Northstar will continue to supply grade C, if required by the project. |
MECHANICAL PROPORTIES
Grade Tensile, ksi Yield, min, ksi | Elong %, min | A60 min -- | 18 | B60 - 100 -- | 18 | C58 - 80 36 | 23 |
RECOMMENDED NUTS and WASHERS
Nuts | Washers | A307 Grades A & C | A307 Grade B | 1/4 – 1-1/2 1-5/8 - 4 | 1/4 -4 | A563A Hex | A563A Heavy Hex | F844 |
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| ASTM A320 | The ASTM A320 specification covers alloy steel and stainless steel bolting materials for low temperature service. This standard covers rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts used for pressure vessels, valves, flanges, and fittings. Like the ASTM A193 specification, unless otherwise specified, the 8UN thread series is specified on fastener larger than 1” in diameter.Below is a basic summary of a few of the common grades within the ASTM A320 specification. A number of other less common grades of ASTM A320 exist, but not covered in the description below. GRADES
L7 | Alloy steel, AISI 4140/4142 quench & tempered | L43 | Alloy steel, AISI 4340 quench & tempered | B8 | Class 1 Stainless steel, AISI 304, carbide solution treated | B8M | Class 1 Stainless steel, AISI 316, carbide solution treated | B8 | Class 2 Stainless steel, AISI 304, carbide solution treated, strain hardened | B8M | Class 2 Stainless steel, AISI 316, carbide solution treated, strain hardened |
MECHANICAL PROPORTIES
Grade | Size | Tensile,
ksi, min Yield,
ksi, min Charpy Impact
20-ft-lbf
@ temp Elong,
%, min | RA, %, min | L7 | Up to 2 1 / 2 | 125105-150° F 16 | 50 | L43 | Up to 4 | 125105-150° F 16 | 50 | B8
Class 1 | All | 7530N/A 30 | 50 | B8M
Class 1 | All | 7530N/A 30 | 50 | B8
Class 2 | Up to 3 / 4 | 125100N/A 12 | 35 | 7 / 8 - 1 | 11580N/A 15 | 35 | 1 1 / 8 - 1 1 / 4 | 10565N/A 20 | 35 | 1 3 / 8 - 1 1 / 2 | 10050N/A 28 | 45 | B8M
Class 2 | Up to 3 / 4 | 11095N/A 15 | 45 | 7 / 8 - 1 | 10080N/A 20 | 45 | 1 1 / 8 - 1 1 / 4 | 9565N/A 25 | 45 | 1 3 / 8 - 1 1 / 2 | 9050N/A 30 | 45 |
RECOMMENDED NUTS and WASHERS
Grade Nuts | Washers | L7 A194 Grade 4 or 7 | F436 | L43 A194 Grade 4 or 7 | F436 | B8 Class 1 A194 Grade 8 | SS304 | B8M Class 1 A194 Grade 8M | SS316 | B8 Class 2 A194 Grade 8 , strain hardened | SS304 | B8M Class 2 A194 Grade 8M , strain hardened | SS316 |
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| ASTM A325 | The ASTM A325 specification covers high strength heavy hex structural bolts from ?” diameter through 1-1/2” diameter. These bolts are intended for use in structural connections and therefore have shorter thread lengths than standard hex bolts.This specification is applicable to heavy hex structural bolts only. For bolts of other configurations and thread lengths with similar mechanical properties, please refer to ASTM A449 .Bolts for general applications, including anchor bolts, are covered by ASTM A449. Also refer to A449 for quenched and tempered steel bolts and studs with diameters greater than 1-1/2" but with similar mechanical properties. GRADES
TYPE 1 | Medium carbon, carbon boron, or medium carbon alloy steel | TYPE 2 | Withdrawn November 1991 | TYPE 3 | Weathering steel | T | Fully threaded per ASTM A325 | M | Metric A325 |
CONNECTION TYPES
SC | Slip critical connection | N | Bearing type connection with threads included in the shear plane | X | Bearing type connection with threads excluded from the shear plane |
MECHANICAL PROPORTIES
Size Tensile, ksi Yield, ksi Elong %, min | RA %, min | 1/2 – 1120 min92 min 14 | 35 | 1-1/8 – 1-1/2105 min81 min 14 | 35 |
RECOMMENDED NUTS and WASHERS
Nuts | Washers | Type 1 | Type 3 | Type 1 | Type 3 | Plain | Galvanized | Plain | A563C, C3, D, DH, DH3 | A563DH | A563C3, DH3 | F463-1 | F463-3 | Note: Nuts conforming to A194-2H are a suitable substitute for use with A325 heavy hex structural bolts. The ASTM A563 Nut Compatibility Chart has a complete list of specifications. |
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| ASTM A354 | The ASTM A354 specification covers the chemical and mechanical requirements of quenched and tempered alloy steel bolts, studs, and other externally threaded fasteners 4" and under in diameter.Two strength levels, grade BC and grade BD, are summarized in the chart below. This specification is unrestricted in its configuration and can be a headed bolt , bent bolt , or threaded rod . GRADES
A354 BC | Lower in strength than grade BD | A354 BD | A354 grade BD bolts are higher in strength than A354 grade BC and equal in strength to ASTM A490 bolts. Unlike ASTM A490 however, the A354 BD specification is unrestricted in its configuration. Since A490 bolts are heavy hex structural bolts and do not exceed 1-1/2" diameter, specification A354 BD should be considered for anchor bolts, threaded rods, other styles of headed bolts, and bolts larger than 1-1/2" diameter where similar mechanical properties are desired. A354 grade BD does not require a magnetic particle test as is required by the A490 specification. |
MECHANICAL PROPORTIES
Grade | Size | Tensile, ksi, min Yield, ksi, min Elong %, min | RA %, min | BC | 1/4 – 2-1/2 | 125109 16 | 50 | 2-5/8 – 4 | 11599 16 | 45 | BD | 1/4 – 2-1/2 | 150130 14 | 40 | 2-5/8 - 4 | 140115 14 | 40 |
RECOMMENDED NUTS and WASHERS
Nuts | Washers | Grade BC | Grade BD | Plain | Galvanized | Plain | A563C Heavy Hex | A563DH Heavy Hex | A563DH Heavy Hex | F436 | * Nuts of other grades load stresses greater than the specified grade are suitable. Refer to ASTM A563 Nut Compatibility Chart for details. |
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| ASTM A449 | ASTM A449 covers headed bolts , rods , and bent bolts in diameters ranging from 1/4" through 3" inclusive. It is a medium strength bolt manufactured from a medium carbon or alloy steel that develops its mechanical values through a heat treating process. It is intended for general engineering applications.ASTM A449 is virtually identical in chemistry and strength to ASTM A325 and SAE J429 grade 5. However, A449 is more flexible in the sense that it covers a larger diameter range and is not restricted by a specific configuration. GRADES
TYPE 1 | Plain carbon steel, carbon boron steel, alloy steel or alloy boron steel | TYPE 2 | Withdrawn 2003 | TYPE 3 | Weathering steel |
MECHANICAL PROPORTIES
Size Tensile, ksi Yield, ksi Elong %, min | RA %, min | 1/4 – 1120 min92 min 14 | 35 | 1-1/8 – 1-1/2105 min81 min 14 | 35 | 1-5/8 - 390 min58 min 14 | 35 |
RECOMMENDED NUTS and WASHERS
Nuts | Washers | Plain | Galvanized | 1/4 – 1-1/2 | 1-5/8 - 3 | 1/4 – 3 | A563B Hex | A563A Heavy Hex | A563DH Heavy Hex | F436 | Note: Nuts of other grades having proof load stresses greater than the specified grade are suitable. The ASTM A563 Nut Compatibility Chart has a complete list of specifications. |
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| ASTM A490 | The ASTM A490 specification covers quenched and tempered, alloy steel, heavy hex structural bolts from ?” diameter through 1?” diameter with a minimum 150 ksi tensile. These bolts are intended for use in structural connections and therefore have shorter thread lengths than standard hex bolts. Refer to the Structural Bolts page of our site for thread lengths and other related dimensions. A490 bolts are similar in application and dimensions to A325 heavy hex structural bolts but are made from an alloy steel rather than a medium carbon steel, resulting in a higher strength fastener.The A490 specification is applicable to heavy hex structural bolts only. For bolts with different thread lengths than specified for structural bolts but with similar mechanical properties, see Specification A354 grade BD .ASTM A490 bolts shall not be coated by hot-dip galvanizing, mechanical deposition, or electroplating with zinc or other metallic coatings due to the potential risk of hydrogen embrittlement. Additional testing in the form of Magnetic Particle Inspection for Longitudinal Discontinuities and Transverse Cracks is a requirement of the A490 specification. GRADES
TYPE 1 | Medium carbon and alloy steel | TYPE 2 | Withdrawn in 2002 | TYPE 3 | Weathering steel | M | Metric A490 |
CONNECTION TYPES
SC | Slip critical connection | N | Bearing type connection with threads included in the shear plane | X | Bearing type connection with threads excluded from the shear plane |
MECHANICAL PROPORTIES
Size Tensile, ksi Yield, ksi Elong %, min | RA %, min | 1/2 – 1150 - 173 min130 min 14 | 40 |
RECOMMENDED NUTS and WASHERS
Nuts | Washers | Type 1 | Type 3 | Type 1 | Type 3 | A563DH | A563DH3 | F436-1 | F436-3 | Note: Nuts conforming to A194-2H are a suitable substitute for use with A490 heavy hex structural bolts.The bolts shall not be coated by hot-dip zinc coating, mechanical deposition, or electroplating with zinc or other metallic coatings due to the potential for hydrogen embrittlement.Each sample representative of the lot shall be magnetic particle inspected for longitudinal discontinuities and transverse cracks. |
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| ASTM A563 | The ASTM A563 specification covers the chemical and mechanical requirements for carbon and alloy steel nuts used on bolts, studs, and externally threaded fasteners. The charts below address over tapping allowances for hot-dip galvanized nuts, grade marking requirements, and mechanical requirements.According the A563 specification, “The requirements for any grade of nut may, at the supplier's option, and with notice to the purchaser, be fulfilled by furnishing nuts of one of the stronger grades specified herein unless such a substitution is barred in the inquiry and purchase order”. This is important because some nut grades are not readily available in certain sizes and finishes. Additionally, the specification allows for the substitution of ASTM A194 grade 2H nuts in lieu of A563 grade DH nuts due to the lack of availability of grade DH nuts in nominal sizes ?” and larger.Hot-dip galvanized nuts must be tapped oversize to allow for the added thickness of the zinc on the threads of the externally threaded fastener. Various nut styles exist and to some degree are determined by their grade. These styles include hex , heavy hex , square , jam , coupling , and sleeve . GRADES
A | Low carbon steel, hex or heavy hex | B | Low carbon steel, hex or heavy hex | C | Carbon steel, quench & tempered, heavy hex | D | Carbon steel, quench & tempered, heavy hex | DH | Carbon steel, quench & tempered, heavy hex | C3 | Weathering steel, quench & tempered, heavy hex | DH3 | Weathering steel, quench & tempered, heavy hex |
MECHANICAL PROPORTIES
Grade | Style | Size, in. | Proof Load, ksi | Hardness, HBN | Black | Galvanized | A | Hex | 1/4 - 1-1/2 | 90 68 | 116 - 302 | Heavy Hex | 1/4 - 4 | 100 75 | 116 - 302 | B | Heavy Hex | 1/4 - 1 | 133 100 | 121 - 302 | Heavy Hex | 1-1/8 - 1-1/2 | 116 87 | 121 - 302 | C / C3 | Heavy Hex | 1/4 - 4 | 144 144 | 143 - 352 | D | Heavy Hex | 1/4 - 4 | 150 150 | 248 - 352 | DH / DH3 | Heavy Hex | 1/4 - 4 | 175 150 | 248 - 352 | For UNC, 8UN, 6UN, and Coarse Pitch Threads |
GRADE IDENTIFICATION AND MARKINGS
Grade Identification Marking | Specification | Material | Nominal Size, In. | Proof Load Stress, ksi | Hardness Rockwell | See Note | Min | Max | 
No Mark
| ASTM A563 Grade O Carbon Steel | 1/4 - 1-1/2 | 69 | B55 C32 | 2,3 | ASTM A563 Grade A Carbon Steel | 1/4 - 1-1/2 | 90 | B68 C32 | 2,3 | ASTM A563 Grade B Carbon Steel | 1/4 - 1 | 120 | B69 C32 | 2,3 | >1 - 1-1/2 | 105 |  ASTM A563 Grade C
Carbon Steel, may be Quenched and Tempered | 1/4 - 4 | 144 | B78 C38 | 4 |  ASTM A563 Grade C3
Atmospheric Corrosion Resistant Steel, may be Quenched and Tempered | 1/4 - 4 | 144 | B78 38 | 4,6 |  ASTM A563 Grade D
Carbon Steel, may be Quenched and Tempered | 1/4 - 4 | 150 | B84 C38 | 5 |  ASTM A563 Grade DH
Carbon Steel, Quenched and Tempered | 1/4 - 4 | 175 | C24 C38 | 5 |  ASTM A563 Grade DH3
Atmospheric Corrosion Resistant Steel, Quenched and Tempered | 1/4 - 4 | 175 | C24 C38 | 4,6 | NOTES: • In addition to the indicated grade marking, all grades, except A563 grades O, A, and B, must be marked for manufacturer identification.• Nuts are not required to be marked unless specified by the purchaser. When marked, the identification marking shall be the grade letter O, A, or B.• Properties shown are those of nonplated or noncoated coarse thread nuts.• Properties shown are those of coarse thread heavy hex nuts.• Properties shown are those of coarse thread heavy hex nuts. Other nuts styles and fine threads may apply. • The nut manufacturer, at his option, may add other markings to indicate the use of atmospheric corrosion resistant steel. |
THREAD DIMENSIONS AND OVERSIZING ALLOWANCES for Nuts: Hot Dipped Galvanized per Specification A153, C1.C
Nominal Nut Size,
in. and Pitch Diametral Allowance,
in. | Pitch Diameter | Min | Max | 0.250 - 20 0.016 | 0.2335 | 0.2384 | 0.312 - 18 0.017 | 0.2934 | 0.2987 | 0.375 - 16 0.017 | 0.3514 | 0.3571 | 0.437 - 14 0.018 | 0.4091 | 0.4152 | 0.500 - 13 0.018 | 0.4680 | 0.4745 | 0.0562 - 12 0.020 | 0.5284 | 0.5352 | 0.625 - 11 0.020 | 0.5860 | 0.5932 | 0.750 - 10 0.020 | 0.7050 | 0.7127 | 0.875 - 9 0.022 | 0.8248 | 0.8330 | 1.000 - 8 0.024 | 0.9428 | 0.9516 | 1.125 - 8 0.024 | 1.0678 | 1.0768 | 1.125 - 7 0.024 | 1.0562 | 1.0656 | 1.250 - 8 0.024 | 1.1928 | 1.2020 | 1.250 - 7 0.024 | 1.1812 | 1.1908 | 1.375 - 8 0.027 | 1.3208 | 1.3301 | 1.375 - 6 0.027 | 1.2937 | 1.3041 | 1.500 - 8 0.027 | 1.4458 | 1.4553 | 1.500 - 6 0.027 | 1.4187 | 1.4292 | 1.750 - 5 0.050 | 1.6701 | 1.6817 | 2.000 - 4.5 0.050 | 1.9057 | 1.9181 | 2.250 - 4.5 0.050 | 2.1557 | 2.1683 | 2.500 - 4 0.050 | 2.3876 | 2.4011 | 2.750 - 4 0.050 | 2.6376 | 2.6513 | 3.250 - 4 0.050 | 3.1376 | 3.1517 | 3.500 - 4 0.050 | 3.3876 | 3.4019 | 3.750 - 4 0.050 | 3.3876 | 3.4019 | 4.000 - 4 0.050 | 3.8876 | 3.9023 | . |
| ASTM F1554 | The ASTM F1554 specification covers anchor bolts designed to anchor structural supports to concrete foundations. F1554 anchor bolts can take the form of either headed bolts, straight rods, or bent anchor bolts. The three grades 36, 55, and 105 designate the minimum yield strength (ksi) of the anchor bolt. The bolts can be either cut or roll threaded and a weldable grade 55 can be substituted for grade 36 at the supplier's option. Color coding on the end - 36 blue, 55 yellow, and 105 red – helps facilitate easy identification in the field. Permanent manufacturer and grade marking is allowed under the S2 supplementary requirements.Applications for F1554 anchor bolts include columns in structural steel framed buildings, traffic signal and street lighting poles, and overhead highway sign structures to name just a few. GRADES
F1554 Grade 36 | Low carbon, 36ksi yield steel anchor bolts | F1554 Grade 55 | Low alloy, 55ksi yield steel anchor bolts | F1554 Grade 105 | Alloy, heat treated, high strength 105ksi yield steel anchor bolts |
MECHANICAL PROPORTIES
Grade Size inches Tensile, ksi Yield, ksi min Yield, MPa min Elong. % min | RA % min | 36 1/4 - 458 - 8036248 23 | 40 | 55 | 1/4 - 275 - 9555380 21 | 30 | 2? - 2?75 - 9555380 21 | 22 | 2? - 375 - 9555380 21 | 20 | 3? - 475 - 9555380 21 | 18 | 105 1/4 - 3125 - 150105724 15 | 45 |
RECOMMENDED NUTS and WASHERS
Grade Size inches Plain Galvanized | Washer | 36 | 1/4 - 1-?A563A Hex A563A Hex | F436 | 1-? - 4A563A Heavy Hex A563A Heavy Hex | F436 | 55 | 1/4 - 1-?A563A Hex A563A Heavy Hex | F436 | 1-? - 4A563A Heavy Hex A563A Heavy Hex | F436 | 105 | 1/4 - 1-?A563D Heavy Hex1 A563DH Heavy Hex2 | F436 | 1-? - 3A563DH Heavy Hex2 A563DH Heavy Hex2 | F436 | • A563-D rarely available, A563DH or A194-2H substituted. • Per ASTM A563, A194-2H may be substituted for A563-DH. |
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| ASTM F2329 | ASTM F2329 covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special threaded fasteners applied by the hot-dip coating process . This specification was developed in 2005, but is not yet widely used since many of the ASTM specification covering threaded fasteners do not reference it. As soon as these specifications are updated to reference the ASTM F2329 specification, it will likely become much more prevalent than ASTM A153 which is the specification that is currently used to cover hot-dip galvanizing of bolts. ASTM A123 is a related hot-dip galvanizing specification covering iron and steel products made from rolled pressed and forged shapes, castings, plates, bars, and strips. |
| ASTM A563 Nut Compatibility Chart |
Grade of Bolt | Surface Finish | Nominal Size Inches | A563 Grade and ANSI Nut Style | Recommended | Suitable | Hex Heavy
Hex Hex | Heavy
Hex | A307 Grade A & C Any | ? to 1?A B,D,DH | A,B,C,D,DH,DH3 | >1? to 2A A | C,D,DH,DH3 | >2 to 4A | C,D,DH,DH3 | A307 Grade B Any | ? to 1?A B,D,DH | A,B,C,D,DH,DH3 | >1? to 2A A | | >2 to 4A | | A325 Type 1 | Plain? - 1?C | C3,D,DH,DH3 | Galvanized? - 1?DH | | A325 Type 3Plain? - 1?C3 | DH3 | A354 Grade BC | Plain | ? to 1?C D,DH | C3,D,DH,DH3 | >1? to 4C | C3,D,DH,DH3 | Galvanized | ? to 1?DH | | >1? to 4DH | | A354 Grade BD Plain | ? to 1?DH DH | D,DH,DH3 | >1? to 4DH | DH3 | A449 | Plain | ? to 1?B D,DH | B,C,C3,D,DH,DH3 | >1? to 3A | C,C3,D,DH,DH3 | Galvanized | ? to 1?DH D,DH | D | >1? to 3DH | D | A490 Type 1Plain? - 1?DH | DH3 | A490 Type 3Plain? - 1?DH3 | | A687 | Plain? - 3D | DH,DH3 | Galvanized? - 3DH | | F1554 Grade 36 Any | ? to 1?A B,D,DH | A,B,C,D,DH,DH3 | >1? to 4A | C,D,DH,DH3 | F1554 Grade 55 | Plain | ? to 1?A B,D,DH | A,B,C,D,DH,DH3 | >1? to 4A | C,D,DH,DH3 | Galvanized? to 4A | C,D,DH,DH3 | F1554 Grade 105 | Plain | ? to 1?D | DH,DH3 | >1? to 3DH | DH3 | Galvanized? to 3DH | DH3 |
1. The availability of A563 grade DH nuts in nominal sizes 3/4" and larger is very limited and generally available only on special orders of 50,000 or more. For smaller quantities, ASTM A194 grade 2H should be considered. |
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Inspection & Approval Certificates : EN10204 3.1 / DIN 50049 3.1 / ISO 10474 3.1 Mill Test Certificate, NACE MR-01-75 / ISO 15156, CE Marked, European Pressure Equipment Directive PED-97/23/EC, AD-2000-W0, ASME Boiler & Pressure Vessel Code Sec.II Part A Ed. 2008, with 3.2 certificate duly Certified & Approved by LRS (Lloyd's Register), GL (Germanischer Lloyd), BV (Bureau Veritas), DNV (Det Norske Veritas), ABS (American Bureau of Shipping), SGS, TUV, RINA, IRS, NORSOK Approved Standard M-630, M-650 Rev.3
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