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

• 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

MECHANICAL PROPORTIES

RECOMMENDED NUTS and WASHERS

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

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

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

MECHANICAL PROPORTIES

RECOMMENDED NUTS and WASHERS

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

MECHANICAL PROPORTIES

RECOMMENDED NUTS and WASHERS

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

CONNECTION TYPES

MECHANICAL PROPORTIES

RECOMMENDED NUTS and WASHERS

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

MECHANICAL PROPORTIES

RECOMMENDED NUTS and WASHERS

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

MECHANICAL PROPORTIES

RECOMMENDED NUTS and WASHERS

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

CONNECTION TYPES

MECHANICAL PROPORTIES

RECOMMENDED NUTS and WASHERS

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

MECHANICAL PROPORTIES

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

MECHANICAL PROPORTIES

RECOMMENDED NUTS and WASHERS

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