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Carbon Steel Bolts, Studs, Stud Bolts, and Threaded Rod 60 000 PSI Tensile Strength
Adfast Component LTD specializes in providing ASTM A307 carbon steel bolts and studs, available in sizes ranging from ¼ inch to 4 inches. We offer bolting solutions such as Hex Bolts, Heavy Hex Bolts, Studs, Socket Head Cap Screws, Hex Cap Screws, Threaded Rods, and Threaded Bars in imperial (¼” to 4”) and metric (M6 to M100) sizes with both fine and coarse thread options. For specific customer requirements, we can also manufacture Grade B threaded rods on demand.
Certified under PED 2014/68/EC, our bolting components, including sizes up to 6 inches, come with superior quality and industry-standard certifications. Adfast Component LTD ensures ready availability of ASTM/ASME A307 bolting solutions to meet your urgent project needs.
| Grade | Description |
|---|---|
| ASTM 307 Grade A | Bolts, studs, and threaded rod having a minimum tensile strength of 60 ksi and intended for general applications, |
| ASTM 307 Grade B | Bolts, studs, and threaded rodA having a tensile strength of 60 to 100 ksi and intended for flanged joints in piping systems with cast iron flanges, and |
| ASTM 307 Grade C | Replaced by Specification f1554Gr.36 |
| |
| Fastener Grade and Size | Nut Grade and StyleA |
|---|---|
| A 1/4 to 11/2 in. | A, hex |
| A over 11/2 to 4 in. | A, heavy hex |
| B, 1/4 to 4 in. | A, heavy hex |
| |
| Elements | Heat Analysis | Product Analysis |
|---|---|---|
| Carbon, max | 0.29 | 0.33 |
| Manganese, max | 1.20 | 1.25 |
| Phosphorus, max | 0.04 | 0.041 |
| Sulfur, max | … | … |
| Grade A | 0.15 | A |
| Grade B | 0.05 | 0.051 |
| ||
| Grade | Nominal Length, in. | HardnessA | |||
|---|---|---|---|---|---|
| Brinell | Rockwell B | ||||
| min | max | min | max | ||
| ASTM A307 A | Less than 3 × diaB | 121 | 241 | 69 | 100 |
| 3 × dia and longer | . . . | 241 | . . . | 100 | |
| ASTM A307 B | Less than 3 × diaB | 121 | 212 | 69 | 95 |
| 3 × dia and longer | . . . | 212 | . . . | 95 | |
| |||||
| Bolt Size, in. | Threads per inch | Stress Area,A in.2 | Tensile Strength, lbfB | ||
|---|---|---|---|---|---|
| Grade A, min C | Grade B | ||||
| minD | maxD | ||||
| 1/4 | 20 | 0.0318 | 1 900 | 1 900 | 3 180 |
| 5/16 | 18 | 0.0524 | 3 100 | 3 100 | 5 240 |
| 3/8 | 16 | 0.0775 | 4 650 | 4 650 | 7 750 |
| 7/16 | 14 | 0.1063 | 6 350 | 6 350 | 10 630 |
| 1/2 | 13 | 0.1419 | 8 500 | 8 500 | 14 190 |
| 9/16 | 12 | 0.182 | 11 000 | 11 000 | 18 200 |
| 5/8 | 11 | 0.226 | 13 550 | 13 550 | 22 600 |
| 3/4 | 10 | 0.334 | 20 050 | 20 050 | 33 400 |
| 7/8 | 9 | 0.462 | 27 700 | 27 700 | 46 200 |
| 1 | 8 | 0.606 | 36 350 | 36 350 | 60 600 |
| 11/8 | 7 | 0.763 | 45 800 | 45 800 | 76 300 |
| 11/4 | 7 | 0.969 | 58 150 | 58 150 | 96 900 |
| 13/8 | 6 | 1.155 | 69 300 | 69 300 | 115 500 |
| 11/2 | 6 | 1.405 | 84 300 | 84 300 | 140 500 |
| 13/4 | 5 | 1.90 | 114 000 | 114 000 | 190 000 |
| 2 | 41/2 | 2.50 | 150 000 | 150 000 | 250 000 |
| 21/4 | 41/2 | 3.25 | 195 000 | 195 000 | 325 000 |
| 21/2 | 4 | 4.00 | 240 000 | 240 000 | 400 000 |
| 23/4 | 4 | 4.93 | 295 800 | 295 800 | 493 000 |
| 3 | 4 | 5.97 | 358 200 | 358 200 | 597 000 |
| 31/4 | 4 | 7.10 | 426 000 | 426 000 | 710 000 |
| 31/2 | 4 | 8.33 | 499 800 | 499 800 | 833 000 |
| 33/4 | 4 | 9.66 | 579 600 | 579 600 | 966 000 |
| 4 | 4 | 11.08 | 664 800 | 664 800 | 1 108 000 |
| Tensile Requirements | Grade A | Grade B |
|---|---|---|
| Tensile strength, ksi | 60 min | 60-100 |
| Yield point, min ksi | . . . | . . . |
| Elongation in 2 in., min, % | 18 | 18 |
Unless otherwise specified, bolts, studs, and threaded rod to be used with nuts or tapped holes which have been tapped oversize, in accordance with Specification A563, shall have threads as specified in B1.1 before hot-dip or mechanically deposited zinc coating. After zinc coating the maximum limit of pitch and major diameter shall not exceed the Class 2A maximum limit by more than the following amounts
| Diameter, in. | Oversize Limit, in.A |
|---|---|
| 1/4 | 0.016 |
| 5/16 , 3/8 | 0.017 |
| 7/16 , 1/2 | 0.018 |
| 9/16 to 3/4 , incl | 0.020 |
| 7/8 | 0.022 |
| 1.0 to 11/4 , incl | 0.024 |
| 13/8 , 11/2 | 0.027 |
| 13/4 to 4.0, incl | 0.050 |
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A153/A153M Specification for Hot Dip Galvanising (Zinc Coating) on Iron and Steel Hardware
B633 Specification for Electrodeposited Coatings of Zinc on Iron and Steel
B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
B696 Specification for Coatings of Cadmium Mechanically Deposited
B766 Specification for Electrodeposited Coatings of Cadmium
F1941/F1941M Specification for Electrodeposited Coatings on Mechanical Fasteners, Inch and Metric
F2329/F2329M Specification for Zinc Coating, Hot-Dip, Requirements for Application to Carbon and Alloy Steel Bolts, Screws, Washers, Nuts, and Special Threaded Fasteners
Product Shall be Marked with our manufacturing trade mark Adfast Component LTD along with the designated Grade.
Grade and manufacturer’s identification symbols shall be applied to one end of studs and to the heads of bolts and screws of all sizes. (If the available area is inadequate, the grade symbol may be marked on one end and the manufacturer’s identification symbol marked on the other end.) For bolts and screws smaller than 1⁄4 in. [6 mm] in diameter and studs smaller than 3⁄8 in. [10 mm] in diameter and for 1⁄4 in. [6 mm] in diameter studs requiring more than a total of three symbols, the marking shall be a matter of agreement between the purchaser and the manufacturer.
B18.31.2 Imperial Continious Thread, Double End Reduced & Full Body Studs
B18.31.1M Metric Continious Thread, Double End Reduced & Full Body Studs
B16.5 Imperial Full Thread Stud Bolts
B16.5 Metric Full Thread Stud Bolts
B18.2.1 Imperial Square and Hex Bolts and Screws
B18.31.3 Threaded Rods (Inch Series)
| S1 | Bolts Suitable for Welding |
|---|---|
| S2 | Permanent Manufacturer’s Identification |
| S3 | Permanent Grade Identification |