ASTM A320 Grade L7 is a standard specification for high tensile 4140 alloy steel bolting materials, intended for use in low temperature services. The term "bolting material" as used in this specification covers, rolled, forged or strain hardened bars, bolts, screws, studs and stud bolts. These alloy steel fasteners are used for bolting pressure vessels, valves, flanges and fittings for low-temperature service.
Boltport Fasteners is a manufacturer and supplier of ASTM A320 Grade L7 bolts, screws, studs, stud bolts, threaded rod and round bars. We offer full range of sizes, threads and fasteners such as hex bolts, heavy hex bolts, hex cap screws, socket head cap screws, set screws, full threaded stud bolts, double end studs, threaded rods, eye bolts and anchor bolts, etc.,
View Specification page to know more about A320 Grade L7 chemical compositions, mechanical properties such as tensile, yield strength, hardness, heat treatment procedure, product marking, etc.,
Product | DIN | ISO | ASME | UNI | |
Imperial | Metric | ||||
Hex Bolts | 931 | 4014 | B18.2.1 | B18.2.3.5M | 5737 |
Heavy Hex Bolts | 6914 | 7412 | B18.2.1 | B18.2.3.7M | 5712 |
Hex Cap Screws | 933 | 4017 | B18.2.1 | B18.2.3.1M | 5739 |
Socket Head Cap Screws | 912 | 4762 | B18.3 | B18.3.1M | 5931 |
Set Screws | 916 | 4029 | B18.3 | B18.3.1M | 5929 |
Stud Bolts | 976 | -- | B18.31.2 | B18.31.1M | 6610 |
Countersunk Screws | 7991 | 10642 | B18.3 | B18.3.1M | 5933 |
Hex Nuts | 934 | 4032 | B18.2.2 | B18.2.4.1M | 5588 |
Heavy Hex Nuts | 6915 | 4775 | B18.2.2 | B18.2.4.6M | 5713 |