ASTM A320 Grade L7 Heavy Hex Bolts
Boltport offers ASTM A320 Grade L7 Heavy Hex Bolts in metric and inch sizes, manufactured to DIN 6914, ISO 7412, ASME B18.2.1, B18.2.3.7M & UNI 5712 standards with coarse, UNC, UN, fine UNF, extra fine UNEF, ISO, BSW & BSF threads. Heavy Hex bolts are available in full thread, part threads with full shank and reduced shank type pattern. A320 Grade L7 heavy hex bolts are produced from SAE / AISI 4140 alloy steel and heat-treated to induce properties suitable for low temperature service.
Heavy Hex Bolt Sizes & Thread Specifications
| Metric Sizes |
M12 to M152 |
| Inch Sizes |
1/2" to 8" |
| Metric Threads |
ISO, ASME |
| Imperial Threads |
ASME, BSW, BSF |
| Thread Standards |
ISO 68-1, ISO 268, ISO 724, ASME B1.1, ASME B1.13M, BS 84, BS 3643 |
Heavy Hex Bolt Standards
