ASTM A320 Grade L7
ASTM A320 Grade L7 Heavy Hex Bolts
Low Temperature Alloy Steel Bolting
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
| DIN | ISO | ASME | UNI | |
| Imperial | Metric | |||
| 6914 | 7411 | B18.2.1 | B18.2.3.7M | 5712 |