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Lister Grade 2 ft.lb
Bolt Diameter Proof Load PSI Tensile Strength PSI Min Recommended Torque
UNC UNF 8-UN
3/4" 55,000 74,000 190 213 0
7/8" 33,000 60,000 194 214 0
1" 33,000 60,000 291 318 291
1 1/8" 33,000 60,000 412 462 427
1 1/4" 33,000 60,000 581 644 600
1 1/2" 33,000 60,000 1012 1138 1074
1 3/4" 33,000 60,000 1596 1840 * 1774
2" 33,000 60,000 2400 2774 * 2659
12-UN *
Lister Grade 5 ft.lb
Bolt Diameter Proof Load PSI Tensile Strength PSI Min Recommended Torque
UNC UNF 8-UN
3/4" 85,000 125,000 307 343 0
7/8" 85,000 120,000 496 546 0
1" 85,000 120,000 743 813 743
1 1/8" 74,000 105,000 927 1040 960
1 1/4" 74,000 105,000 1308 1449 1350
1 1/2" 74,000 105,000 2276 2561 2417
Lister Grade 8 ft.lb
Bolt Diameter Proof Load PSI Tensile Strength PSI Min Recommended Torque
UNC UNF 8-UN
3/4" 120,000 150,000 434 485 0
7/8" 120,000 150,000 701 772 0
1" 120,000 150,000 1050 1149 1050
1 1/8" 120,000 150,000 1488 1669 1541
1 1/4" 120,000 150,000 2100 2325 2167
1 1/2" 120,000 150,000 3653 4111 3879
ASTM-A449 ft.lb
Bolt Diameter Proof Load PSI Tensile Strength PSI Min Recommended Torque
UNC 8-UN
1 3/4" 55,000 90,000 2571 2815
2" 55,000 90,000 3867 4285
ASTM-A354 ft.lb
Bolt Diameter Proof Load PSI Tensile Strength PSI Min Recommended Torque
UNC 8-UN
Grade BC
1 3/4" 105,000 125,000 4832 5290
2" 105,000 125,000 7267 8051
Grade BC
1 3/4" 120,000 150,000 5763 6309
2 120,000 150,000 8667 9603
Torque values assume bolt is dry.
Lubricants, plating, etc, can reduce these values.
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