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Standard Torque Value Chart
Fastener Type

Body Size or Outside Diameter of Fastener

... 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 1 5/8 1 3/4 1 7/8 2 2 1/4 2 1/2 2 3/4 3
SAE D-1 2
Min Tensile Strength:74,000 PSI
Material:Low Carbon Steel
   6 12 20 32 47 69 96 155 206 310 480 675 900 1100 1470 1900 2360 2750 3450 4400 7350 9500
SAE 3
Min Tensile Strength:100,000 PSI
Material:Medium Carbon Steel
   9 17 30 47 69 103 145 234 372 551 872 1211 1624 1943 2660 3463 4695 5427 7226 8049 13450 17548
SAE 5
Min Tensile Strength:120,000 PSI
Material:Medium Carbon Heat Treat Steel
   10 19 33 54 78 114 154 257 382 587 794 1105 1500 1775 2425 3150 4200 4550 6550 7175 13000 16000
SAE 6
Min Tensile Strength:133,000 PSI
Material:Medium Carbon Steel Quenched Tempered
   12.5 24 43 69 106 150 209 350 550 825 1304 1815 2424 2913 3985 5189 6980 7491 10825 14983 20151 26286
SAE 7
Min Tensile Strength:133,000 PSI
Material:Medium Carbon Alloy Steel
   13 25 44 71 110 154 215 360 570 840 1325 1825 2500 3000 4000 5300 7000 7500 11000 15500 21000 27000
SAE 8
Min Tensile Strength:150,000 PSI
Material:Medium Carbon Alloy Steel
   14 29 47 78 119 169 230 380 600 900 1430 1975 2650 3200 4400 5650 7600 8200 12000 17000 23000 29000
Socket Head Cap Screw
Min Tensile Strength:160,000 PSI
Material:High Carbon Case Hardened Steel
   16 33 54 84 125 180 250 400 640 970 1520 2130 2850 3450 4700 6100 8200 8800 13000 18000 24000 31000
 
TORQUE VALUES: All figures are foot-pounds except those marked with an aserisk (*), those indicate inch-pounds.
Fastener Type

Body Size or Outside Diameter of Fastener

2 3 4 5 6 8 10 1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1 1/8 1 1/4 1 3/8 1 1/2 ...
Socket Set Screw
Min Tensile Strength:212,000 PSI
Material:High Carbon Case Hardened Steel
         9* 16* 30* 70* 140* 18 29 43 63 100 146              
Machine Screw Yellow Brass
Min Tensile Strength:60,000 PSI
Material:Cooper (CU) 63% Zinc (ZN) 37%
 2* 3.3* 4.4* 6.4* 8* 16* 20* 65* 110* 17 27 37 49 78 104 160 215 325 400   595  
Silicon Bronze Type "B"
Min Tensile Strength:70,000 PSI
Material:Cooper (CU) 96% Zinc (ZN) 2% Silicon (SI) 2%
 2.3* 3.7* 4.9* 7.2* 10* 19* 22* 70* 125* 20 30 41 53 88 117 180 250 365 450   655  
There is no difference in the above chart between the torque figures for fine or coarse threads. The torque figures for a finely-threaded fastener as compared to a coarsely-threaded fastener of the same diameter may be slightly higher but not significant enough to note.

 

Safety Notice

THERE ARE MANY VARYING FACTORS WHICH AFFECT TORQUE. THE FIGURES IN THIS CHART ARE SAFE FIGURES FOR STANDARD TORQUE APPLICATIONS ONLY.

 

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