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Torque Specifications
Use these torque values when specific torque values
are not given. DO NOT use these values in place of
specified values.
The torque values listed below are for lubricated
threads. Plated threads are considered to be lubricated.
Capscrew Markings and Torque Values - U.S. Customary
Capscrew Markings and Torque Values – Metric
SAE Grade Number 5 8
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Capscrew Head Markings
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Capscrew Torque - Grade 5 Capscrew Torque - Grade 8
Capscrew Body Size Cast Iron Aluminum Cast Iron Aluminum
ft-lb Nm ft-lb Nm ft-lb Nm ft-lb Nm
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1/4-20 79681115912
-28 9 12 7 9 13 18 10 14
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5/16-18 1520121622301824
-24 1723141924331925
________________________________________________________________________________________________________________________________________________________
3/8-16 3040202540553040
-24 3040253545603545
________________________________________________________________________________________________________________________________________________________
7/16-14 4560354565905065
-20 5065405570955575
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1/2-13 709555759513075100
-20 75 100 60 80 110 150 90 120
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9/16-12 100 135 80 110 140 190 110 150
-18 110 150 85 115 155 210 125 170
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5/8-11 135 180 110 150 190 255 150 205
-18 155 210 120 160 215 290 170 230
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3/4-10 240 325 190 255 340 460 270 365
-16 270 365 210 285 380 515 300 410
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7/8-9 360 490 280 380 550 745 440 600
-14 390 530 310 420 610 825 490 660
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1-8 530 720 420 570 820 1100 660 890
-14 590 800 480 650 890 1200 710 960
Commercial Steel Class 8.8 10.9 12.9
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Capscrew Head Markings
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Thread Capscrew Torque - Class 8.8 Capscrew Torque - Class 10.9 Capscrew Torque - Class 12.9
Diameter Cast Iron Aluminum Cast Iron Aluminum Cast Iron Aluminum
mm ft-lb Nm ft-lb Nm ft-lb Nm ft-lb Nm ft-lb Nm ft-lb Nm
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65947914711914711
________________________________________________________________________________________________________________________________________________________
7 914 7111418111418231418
________________________________________________________________________________________________________________________________________________________
8182514182332182527362128
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10 30 40 25 30 45 60 35 45 50 70 40 55
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12 55 70 40 55 75 105 60 80 95 125 75 100
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14 85 115 65 90 120 160 95 125 145 195 110 150
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16 130 180 100 140 175 240 135 190 210 290 165 220
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18 170 230 135 180 240 320 185 250 290 400 230 310
Greensmaster
®
3100 Page 2 - 3 Torque Specifications