ARP Torque Specs

Recommended Torque to Achieve Optimum Preload (Clamping Force) Using ARP Ultra-Torque® Fastener Assembly lubricant*

Note: For those using Newton/meters as a torquing reference, you must multiply the appropriate ft./lbs. factor by 1.356

Fastener Diameter

Fastener Tensile Strength

170,000 / 180,000 (PSI)
( 1,171 Nmm2 )
190,000 / 200,000 (PSI)
( 1,300 Nmm2 )
220,000 (PSI)
( 1,515 Nmm2 )
TORQUE*
( Ft. / Lbs. )
PRELOAD
( Lbs. )
TORQUE*
( Ft. / Lbs. )
PRELOAD
( Lbs. )
TORQUE*
( Ft. / Lbs. )
PRELOAD
( Lbs. )
1/4″ 12 3,492 14 3,967 16 4,442
5/16″ 24 5,805 28 6,588 32 7,371
3/8″ 45 8,622 50 9,782 55 10,942
7/16″ 70 11,880 80 13,470 90 15,060
1/2″ 110 16,391 125 18,515 140 20,639
9/16″ 160 21,220 180 23,944 200 26,668
5/8″ 210 26,372 240 29,756 270 33,140
6 mm 11 3,359 13 3,814 15 4,269
8 mm 24 5,801 28 6,581 32 7,361
10 mm 54 9,970 62 11,305 70 12,640
11 mm 72 12,184 82 13,961 92 15,738
12 mm 98 14,472 112 16,949 125 19,425
14 mm N/A N/A 184 22,771 205 25,730
16 mm N/A N/A 244 29,664 272 33,519

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