70 SAE Bolt and Nut Torque Value Chart Grade 5: UNC or UNF Thread Grade 8:
UNC or UNF Thread *drilled and tapped Size Hex nut, or bolt tapped into hex nut, or d&t hole Hex top deformed locknut Flange nut, locknut, or bolt tapped into flange nut or d&t* hole ft•lb N•m ft•lb N•m ft•lb N•m 1/4 12 16 8 11 20 27 5/16 25 34 15 20 45 60 3/8 40 54 25 34 75 100 7/16 65 90 40 55 125 170 1/2 100 135 60 80 190 260 9/16 150 200 90 125 270 370 5/8 200 270 120 165 370 500 3/4 350 475 210 285 650 880 7/8 560 760 340 460 1250 1425 1 840 1140 500 680 1580 2145 1-1/8 1030 1400 320 840 1950 3645 1-1/4 1460 1980 880 1195 2760 3475 Size Hex nut, or bolt tapped into hex nut, or d&t hole Hex top deformed locknut Flange nut, locknut, or bolt tapped into flange nut or d&t* hole ft•lb N•m ft•lb N•m ft•lb N•m 1/4 14 19 10 14 24 33 5/16 30 40 18 25 50 70 3/8 55 73 35 50 90 125 7/16 85 115 50 70 140 190 1/2 130 175 80 110 220 300 9/16 190 260 110 150 310 420 5/8 260 355 160 245 430 585 3/4 450 610 270 365 750 1015 7/8 730 990 440 600 1210 1640 1 1090 1480 650 880 1320 2465 1-1/8 1550 2100 930 1260 2580 3500 1-1/4 2180 2955 1310 1780 3640 4935