Challenger MT297 - Standard Torque Chart

Torque Charts
01-8 79028569 A Rev.
STANDARD TORQUE CHART
Torque Chart for Metric Fasteners (Zinc Coated)
Nominal Size
In mm
Strength Class
ISO 4.6 (4T)
Strength Class
ISO 8.8 (7T)
Strength Class
ISO 10.9 (9T)
Torque Nm (lbf-ft) Torque Nm (lbf-ft) Torque Nm (lbf-ft)
Min. Max. Min. Max. Min. Max.
M3 0.5 (0.3) 0.7 (0.5) 1.3 (0.9) 1.7 (1.3) 1.8 (1.3) 2.4 (1.8)
M4 1.2 (0.9) 1.6 (1.2) 3.1 (2.3) 4.1 (3.0) 4.3 (3.2) 5.7 (4.2)
M5 2.2 (1.6) 3.0 (2.2) 6.0 (4.4) 8.0 (5.9) 8.5 (6.3) 11.5 (8.5)
M6 4.2 (2.9) 5.0 (3.7) 10 (7.4) 14 (10.3) 14 (10.3) 20 (14.8)
M8 9.5 (7.0) 12.5 (9.2) 25 (18.4) 35 (26) 36 (26) 46 (34)
M10 19 (14) 25 (18) 50 (37) 70 (52) 72 (53) 96 (71)
M12 33 (24) 43 (32) 90 (66) 120 (89) 120 (89) 160 (118)
M20 160 (118) 210 (155) 420 (310) 560 (413) 600 (443) 800 (590)
M24 280 (207) 360 (266) 720 (531) 860 (634) 1000 (738) 1300 (959)
M30 540 (398) 720 (531) 1400 (1033) 1800 (1328) 2100 (1549) 2800 (2065)
M36 950 (700) 1250 (922) 2500 (1844) 3300 (2434) 3600 (2655) 4800 (3540)
Torque Chart for Inch Fasteners (Zinc Coated)
Nominal Size
Strength Class -
Below SAE5 (plain head)
Strength Class
SAE 5
Strength Class
in inches SAE 8
Torque Nm (lbf-ft Torque Nm (lbf-ft) Torque Nm (lbf-ft)
Min. Max. Min. Max. Min. Max.
1/4 6.8 (5) 8.1 (6) 10.8 (8) 15 (11) 16.2 (12) 21.7 (16)
5/16 13.5 (10) 16.2 (12) 22 (16) 30 (22) 31 (23) 42 (31)
3/8 24 (18) 28 (21) 39 (29) 53 (39) 56 (41) 75 (55)
7/16 41 (30) 46 (34) 64 (47) 85 (63) 91 (67) 121 (89)
1/2 61 (45) 70 (52) 99 (73) 131 (97) 140 (103) 185 (137)
5/8 122 (90) 142 (105) 198 (146) 263 (194) 279 (206) 371 (274)
3/4 217 (160) 250 (185) 350 (258) 464 (342) 495 (365) 658 (485)
7/8 -- -- 569 (420) 800 (759) 800 (590) 1071 (790)
1 -- -- 847 (635) 1119 (825) 1200 (885) 1580 (1165)
1-1/8 -- -- 1051 (775) 1390 (1025) 1681 (1240) 2224 (1640)
1-1/4 -- -- 1491 (1033) 1966 (1450) 2386 (1760) 3159 (2330)
1-1/2 -- -- 2576 (1900) 3390 (2500) 4121 (3040) 5437 (4010)