General
Torque specifications for specific components are listed in each section at the point of use. When converting to Newtonmeters, use the formulas given under the metric chart. For all other steel fasteners, use the values listed in one of the tables below.
In the metric table, the values listed are in Newton-meters.
In the English table, torque values listed are in ft-lbs, except those marked with an asterisk (*), which are in in-lbs.
- foot-pounds (ft-lbs) x 1.356 = Newton-meters (Nm)
- inch-pounds (in-lbs) x 0.113 = Newton-meters (Nm)
Warning! The quality fasteners used on Harley-Davidson motorcycles have specific strength, finish and type requirements to perform properly in the assembly and the operating environment. Use only genuine Harley replacement fasteners tightened to the proper torque. Substitution could cause fastener failure, which could result in death or serious injury.
Table C-2. Metric torque values
Fastener | Type | Minimum tensile strength | Material | Body size or outside diameter | ||||||||||||||||
# (number) | mm (millimeters) | |||||||||||||||||||
2 | 3 | 4 | 5 | 6 | 8 | 10 | 6.4 | 7.9 | 9.5 | 11.1 | 12.7 | 14.3 | 15.9 | 19.1 | 22.2 | 25.4 | ||||
![]() | SAE 2 STEEL | 5,202 kg/cm2 | LOW CARBON | 8.3 | 16.6 | 27.7 | 44.3 | 65.0 | 95.4 | 132.8 | 214.4 | 283.5 | 428.7 | |||||||
![]() | SAE 5 STEEL | 8,436 kg/cm2 | MEDIUM CARBON HEAT TREAT | 1.6 | 2.5 | 13.8 | 26.3 | 45.6 | 74.7 | 107.9 | 157.7 | 213.0 | 355.4 | 528.3 | 811.8 | |||||
![]() | SAE 7 STEEL | 9,350 kg/cm2 | MEDIUM CARBON ALLOY | 18.0 | 34.6 | 60.8 | 98.2 | 152.1 | 213.0 | 297.3 | 497.9 | 788.3 | 1161.7 | |||||||
![]() | SAE 8 STEEL | 10,545 kg/cm2 | MEDIUM CARBON ALLOY | 19.4 | 40.1 | 65.0 | 107.9 | 164.6 | 233.7 | 318.1 | 525.5 | 829.8 | 1220.0 | |||||||
![]() | SAE 8 STEEL | 10,545 kg/cm2 | MEDIUM CARBON ALLOY | 19.4 | 40.1 | 65.0 | 107.9 | 164.6 | 233.7 | 318.1 | 525.5 | 829.8 | 1220.0 | |||||||
![]() | SOCKET SET SCREW | 14,904 kg/cm2 | HIGH CARBON QUENCHED TEMPERED | 1.0 | 1.8 | 3.4 | 8.1 | 16.1 | 24.9 | 40.1 | 59.5 | 87.1 | 138.3 | 201.9 | ||||||
![]() | STUDS | Use SAE 2,5 and 8 values when grade is known, with nut of sufficient strength. |
Table C-3. English torque values
Fastener | Type | Minimum tensile strength | Material | Body size or outside diameter | ||||||||||||||||
# (number) | in. (inches) | |||||||||||||||||||
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 | ||||
![]() | SAE 2 STEEL | 74,000 psi | LOW CARBON | 6 | 12 | 20 | 32 | 47 | 69 | 96 | 155 | 206 | 310 | |||||||
![]() | SAE 5 STEEL | 120,000 psi | MEDIUM CARBON HEAT TREAT | 14* | 22* | 10 | 19 | 33 | 54 | 78 | 114 | 154 | 257 | 382 | 587 | |||||
![]() | SAE 7 STEEL | 133,000 psi | MEDIUM CARBON ALLOY | 13 | 25 | 44 | 71 | 110 | 154 | 215 | 360 | 570 | 840 | |||||||
![]() | SAE 8 STEEL | 150,000 psi | MEDIUM CARBON ALLOY | 14 | 29 | 47 | 78 | 119 | 169 | 230 | 380 | 600 | 900 | |||||||
![]() | SAE 8 STEEL | 150,000 psi | MEDIUM CARBON ALLOY | 14 | 29 | 47 | 78 | 119 | 169 | 230 | 380 | 600 | 900 | |||||||
![]() | SOCKET SET SCREW | 212,000 psi | HIGH CARBON QUENCHED TEMPERED | 9* | 16* | 30* | 70* | 140* | 18 | 29 | 43 | 63 | 100 | 146 | ||||||
![]() | STUDS | Use SAE 2,5 and 8 values when grade is known, with nut of sufficient strength. |
* Torque values in in-lbs.