TM 5-3895-383-24
1-14. ADDITIONAL MAINTENANCE INSTRUCTIONS
Maintenance Section
Torque Specifications
General Torque Information
SMCS Code: 1000; 7000; 7553
Mismatched or incorrect fasteners can result in damage or
malfunction, or possible injury.
Take care to avoid mixing metric dimensioned fasteners
and inch dimensioned fasteners.
Exceptions to these torques are given in the Service Manual, if
necessary.
Prior to installation of any hardware, ensure that components
are in near new condition. Bolts and threads must be worn or
damaged. Threads must not have burrs or nicks. Hardware
must be free of rust and corrosion. Clean the hardware with a
noncorrosive cleaner. Do not lubricate the fastener threads
except for the rust preventive. The rust preventive should be
applied by the supplier of that component for purposes of
shipping and storage. Other applications for lubricating
components may also be specified in the Service Manual.
Standard Torque for Inch
Fasteners
SMCS Code: 1000; 7000; 7553
Table 7
Inch Nuts and Bolts
Thread Size
Inch
Standard Torque
1/4
12 ± 3 N m (6 ± 2 lb-ft)
5/16
25 ± 6 N m(18 ± 4 lb ft)
3/8
47 ± 9 N m (35 ± 7 lb-ft)
7/16
70 ± 15 N m (50 ± 11 lb-ft)
1/2
105 ± 20 N m (75 ± 15 lb-ft)
9/16
160 ± 30 N m (120 ± 22 lb-ft)
5/8
215 ± 40 N m (160 ± 30 lb-ft)
3/4
370 ± 50 N m (275 ± 37 lb-ft)
7/8
620 ± 80 N m (460 ± 60 lb-ft)
1
900 ± 100 N m (660 ± 75 lb-ft)
1 1/8
1300 ± 150 N m (960 ± 110 lb-ft)
1 1/4
1800 ± 200 N m (1320 ± 150 lb-ft)
1 3/8
2400 ± 300 N m (1780 ± 260 lb-ft)
1 1/2
3100 ± 350 N m (2280 ± 260 lb-ft)
Table 8
Inch Taperlock Studs
Thread Size
Inch
Standard Torque
1/4
8 ± 3 N m (6 ± 2 lb-ft)
5/16
17 ± 5Nm(13 ± 4 lb ft)
3/8
35 ± 5 N m (26 ± 4 lb-ft)
7/16
45 ± 10 N m (33 ± 7 lb-ft)
1/2
65 ± 10 N m (48 ± 7 lb-ft)
5/8
110 ± 20 N m (80 ± 15 lb-ft)
3/4
170 ± 30 N m (125 ± 22 lb-ft)
7/8
260 ± 40 N m (190 ± 30 lb-ft)
1
400 ± 60 N m (300 ± 44 lb-ft)
1 1/8
525 ± 60 N m (390 ± 44 lb-ft)
1 1/4
750 ± 80 N m (550 ± 60 lb-ft)
1 3/8
950 ± 125 N m (700 ± 90 lb-ft)
1 1/2
1200 ± 150 N m (880 ± 110 lb-ft)
Maintenance Section
Torque Specifications
1-19
