TM55-2840-251-23
APPENDIX E (Continued)
Procedure For Applying Torque. Clean parts to be tightened in drycleaning solvent. Unless instructed otherwise, do not
lubricate parts. Torque should be applied slowly and evenly until the specified torque value is reached and then held at
this value until the nut, bolt, or screw has stopped turning.
NOTE
When no special torque values are given in an assembly and/or
installation procedure, standard torque values shall apply. All torque
values are in pound-inches. Threads shall be clean and undamaged.
Unless instructed otherwise, do not lubricate parts.
Table E-2. Standard Torque Values
STANDARD STEEL SCREWS, BOLTS, AND NUTS (POUND-INCHES)*
Thread Size
Slotted-Head Screws
Hexagon-Head Bolts and Nuts
2.56
2 to 3
(0.02 to 0.03kg/m)
3-48
3 to 4
(0.03 to 0.05kg/m)
4-40
5 to 6
(0.05 to 0.07kg/m)
5-40
6 to 7
(0.07 to 0.08kg/m)
6-32
7 to 9
(0.08 to 0.1kg/m)
8-32
10 to 12
(0.12 to 0.14kg/m)
10-32
18 to 20
40 to 45
(0.21 to 0.23kg/m)
(0.46 to 0.52kg/m)
7/32-24
22 to 25
65 to 70
(0.25 to 0.29kg/m)
(0.7 to 0.8kg/m)
1/4-28
30 to 35
70 to 95
(0.3 to 0.4kg/m)
(0.8 to 1.lkg/m)
*Metric equivalent appears in parentheses( ).
E-2
