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General Torque Specifications
(rev. 4/97)
This chart provides tightening torques for general purpose applications when special torques are not specified on process or drawing. Assembly
torques apply to plated nuts and capscrews assembled without supplemental lubrication (as received condition). They do not apply if special
graphite moly-disulfide or other extreme pressure lubricants are used. When fasteners are dry (solvent cleaned) add 33% to as received condition
torque. Bolt head identification marks indicate grade and may vary from manufacturer to manufacturer. Thick nuts must be used on grade 8
capscrews. Use value in [ ] if using prevailing torque nuts
TORQUE SPECIFIED IN FOOT POUNDS
UNC
SAE
SIZE
Grade 2
1/4-20
4
[5]
5/16-18
8
[10]
3/8-16
15 [19]
7/16-14
24 [30]
1/2-13
35 [43]
9/16-12
55 [62]
5/8-11
75 [94]
3/4/10
130 [162]
7/8-9
125 [156]
1-8
190 [237]
1-1/8-7
270 [337]
1-1/4-7
380 [475]
1-3/8-6
490 [612]
1-1/2-6
650 [812]
METRIC:
Coarse thread metric class 10.9 fasteners and class 10.0 nuts and through hardened flat washers, phosphate coated, Rockwell "C" 38-45. Use
value in [ ] if using prevailing torque nuts
Nominal
Newton Meters
thread
(Standard
diameter (mm)
Torque)
6
10 [14]
7
16 [22]
8
23 [32]
10
46 [60]
12
80 [125]
14
125 [155]
16
200 [240]
18
275 [330]
4-1
TABLE OF CONTENTS
SAE
SAE
Grade 5
Grade 8
6
[7]
9 [11]
13 [13]
18 [22]
23 [29]
35 [42]
35 [43]
55 [62]
55 [62]
80 [100]
80 [100]
110 [137]
110 [137]
170 [212]
200 [250]
280 [350]
320 [400]
460 [575]
408 [506]
680 [850]
600 [750]
960 [1200]
840 [1050
1426 [1782]
1010 [1375]
1780 [2225]
1460 [1825]
2360 [2950]
Foot Pounds
(Standard
Torque)
7 [10]
12 [16]
17 [24]
34 [47]
60 [75]
90 [115]
150 [180]
205 [245]
UNF
SAE
SIZE
Grade 2
1/4-28
5 [6]
5/16-24
9 [11]
3/8-24
17 [21]
7/16-20
27 [34]
1/2-20
40 [50]
9/16-18
60 [75]
5/8-18
85 [106]
3/4-16
150 [188]
7/8-14
140 [175]
1-14
210 [263]
1-1/8-12
300 [375]
1-1/4-12
420 [525]
1-3/8-12
560 [700]
1-1/2-12
730 [912]
Newton Meters
Nominal Thread
(Standard
Diameter (mm)
20
385 [450]
24
670 [775]
27
980 [1105]
30
1330 [1470]
33
1790 [1950]
36
2325 [2515]
39
3010 [3210]
Chapter 4
Maintenance
SAE
SAE
Grade 5
Grade 8
7 [9]
10 [12]
14 [17]
20 [25]
25 [31]
35 [44]
40 [50]
60 [75]
65 [81]
90 [112]
90 [112]
130 [162]
130 [162]
180 [225]
220 [275]
320 [400]
360 [450]
500 [625]
540 [675]
760 [950]
660 [825]
1080 [1350]
920 [1150]
1500 [1875]
1260[1575]
2010 [2512]
1640[2050]
2660 [3325]
Foot Pounds
(Standard
Torque)
Torque
290 [335]
500 [625]
730 [825]
990 [1090]
1340 [1450]
1730 [1870]
2240 [2380]
F-1108-0121
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