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General Torque Specifications
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
thread
diameter
(Standard
(mm)
6
10 [14]
7
16 [22]
8
23 [32]
10
46 [60]
12
80 [125]
14
125 [155]
16
200 [240]
18
275 [330]
Maintenance & Specifications
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]
Newton
Foot
Meters
Pounds
(Standard
Torque)
Torque)
7 [10]
12 [16]
17 [24]
34 [47]
60 [75]
90 [115]
150 [180]
205 [245]
SAE
UNF
SIZE
1/4-28
5/16-24
3/8-24
7/16-20
1/2-20
9/16-18
5/8-18
3/4-16
7/8-14
1-14
1-1/8-12
1-1/4-12
1-3/8-12
1-1/2-12
Nominal
Thread
Diameter
(mm)
20
24
27
30
33
36
39
SAE
SAE
Grade 2
Grade 5
5 [6]
7 [9]
9 [11]
14 [17]
17 [21]
25 [31]
27 [34]
40 [50]
40 [50]
65 [81]
60 [75]
90 [112]
85 [106]
130 [162]
150 [188]
220 [275]
140 [175]
360 [450]
210 [263]
540 [675]
300 [375]
660 [825]
420 [525]
920 [1150]
560 [700]
1260[1575]
730 [912]
1640[2050]
Newton
Meters
(Standard
Torque)
385 [450]
670 [775]
980 [1105]
1330 [1470]
1790 [1950]
2325 [2515]
3010 [3210]
Chapter 4
SAE
Grade 8
10 [12]
20 [25]
35 [44]
60 [75]
90 [112]
130 [162]
180 [225]
320 [400]
500 [625]
760 [950]
1080 [1350]
1500 [1875]
2010 [2512]
2660 [3325]
Foot
Pounds
(Standard
Torque
290 [335]
500 [625]
730 [825]
990 [1090]
1340 [1450]
1730 [1870]
2240 [2380]
4-1
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