General Torque Specifications
(rev. 4/97)
Table 3-1: General Torque Specifications
TORQUE SPECIFIED IN FOOT POUNDS -
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 cap-screws
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 cap-screws. Use value in [ ] if using prevailing torque nuts.
UNC
SIZE
SAE
Grade 2
SAE
Grade 5
SAE
Grade 8
UNF
SIZE
SAE
Grade 2
SAE
Grade 5
SAE
Grade 8
1/4-20
4 [5]
6 [7]
9 [11]
1/4-28
5 [6]
7 [9]
10 [12]
5/16-18
8 [10]
13 [13]
18 [22]
5/16-24
9 [11]
14 [17]
20 [25]
3/8-16
15 [19]
23 [29]
35 [42]
3/8-24
17 [21]
25 [31]
35 [44]
7/16-14
24 [30]
35 [43]
55 [62]
7/16-20
27 [34]
40 [50]
60 [75]
1/2-13
35 [43]
55 [62]
80 [100]
1/2-20
40 [50]
65 [81]
90 [112]
9/16-12
55 [62]
80 [100]
110 [137]
9/16-18
60 [75]
90 [112]
130 [162]
5/8-11
75 [94]
110 [137]
170 [212]
5/8-18
85 [106]
130 [162]
180 [225]
3/4/10
130 [162]
200 [250]
280 [350]
3/4-16
150 [188]
220 [275]
320 [400]
7/8-9
125 [156]
320 [400]
460 [575]
7/8-14
140 [175]
360 [450]
500 [625]
1-8
190 [237]
408 [506]
680 [850]
1-14
210 [263]
540 [675]
760 [950]
1-1/8-7
270 [337]
600 [750]
960 [1200]
1-1/8-12
300 [375]
660 [825]
1080 [1350]
1-1/4-7
380 [475]
840 [1050
1426 [1782]
1-1/4-12
420 [525]
920 [1150]
1500 [1875]
1-3/8-6
490 [612]
1010 [1375]
1780 [2225]
1-3/8-12
560 [700]
1260 [1575]
2010 [2512]
1-1/2-6
650 [812]
1460 [1825]
2360 [2950]
1-1/2-12
730 [912]
1640 [2050]
2660 [3325]
1-3/4-5
736 [920]
1651 [2063]
2678 [3347]
1-3/4-12
920 [1150]
2063 [2579]
3347 [4183]
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
(mm)
Newton
Meters
(Standard
Torque)
Foot Pounds
(Standard
Torque)
Nominal
Thread
Diameter
(mm)
Newton
Meters
(Standard
Torque)
Foot Pounds
(Standard
Torque
6
10 [14]
7 [10]
20
385 [450]
290 [335]
7
16 [22]
12 [16]
24
670 [775]
500 [625]
8
23 [32]
17 [24]
27
980 [1105]
730 [825]
10
46 [60]
34 [47]
30
1330 [1470]
990 [1090]
12
80 [125]
60 [75]
33
1790 [1950]
1340 [1450]
14
125 [155]
90 [115]
36
2325 [2515]
1730 [1870]
16
200 [240]
150 [180]
39
3010 [3210]
2240 [2380]
18
275 [330]
205 [245]
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