Metric Bolt and Cap Screw Torque Values
TORQ2-UN-15APR13
Top, Property Class and Head Markings; Bottom, Property Class and Nut Markings
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Class 4.8 |
Class 8.8 or 9.8 |
Class 10.9 |
Class 12.9 |
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|---|---|---|---|---|---|---|---|---|
|
Size |
Lubricateda N˙m(lb-ft) |
Dryb N˙m(lb-ft) |
Lubricateda N˙m(lb-ft) |
Dryb N˙m(lb-ft) |
Lubricateda N˙m(lb-ft) |
Dryb N˙m(lb-ft) |
Lubricateda N˙m(lb-ft) |
Dryb N˙m(lb-ft) |
|
M6 |
4.7 (3.5) |
6 (4.4) |
9 (6.6) |
11.5 (8.5) |
13 (9.5) |
16.5 (12.2) |
15.5 (11.5) |
19.5 (14.5) |
|
M8 |
11.5 (8.5) |
14.5 (10.7) |
22 (16) |
28 (20.5) |
32 (23.5) |
40 (29.5) |
37 (27.5) |
47 (35) |
|
M10 |
23 (17) |
29 (21) |
43 (32) |
55 (40) |
63 (46) |
80 (59) |
75 (55) |
95 (70) |
|
M12 |
40 (29.5) |
50 (37) |
75 (55) |
95 (70) |
110 (80) |
140 (105) |
130 (95) |
165 (120) |
|
M14 |
63 (46) |
80 (59) |
120 (88) |
150 (110) |
175 (130) |
220 (165) |
205 (150) |
260 (190) |
|
M16 |
100 (74) |
125 (92) |
190 (140) |
240 (175) |
275 (200) |
350 (255) |
320 (235) |
400 (300) |
|
M18 |
135 (100) |
170 (125) |
265 (195) |
330 (245) |
375 (275) |
475 (350) |
440 (325) |
560 (410) |
|
M20 |
190 (140) |
245 (180) |
375 (275) |
475 (350) |
530 (390) |
675 (500) |
625 (460) |
790 (580) |
|
M22 |
265 (195) |
330 (245) |
510 (375) |
650 (480) |
725 (535) |
920 (680) |
850 (625) |
1080 (800) |
|
M24 |
330 (245) |
425 (315) |
650 (480) |
820 (600) |
920 (680) |
1150 (850) |
1080 (800) |
1350 (1000) |
|
M27 |
490 (360) |
625 (460) |
950 (700) |
1200 (885) |
1350 (1000) |
1700 (1250) |
1580 (1160) |
2000 (1475) |
|
M30 |
660 (490) |
850 (625) |
1290 (950) |
1630 (1200) |
1850 (1350) |
2300 (1700) |
2140 (1580) |
2700 (2000) |
|
M33 |
900 (665) |
1150 (850) |
1750 (1300) |
2200 (1625) |
2500 (1850) |
3150 (2325) |
2900 (2150) |
3700 (2730) |
|
M36 |
1150 (850) |
1450 (1075) |
2250 (1650) |
2850 (2100) |
3200 (2350) |
4050 (3000) |
3750 (2770) |
4750 (3500) |
|
a "Lubricated" means coated with a lubricant such as engine oil, or fasteners with phosphate and oil coatings. |
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b "Dry" means plain or zinc plated without any lubrication. |
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DO NOT use these values if a different torque value or tightening procedure is given for a specific application. Torque values listed are for general use only. Check tightness of fasteners periodically. |
Make sure fastener threads are clean and that you properly start thread engagement. This will prevent them from failing when tightening. |
|
Shear bolts are designed to fail under predetermined loads. Always replace shear bolts with identical property class. |
Tighten plastic insert or crimped steel-type lock nuts to approximately 50 percent of the dry torque shown in the chart, applied to the nut, not to the bolt head. Tighten toothed or serrated-type lock nuts to the full torque value. |
|
Fasteners should be replaced with the same or higher property class. If higher property class fasteners are used, these should only be tightened to the strength of the original. |
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PY80265,05GO999-19-20050910 |