Metric Torque Guide - Fine Thread
Starting-point tightening torques for metric fine-pitch bolts, calculated from ISO 898-1 proof loads. Use only when no manufacturer torque is given.
Estimated torque, N·m (K = 0.20, clamp load = 75% of proof)
| Size | 8.8 | 10.9 | 12.9 |
|---|---|---|---|
| M8 x 1 | 27 | 39 | 46 |
| M10 x 1.25 | 53 | 76 | 89 |
| M10 x 1 | 56 | 80 | 94 |
| M12 x 1.25 | 96 | 140 | 160 |
| M12 x 1.5 | 92 | 130 | 155 |
| M14 x 1.5 | 150 | 215 | 255 |
| M16 x 1.5 | 235 | 335 | 390 |
| M18 x 1.5 | 350 | 485 | 565 |
| M20 x 1.5 | 490 | 675 | 790 |
| M22 x 1.5 | 660 | 910 | 1,065 |
| M24 x 2 | 830 | 1,150 | 1,340 |
| M30 x 2 | 1,675 | 2,320 | 2,710 |
T = K x d x F, F = 0.75 x proof load, K = 0.20 dry plain or zinc. Lubricated (K about 0.15): multiply by 0.75. Values rounded.
These tables carry the same figures as the printed sheet below.
The printed sheet
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Text version of this sheet
Estimated assembly torque · metric fine pitch · ISO 898-1 classes
What it is
FIELD IDENTIFICATION
Starting-point tightening torques for metric fine-pitch bolts, calculated from ISO 898-1 proof loads. Use
only when no manufacturer torque is given.
MFG
M fine
Torque values are for stated conditions only
Estimated torque, N·m (K = 0.20, clamp load = 75% of proof)
Size
8.8
10.9
12.9
M8 x 1
27
39
46
M10 x 1.25
53
76
89
M10 x 1
56
80
94
M12 x 1.25
96
140
160
M12 x 1.5
92
130
155
M14 x 1.5
150
215
255
M16 x 1.5
235
335
390
M18 x 1.5
350
485
565
M20 x 1.5
490
675
790
M22 x 1.5
660
910
1,065
M24 x 2
830
1,150
1,340
M30 x 2
1,675
2,320
2,710
T = K x d x F, F = 0.75 x proof load, K = 0.20 dry plain or zinc. Lubricated (K about 0.15): multiply by 0.75. Values rounded.
Key points
Fine threads are common on automotive and heavy-equipment parts; OEM torque always governs.
Governing standards: ISO 898-1:2013; ISO 898-2:2022. Editions shown are the latest confirmed as of September 2026. The drawing and the governing standard always take
precedence over this sheet.
torquing any fastener. Verify the current governing standard, project documents, OEM requirements, size, thread, coating and lot certification. To the fullest extent permitted by law, The Fastener App disclaims liability
arising from reliance on this reference.
Fastener Guide reference FG-5F5A1A · thefastenerapp.com/fastener-guide/technical-reference/metric-torque-guide-fine · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.
