Metric Bolts - Tightening Torques

Maximum recommended tightening torque for coarse threaded metric steel bolts:

Size (mm)	Typical Maximum Tightening Torque (Nm)
	Property Class
	Grade 8.8	Grade 9.8	Grade 10.9	Grade 12.9
M5	7.0	7.8	10.0	11.7
M6	11.8	13.3	17.0	19.9
M8	28.8	32.3	41.3	48.3
M10	57.3	64.1	81.8	95.7
M12	99.8	112	143	167
M16	248	277	354	413
M20	500		690	809
M24	865		1195	1395
M30	1719		2377	2774

• coarse threaded
• lightly oiled threads
• tension 85% of proof load
• Bolt Torque Calculator
• US Bolts - Tightening Torques

• Reduced Torque with Lubricated Bolts

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