Torque Figures

Torque figures for bolts and screws with metric thread and head dimensions, as in DIN 912, 931, 934 etc.
The figures MA in this table include:
          a)coefficient of friction microns total + 0.14
          b)90% of minimum elongation
          c)torque figures when assembling fasteners

The coefficient of friction of microns total = 0.14 applies for fasteners without coating (self colour) when slighty lubricated.
Additional lubrication of the thread will substantially alter the coefficient of friction, leading to uncontrollable pre-load situations.
Pre-load situations will also be influenced by the fastening methods and tools used.
The following figures are guidelines only.
Figures in NM(Newton Meters)

Tightening Torques

(For Metric Coarse Thread Bolts and Screws) Based on coefficients of friction ľ total of 0.100

Thread Diameter	Property Classes
Thread Diameter	4.6	5.6	8.8	10.9	12.9
M4	1.02	1.37	3.0	4.4	5
M5	2.00	2.70	5.9	8.7	10
M6	3.50	4.60	10	15	18
M8	8.40	11	25	36	43
M10	17	22	49	72	84
M12	29	39	85	125	145
M14	46	62	135	200	235
M16	71	95	210	310	365
M18	97	130	300	430	500
M20	138	184	425	610	710
M22	186	250	580	820	960
M24	235	315	730	1,050	1,220
M27	350	470	1,100	1,550	1,800
M30	475	3635	1,450	2,100	2,450
M33	645	8865	1,970	2,770	3,330
M36	830	1,111	2,530	3,560	4,280

Tightening Torques

(For Metric Fine Thread Bolts and Screws) Based on coefficients of friction ľ total of 0.100

Thread Diameter	Tightening Torque M_A max (Nm)
	Property Classes
	8.8	10.9	12.9
M8 x 1.00	22	30	36
M10 x 1.25	42	59	71
M12 x 1.25	76	105	130
M14 x 1.50	120	165	200
M16 x 1.50	180	250	300
M18 x 1.50	260	365	435
M20 x 1.50	360	510	610
M22 x 1.50	480	680	810
M24 x 2.00	610	860	1,050

Conversion Figures
To get NCM from Nm     Nm x 100
To get inch pounds from Ncm     Ncm x 0.08851
To get foot pounds from Ncm     Ncm x 0.00737
To get foot pounds from NM     Nm x 0.7376

*All information is strictly informative