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Pride in Craftsmanship

US Recommended Bolt Torque


Size	Recommended Torque for Bolts with No Lubrication Applied to Threads
	Grade 5		Grade 8		18-8 S/S		Bronze		Brass
	Coarse	Fine	Coarse	Fine	Coarse	Fine	Coarse	Fine	Coarse	Fine
#4*	-	-	-	-	5.2	-	4.8	-	4.3	-
#6*	-	-	-	-	9.6	-	8.9	-	7.9	-
#8*	-	-	-	-	19.8	-	18.4	-	16.2	-
#10*	-	-	-	-	22.8	31.7	21.2	29.3	18.6	25.9
1/4	8	10	12	14	6.3	7.8	5.7	7.3	5.1	6.4
5/16	17	19	24	27	11	11.8	10.3	10.9	8.9	9.7
3/8	31	35	44	49	20	22	18	20	16	18
7/16	49	55	70	78	31	33	29	31	26	27
1/2	75	85	105	120	43	45	40	42	35	37
9/16	110	120	155	170	57	63	53	58	47	51
5/8	150	170	284	323	93	104	86	96	76	85
3/4	270	295	510	568	128	124	104	102	118	115
7/8	395	435	813	902	194	193	178	178	159	158
1	590	660	905	1030	287	289	265	240	235	212
* Sizes from 4 to 10 are in in.-lbs. Sizes from 1/4 up are in Ft. -lbs.