SAE Bolt Torque Chart

Flange Size	Bolt Size UNC	(Min) lb-ft (Max.)	(Min) N˙m (Max)
1/2"	5/16-18	(15) — (23)	(20) — (30)
3/4"	3/8-16	(21) — (40)	(28) — (55)
1"	3/8-16	(27) — (40)	(37) — (55)
1-1/4"	7/16-14	(35) — (63)	(47) — (85)
1-1/2"	1/2-13	(46) — (97)	(62) — (130)
2"	1/2-13	(55) — (97)	(73) — (130)
2-1/2"	1/2-13	(80) — (97)	(105) — (130)
3"	5/8-11	(115) — (195)	(160) — (265)
3-1/2"	5/8-11	(115) — (195)	(160) — (265)
4"	5/8-11	(115) — (195)	(160) — (265)
5"	5/8-11	(115) — (195)	(160) — (265)