ASME B18.2.1 Hex Bolts

Nominal Size	E		F		G		H		R		LT
	Body Dia		Across Flats		Across Corners		Height		Radius of Fillet		Thread Length for Bolt Lengths
	Max	Min	Max	Min	Max	Min	Max	Min	Max	Min	6’’and Shorter	Over 6’’
1/4"	6.6	6.02	11.12	10.8	12.82	12.3	4.77	3.81	0.76	0.26	19.05	25.4
5/16"	8.23	7.57	12.7	12.3	14.65	14.03	5.96	4.96			22.23	28.58
3/8"	9.85	9.15	14.27	13.82	16.51	15.75	6.8	5.75			25.4	31.75
7/16"	11.48	10.7	15.87	15.32	18.33	17.45	8.02	6.91			28.58	34.93
1/2"	13.08	12.25	19.05	18.42	21.99	20.99	9.24	7.68			31.75	38.1
5/8"	16.3	15.37	23.82	23.02	27.5	26.24	11.27	9.61	1.52	0.51	38.1	44.45
3/4"	19.5	18.52	28.57	27.64	32.99	31.5	13.3	11.56			44.45	50.8
7/8"	22.73	21.65	33.32	32.24	38.5	36.76	15.34	13.49			50.8	57.15
1"	25.95	24.79	38.1	36.83	43.99	41.99	17.78	15.02	2.28	0.77	57.15	63.5
1 1/8"	29.18	27.89	42.87	41.43	49.5	47.22	19.81	16.72			63.5	69.85
1 1/4"	32.43	31.07	47.62	46.03	57.99	52.48	22.25	19.03			69.85	76.2
1 3/8"	35.66	34.17	52.37	50.65	60.5	57.74	23.87	20.58			76.2	82.55
1 1/2"	38.88	37.34	57.15	55.25	65.98	63	26.31	22.92			82.55	88.9
1 5/8"	42.11	40.42	61.92	59.85	71.5	66.45	28.34	24.85			88.9	95.25
1 3/4"	45.33	43.59	66.67	64.47	76.98	73.49	30.37	26.78	304	1.02	95.25	101.6
1 7/8"	48.56	46.72	71.42	69.07	82.49	78.72	32.41	28.71			101.6	107.95
2"	51.79	49.89	76.2	73.66	87.98	83.98	35.25	29.85			107.95	114.3
2 1/4"	58.54	56.24	85.72	82.86	98.98	94.47	39.31	33.71	4.82	1.53	120.65	127
2 1/2"	64.99	62.51	95.25	92.08	109.98	104.98	43.38	37.57			133.35	139.7
2 3/4"	71.8	68.86	104.77	101.3	120.98	115.47	47.47	41.46			146.05	152.4
3"	78.25	75.21	114.3	110.49	131.97	125.96	52.32	46.11			158.75	165.1
3 1/4"	84.7	81.54	123.82	119.69	142.97	136.45	57.17	49.18			171.45	177.8
3 1/2"	91.16	87.91	133.35	128.91	153.97	146.97	60.45	52.25			184.15	190.5
3 1/4"	97.99	94.64	142.87	138.1	164.97	157.43	65.32	56.93			196.85	203.2
4"	104.41	100.97	152.4	147.32	175.97	167.95	70.2	61.57			209.55	215.9