ASME B18.2.3.5M Hex Bolts

Nominal Bolt Dia., D and Thread Pitch	Body Diameter, D_s		Width Across Flats, S		Width Across Corners, E		Head Height, K		Wrenching Height, K₁	For Bolt Lengths
	Body Diameter, D_s		Width Across Flats, S		Width Across Corners, E		Head Height, K		Wrenching Height, K₁	< 125 mm	> 125 and < 200 mm	< 200 mm
	Max	Min	Max	Min	Max	Min	Max	Min	Min	Basic Thread Length, a B
ANSI B18.2.3.5M - M5 × 0.8	5.48	4.52	8	7.64	9.24	8.63	3.58	3.35	2.4	16	22	35
ANSI B18.2.3.5M - M6 × 1	6.19	5.52	10	9.64	11.55	10.89	4.38	3.55	2.8	18	24	37
ANSI B18.2.3.5M - M8 × 1.25	8.58	7.42	13	12.57	15.01	14.2	5.68	5.1	3.7	22	28	41
ANSI B18.2.3.5M - ^bM10 × 1.5	10.58	9.42	15	14.57	17.32	16.46	6.85	6.17	4.5	26	32	45
ANSI B18.2.3.5M - M10 × 1.5	10.58	9.42	16	15.57	18.48	17.59	6.85	6.17	4.5	26	32	45
ANSI B18.2.3.5M - M12 × 1.75	12.7	11.3	18	17.57	20.78	19.85	7.95	7.24	5.2	30	36	49
ANSI B18.2.3.5M - M14 × 2	14.7	13.3	21	20.16	24.25	22.78	9.25	8.51	6.2	34	40	53
ANSI B18.2.3.5M - M16 × 2	16.7	15.3	24	23.16	27.71	26.17	10.75	9.68	7	38	44	57
ANSI B18.2.3.5M - M20 × 2.5	20.84	19.16	30	29.16	34.64	32.95	13.4	12.12	8.8	46	52	65
ANSI B18.2.3.5M - M24 × 3	24.84	23.16	36	35	41.57	39.55	15.9	14.56	10.5	54	60	73
ANSI B18.2.3.5M - M30 × 3.5	30.84	29.16	46	45	53.12	50.55	19.75	17.92	13.1	66	72	85
ANSI B18.2.3.5M - M36 × 4	37	35	55	53.8	63.51	60.79	23.55	21.72	15.8	78	84	97
ANSI B18.2.3.5M - M42 × 4.5	43	41	65	62.9	75.06	71.71	27.05	25.03	18.2	90	96	109
ANSI B18.2.3.5M - M48 × 5	49	47	75	72.6	86.6	82.76	31.07	28.93	21	102	108	121
ANSI B18.2.3.5M - M56 × 5.5	57.2	54.8	85	82.2	98.15	93.71	36.2	33.8	24.5	...	124	137
ANSI B18.2.3.5M - M64 × 6	65.52	62.8	95	91.8	109.7	104.65	41.32	38.68	28	...	140	153
ANSI B18.2.3.5M - M72 × 6	73.84	70.8	105	101.4	121.24	115.6	46.45	43.55	31.5	...	156	169
ANSI B18.2.3.5M - M80 × 6	82.16	78.8	115	111	132.79	126.54	51.58	48.42	35	...	172	185
ANSI B18.2.3.5M - M90 × 6	92.48	88.6	130	125.5	150.11	143.07	57.74	54.26	39.2	...	192	205
ANSI B18.2.3.5M - M100 × 6	102.8	98.6	145	140	167.43	159.6	63.9	60.1	43.4	...	212	225
a Basic thread length, B, is a reference dimension. b Thissize with width across flats of 15 mm is not standard. Unless specifically ordered, M10 hex bolts with 16 mm width across flats will be furnished. All dimensions are in millimeters.