BS 4882 to ASTM A193 Grade B7 Specifications

Nominal Size		Tap-End Full Thread Length, B_M	Nut-End Thread Length, B _min			U_max = 2P	Nominal Length, L
Nominal Size			L ≤ 125	125 < L ≤ 200	L > 200		Nominal Length, L
Diameter, D	Pitch, P		Min.	Min.	Min.		Range	Increments
M6	1	8.55-9.45	18	24	...	2	25-90	5
M6	1	8.55-9.45	18	24	...	2	100-160	10
M8	1.25	11.45-12.55	18	24	...	2.5	25-90	5
							100-160	10
							≥ 180	20
M10	1.5	14.45-15.55	26	32	45	3	35-160	10
M10	1.5	14.45-15.55	26	32	45	3	≥ 180	20
M12	1.75	17.45-18.55	30	36	49	3.5	40-160	10
M12	1.75	17.45-18.55	30	36	49	3.5	≥ 180	20
M14	2	20.35-21.65	34	40	53	4	50-160	10
M14	2	20.35-21.65	34	40	53	4	≥ 180	20
M16	2	23.55-24.65	38	44	57	4	60-160	10
M16	2	23.55-24.65	38	44	57	4	≥ 180	20
M20	2.5	29.35-30.65	46	52	65	5	70-160	10
M20	2.5	29.35-30.65	46	52	65	5	≥ 180	20
M24	3	35.2-36.8	54	60	73	6	80-160	10
M24	3	35.2-36.8	54	60	73	6	≥ 180	20
M30	3.5	43.75-46.25	66	72	85	7	90-160	10
M30	3.5	43.75-46.25	66	72	85	7	≥ 180	20
M36	4	52.5-55.5	78	84	97	8	≥ 100	20
M42	4.5	61.5-64.5	90	96	109	9	≥ 120	20
M48	5	70.5-73.5	...	108	121	10	≥ 140	20
M56	5.5	82.25-85.75	...	124	137	11	≥ 160	20
M64	6	94.5-97.5	...	140	153	12	≥ 180	20
M72	6	106.5-109.5	...	156	169	12	≥ 200	20
M80	6	118.5-121.5	...	...	185	12	≥ 240	20
M90	6	133-137	...	...	205	12	≥ 260	20
M100	6	148-152	...	...	225	12	≥ 280	20

BS 4882