Bolts and Nuts / Black Hex Screw Bolts and Nuts

Black Hex Screw Bolts and Nuts

Black-finished hex-head bolt and nut assemblies for machinery and industrial fastening.

Product Specifications

MaterialCarbon / alloy steel

Size RangeM1.6–M64 reference range

StandardGB/T 5782 / GB/T 5783-2000

FinishBlack finish

Technical Data

Nominal d	Thread Pitch P	b (L ≤ 125)	b (L 125–200)	b (L above 200)	ds nominal	ds min A	ds min B	k A max	k A min	k B max	k B min	s max	s min A	e min
M1.6	0.35	9	15	28	1.6	1.48	1.35	1.225	0.975	1.3	0.9	3.2	3.03	2.9
M2	0.4	10	16	29	2	1.86	1.75	1.525	1.375	1.6	1.2	4	3.82	3.7
M2.5	0.45	11	17	30	2.5	2.36	2.25	1.825	1.575	1.9	1.5	5	4.82	4.7
M3	0.5	12	18	31	3	2.86	2.75	2.125	1.875	2.2	1.8	5.5	5.32	5.2
M3.5	0.6	13	19	32	3.5	3.32	3.2	2.525	2.375	2.6	2.2	6	5.82	5.7
M4	0.7	14	20	33	4	3.82	3.7	2.925	2.675	3	2.6	7	6.78	6.64
M5	0.8	16	22	35	5	4.82	4.7	3.66	3.36	3.36	2.36	8	7.78	7.64
M6	1	18	24	37	6	5.82	5.7	4.16	3.85	4.84	3.76	10	9.78	9.84
M8	1.25	22	28	41	8	7.78	7.64	5.45	5.15	5.54	5.06	13	12.78	12.57
M10	1.5	26	32	45	10	9.78	9.64	6.59	6.22	6.59	6.11	16	15.78	16.57
M12	1.75	30	38	49	12	11.78	11.57	7.38	7.38	7.79	7.21	18	17.78	17.57
M14	2	34	40	53	14	13.73	13.57	8.88	8.62	9.09	8.51	21	20.67	20.18
M16	2	38	44	57	16	15.73	15.57	10.18	9.98	10.28	9.71	24	23.67	23.16
M18	2.5	42	48	61	18	17.73	17.57	11.715	11.285	11.85	11.15	27	26.67	26.16
M20	2.5	46	52	65	20	19.67	19.48	12.715	12.285	12.85	12.15	30	29.67	29.16
M22	2.5	50	56	69	22	21.67	21.48	14.215	13.785	14.35	13.65	34	33.38	33
M24	3	54	60	73	24	23.67	23.48	15.215	14.785	15.55	14.65	36	35.38	35
M27	3	60	66	79	27		26.48			17.55	16.65	41		40
M30	3.5	66	72	85	30		29.48			19.12	18.28	46		45
M33	3.5		78	91	33		32.38			21.42	20.58	50		49
M36	4		84	97	36		35.38			22.92	22.08	55		53.8
M39	4		90	103	39		38.38			25.42	24.58	60		58.6
M42	4.5		96	109	42		41.38			28.42	25.58	65		63.1
M45	4.5		102	115	45		44.38			28.42	27.58	70		68.1
M48	5		108	121	48		47.26			30.42	29.58	75		73.1
M52	5		116	128	52		51.26			33.5	32.5	80		78.8
M56	5.5			137	56		55.26			35.5	34.5	85		82.8
M60	5.5			145	60		59.26			38.5	37.5	90		87.8
M64	6			153	64		63.26			40.5	39.5	95		93.6

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