High-Strength Metric Class 10.9 Steel Hex Head Screws

Product Description:

Choose these Class 10.9 steel screws for high-stress applications, such as valves, pumps, motors, and automotive suspension systems.

They are at least 25% stronger than medium-strength steel screws.

Dimensions meet ISO (formerly DIN) or DIN specifications.

Length is measured from under the head.

Black ultra-corrosion-resistant-coated steel screws resist chemicals and withstand 1,000 hours of salt spray. To maintain corrosion resistance, use these screws with black ultra-corrosion-resistant-coated nuts and washers.

Match the thread spacing of mating components. Coarse threads are the industry standard; choose these screws if you don’t know the pitch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.

Mechanical and physical properties:

Product Drawing:

Hex bolt partially threaded GradeA and B
GB/T 5782-2016 & ISO 4014-2011
d	P(mm)	b (mm)			ds (mm)			k (mm)				s (mm)
					min		max	A		B		min		max
		L≤125	125＜L≤200	L＞200	A	B		min	max	min	max	A	B
M1.6	0.35	9	15	28	1.46	1.35	1.6	0.975	1.225	0.9	1.3	3.02	2.9	3.2
M2	0.4	10	16	29	1.86	1.75	2	1.275	1.525	1.2	1.6	3.82	3.7	4
M2.5	0.45	11	17	30	2.36	2.25	2.5	1.575	1.825	1.5	1.9	4.82	4.7	5
M3	0.5	12	18	31	2.86	2.75	3	1.875	2.125	1.8	2.2	5.32	5.2	5.5
M3.5	0.6	13	19	32	3.32	3.2	3.5	2.275	2.525	2.2	2.6	5.82	5.7	6
M4	0.7	14	20	33	3.82	3.7	4	2.675	2.925	2.6	3	6.78	6.64	7
M5	0.8	16	22	35	4.82	4.7	5	3.35	3.65	3.26	3.74	7.78	7.64	8
M6	1	18	24	37	5.82	5.7	6	3.85	4.15	3.76	4.24	9.78	9.64	10
M8	1.25	22	28	41	7.78	7.64	8	5.15	5.45	5.06	5.54	12.73	12.57	13
M10	1.5	26	32	45	9.78	9.64	10	6.22	6.58	6.11	6.69	15.73	15.57	16
M12	1.75	30	36	49	11.73	11.57	12	7.32	7.68	7.21	7.79	17.73	17.57	18
M14	2	34	40	53	13.73	13.57	14	8.62	8.98	8.51	9.09	20.67	20.16	21
M16	2	38	44	57	15.73	15.57	16	9.82	10.18	9.71	10.29	23.67	23.16	24
M18	2.5	42	48	61	17.73	17.57	18	11.285	11.715	11.15	11.85	26.67	26.16	27
M20	2.5	46	52	65	19.67	19.48	20	12.285	12.715	12.15	12.85	29.67	29.16	30
M22	2.5	50	56	69	21.67	21.48	22	13.785	14.215	13.65	14.35	33.38	33	34
M24	3	54	60	73	23.67	23.48	24	14.785	15.215	14.65	15.35	35.38	35	36
M27	3	60	66	79	/	26.48	27	/	/	16.65	17.35	/	40	41
M30	3.5	66	72	85	/	29.48	30	/	/	18.28	19.12	/	45	46
M33	3.5	/	78	91	/	32.38	33	/	/	20.58	21.42	/	49	50
M36	4	/	84	97	/	35.38	36	/	/	22.08	22.92	/	53.8	55
M39	4	/	90	103	/	38.38	39	/	/	24.58	25.42	/	58.8	60
M42	4.5	/	96	109	/	41.38	42	/	/	25.58	26.42	/	63.1	65
M45	4.5	/	102	115	/	44.38	45	/	/	27.58	28.42	/	68.1	70
M48	5	/	108	121	/	47.38	48	/	/	29.58	30.42	/	73.1	75
M52	5	/	116	129	/	51.26	52	/	/	32.5	33.5	/	78.1	80
M56	5.5	/	/	137	/	55.26	56	/	/	34.5	35.5	/	82.8	85
M60	5.5	/	/	145	/	59.26	60	/	/	37.5	38.5	/	87.8	90
M64	6	/	/	153	/	63.26	64	/	/	39.5	40.5	/	92.8	95

Production Workshop:

Product Warehouse: