Product description

Alloy Steel Socket Head Screws

With a tensile strength of 170,000 psi(1200Mpa), these alloy steel screws are stronger than Grade 10.9 steel screws. Length is measured from under the head.

Black-oxide steel screws are mildly corrosion resistant in dry environments. Zinc-plated steel screws resist corrosion in wet environments. The screws with a blue-dyed finish are easy to distinguish. Zinc-flake-coated steel screws are 20 times as corrosion resistant as zinc-plated screws and comparable to Dacromet-coated screws. Zinc-aluminum-coated steel screws are 40 times as corrosion resistant as zinc-plated screws and comparable to Magni-coated screws. They withstand 1,000 hours of salt spray per ASTM B117.

Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance. They are not compatible with coarse threads.

Screws that meet ASTM A574, ASTM A574M, and ISO 898-1 comply with specifications and testing requirements for material quality. Screws that meet ASME B18.3, ASME B18.3M, ISO 21269, and ISO 4762 (formerly DIN 912) comply with specifications for dimensional standards.

Product Features:

Product Drawing:

Hexagon socket head cap screws
DIN 912-1983
d(mm)	P(mm)	b(mm)	dk(mm)		k(mm)		s(mm)		t(mm)
			min	max	min	max	min	max	min
M1.4	0.3	14	2.46	2.74	1.26	1.4	1.32	1.36	0.6
M1.6	0.35	15	2.86	3.14	1.46	1.6	1.52	1.56	0.7
M2	0.4	16	3.62	3.98	1.86	2	1.52	1.56	1
M2.5	0.45	17	4.32	4.68	2.36	2.5	2.02	2.06	1.1
M3	0.5	18	5.32	5.68	2.86	3	2.52	2.58	1.3
M4	0.7	20	6.78	7.22	3.82	4	3.02	3.08	2
M5	0.8	22	8.28	8.72	4.82	5	4.02	4.095	2.5
M6	1	24	9.78	10.22	5.7	6	5.02	5.14	3
M8	1.25/1	28	12.73	13.27	7.64	8	6.02	6.14	4
M10	1.5/1.25/1	32	15.73	16.27	9.64	10	8.025	8.175	5
M12	1.75/1.5/1.25	36	17.73	18.27	11.57	12	10.025	10.18	6
M14	2/1.5	40	20.67	21.33	13.57	14	12.032	12.21	7
M16	2/1.5	44	23.67	24.33	15.57	16	14.032	14.21	8
M18	2.5/2/1.5	48	26.67	27.33	17.57	18	14.032	14.21	9
M20	2.5/2/1.5	52	29.67	30.33	19.48	20	17.05	17.23	10
M22	2.5/2/1.5	56	32.61	33.39	21.48	22	17.05	17.23	11
M24	3/2	60	35.61	36.39	23.48	24	19.065	19.28	12
M27	3/2	66	39.61	40.39	26.48	27	19.065	19.28	13.5
M30	3.5/2	72	44.61	45.39	29.48	30	22.065	22.28	15.5
M33	3.5/2	78	49.61	50.39	32.38	33	24.065	24.28	18
M36	4/3	84	53.54	54.46	35.38	36	27.065	27.28	19
M42	4.5/3	96	62.54	63.46	41.38	42	32.08	32.33	24
M48	5/3	108	71.54	72.46	47.38	48	36.08	36.33	28
M56	5.5/4	124	83.46	84.54	56.26	57	41.08	41.33	34
M64	6/4	140	95.46	96.54	63.26	64	46.08	46.33	38
M72*4	6/4	156	107.5	108.5	71.26	72	55.1	55.4	43
M80*4	6/4	172	119.5	120.5	79.26	80	65.1	65.4	48
M90*4	6/4	192	134.4	135.6	89.13	90	75.1	75.4	54
M100*4	6/4	212	149.4	150.6	99.13	100	85.12	85.47	60

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