Click Specification

(Non-preferred) dimensions in parentheses.

Hexagon Socket Countersunk Head Screws

GB /T 70.3 - 2000

Display drawing:

Download CAD Model^*

^*Models with different eras.

Calculate weight and price. Weight 1000 pcs : kg x $ per kg = $ 1000 pcs

Default density g/cm³

Nominal Length L Tips:seclect Nominal Length L and get Weight Thread length.

Screw Thread
d

M10

M12

(M14)

M16

M20

P	Pitch
b	Ref.
d_k	Theoretical	max
	Actual	min
d_s	max
	min
e ^①	min
k	max
s ^①	Nominal Size
	max	12.9
		Other
	min
t	min
Minimum tensile load(N) ^②	8.8
	10.9
	12.9

0.5	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5
18	20	22	24	28	32	36	40	44	52
6.72	8.96	11.2	13.44	17.92	22.4	26.88	30.8	33.6	40.32
5.54	7.53	9.43	11.34	15.24	19.22	23.12	26.52	29.01	36.05
3	4	5	6	8	10	12	14	16	20
2.86	3.82	4.82	5.82	7.78	9.78	11.73	13.73	15.73	19.67
2.3	2.87	3.44	4.58	5.72	6.86	9.15	11.43	11.43	13.72
1.86	2.48	3.1	3.72	4.96	6.2	7.44	8.4	8.8	10.16
2	2.5	3	4	5	6	8	10	10	12
2.045	2.56	3.071	4.084	5.084	6.095	8.115	10.115	10.115	12.142
2.060	2.58	3.080	4.095	5.140	6.140	8.175	10.175	10.175	12.212
2.020	2.52	3.020	4.020	5.020	6.020	8.025	10.025	10.025	12.032
1.1	1.5	1.9	2.2	3	3.6	4.3	4.5	4.8	5.6
3220	5620	9080	12900	23400	37100	53900	73600	100000	162000
4180	7300	11800	16700	30500	48200	70200	96000	130000	204000
4910	8506	13800	19600	35700	56600	82400	112000	154000	239000

Weight of per 1000 steel products(≈kg)

Length of Thread b

①,e_min=1.14s_min;
Combined gauging of socket dimensions and , see GB/T 70.5
②,80% of the values specified in GB/T 3098.1

Alternative history

GB /T 70.3 - 2000 GB /T 70.3 - 2008 GB /T 70.3 - 2023

Suppliers

Best price if from GlobalFastener.com.

Shanghai ATM Precision Fastening Technology Co., Ltd.

Xu Hai
+86-18621311857
+86-21-59766477

Materials: 301, 302, 303, 304, 304L, 316, 316L, 316Ti, 317L, 310S, 321, 347, 1.4529, 1.4539, 1.4462, 1.4547, 1.4980, 904L, 2205, 2507, 2520, S32750, S32760, 1Cr13, 1Cr17, 2Cr13, 3Cr13, 14Cr17Ni2, 410, 416, 420, 430, 431, 440, 630, 631, 17-4PH, MP35N, 600, 601, 625, 660, 718, 750, 800, 825, 925, 926, C22, C276, A286, GH2132, GH4033, GH4080, GH4169, GH4145, 9C18Mo, 4Cr10Si2Mo, 35CrMoA, 42CrMoA, 40CrNiMoA, 25Cr2Mo1VA, SCM435, SCM440, 4130, 4140, 4145, A36, A307, A320, A325, A490, A574, F1554; stainless steel, alloy steel, titanium alloys, nickel-based alloys, high-temperature alloys, corrosion-resistant alloys, nickel-cobalt alloys, special alloys, and other special materials per customer specifications. Grades: A1-50, A2-50, A2-70, A2-80, A3-70, A4-70, A4-80, A4-90, A4-100, A5-80, B8, B8M, B8C, B8T, B6, B7, B7M, B16, C1-50, C1-70, C1-110, C3-80, C3-120, C4-70, D2-80, D2-100, D4-80, D4-100, D6-80, D6-100, D8-80, D8-100, P1-90, P1-120, F51, F53, F55, F60, 10.9, 12.9, 14.9, 15.9, 16.9; Other grades available upon request. Specifications: M3–M120, 1/4"–4". No limitation on product diameter or length; custom non-standard parts can be manufactured upon request. Surface Treatments: passivation, black oxide, phosphating, electrophoretic coating, zinc plating, nickel plating, chrome plating, cadmium plating, gold plating, silver plating, tin plating, copper plating, zinc diffusion, marine zinc, aluminum diffusion, aluminum spraying, Dacromet, Geomet, Teflon coating, zinc-nickel alloy plating, nickel-cobalt alloy plating, hot-dip galvanizing, ceramic composite coatings, molybdenum disulfide coating, tungsten disulfide coating, nano-coatings, and other surface finishes per customer requirements.

Suzhou Yongchuang Fastener Factory

Mr. Tang
+86-15298892886
+86-512-66700967

Material: stainless steel, carbon steel; Nominal diameter: M1-M14; Nominal length: 5-400mm

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Similar Standards

1	[ISO] ISO 10642 - 1997	Hexagon Socket Countersunk Head Screws View Suppliers
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12	[ASME/ANSI] ASME/ANSI B 18.3.5M - 1993	Metric Hexagon Socket Countersunk Head Screws
13	[IFI] IFI 535 - 1982	Metric Socket Countersunk Head Cap Screws
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16	[ASME/ANSI] ASME/ANSI B 18.3.5M - 1986 (R2008)	Metric Hexagon Socket Countersunk Head Cap Screws (ASTM F835M / F879M / A1-70)
17	[BS] BS 2470 - 1973	Hexagon Socket Countersunk Head Screws - Unified Thread
18	[UNI] UNI 5933 - 1988	Hexagon Socket Countersunk Head Screws - ISO Metric Coarse Pitch Thread - Product Grade A
19	[JIS] JIS B 1194 - 2006	Hexagon Socket Countersunk Head Screws
20	[NF] NF E 25-146 - 2004	Hexagon Socket Countersunk Head Screws
21	[BS] BS 4168-8 - 1982	Metric Hexagon Socket Countersunk Head Screws
22	[CNS] CNS 4558 - 1981	Hexagon Socket Countersunk Head Screws
23	[IS] IS 6761 - 1994 (R2004)	Countersunk Head Screws with Hexagon Socket