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(Non-preferred) dimensions in parentheses.

Hexagon Socket Countersunk Head Screws

GB /T 70.3 - 2000

Display drawing:

国标GB /T70.3 - 2000 GB70.3 70.3GB Hexagon Socket Countersunk Head Screws

 *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
M3 M4 M5 M6 M8 M10 M12 (M14) M16 M20
P Pitch
b Ref.
dk Theoretical max
Actual min
ds max
min
e min
k max
s Nominal Size
max 12.9
Other
min
t min
Minimum tensile load(N) 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,emin=1.14smin;
Combined gauging of socket dimensions and , see GB/T 70.5
②,80% of the values specified in GB/T 3098.1

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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