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Click Specification

(Non-preferred) dimensions in parentheses.

Unit:mm

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
Download CAD Model*

 *Models with different eras.

Calculate weight and price. Weight 1000 pcs : kg x $ per kg = $ 1000 pcs
Default density g/cm3
×

Choose materials based on density.(g/cm3)

  • Carbon Steel 7.85
  • Stainless Steel 8.1
  • Stainless Steel 7.95
  • Stainless Steel 7.7
  • Titanium Alloy 4.5
  • Aluminum Alloy 2.8
  • Copper 8.89


Select here or enter material density on the calculation page.
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 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,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

Alternative history

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

Suppliers

Best price if from GlobalFastener.com.
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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