GB /T 70.3 - 2008 Hexagon Socket Countersunk Head Screws


Unit: mm
Nominal Length L Tips:seclect Nominal Length L and get Weight .
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
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 11.20 13.44 17.92 22.40 26.88 30.8 33.60 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
2.303 2.873 3.443 4.583 5.723 6.863 9.149 11.429 11.429 13.716
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
2.080 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)
- - - - - - - - - -
①,emin=1.14smin;
Combined gauging of socket dimensions and , see GB/T 70.5
②,80% of the values specified in ISO 898-1.
Alternative history
Suppliers
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1
China Mainland Suzhou Yongchuang Fastener Factory
Mr. Tang
Mobile Phone: +86-15298892886 Telephone: +86-512-66700967
Material: stainless steel, carbon steel; Nominal diameter: M1-M14; Nominal length: 5-400mm
Contact us via Email
2
China Mainland Dongtai Huawei Standard Component Co., Ltd.
Frank Qiu
Telephone: +86-515-85521918/85525868/85528009/85922919/85923919
Material: stainless steel 304, 316; Nominal diameter: M2-M20; Nominal length: according to customer requirement
Contact us via Email
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