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(Non-preferred) dimensions in parentheses.

Unit:mm

Knurled Thumb Screws With Waisted Shank

GB 839 - 1988

Display drawing:

国标GB 839 - 1988 GB839 839GB Knurled Thumb Screws With Waisted Shank
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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 .
Screw Thread
d
M3 M4 M5 M6 M8 M10
P pitch
ds max
min
dk before knurled max
min
k max
min
n Nominal Size
max
min
t min
b thread length
r min
h
B ≈
R ≈
c
c1
0.5 0.7 0.8 1 1.25 1.5
2 2.8 3.5 4.5 5.5 7
1.86 2.66 3.32 4.32 5.32 6.78
5 8 9 11 14 17
4.82 7.78 8.78 10.73 13.73 16.73
4.5 6.5 7 10 12 13.5
4.32 6.32 6.78 9.64 11.57 13.07
0.8 1.2 1.2 1.6 2 2.5
1 1.51 1.51 1.91 2.31 2.81
0.86 1.26 1.28 1.66 2.06 2.56
0.7 1.0 1.2 1.4 1.9 2.4
4 6 8 10 12 15
0.1 0.2 0.2 0.25 0.4 0.4
1 1.5 1.5 2 2.5 2.5
1 1.5 1.5 2 2.5 3
0.5 0.75 0.75 1 1.25 1.5
1 1.2 1.6 2 2.5 3
0.3 0.3 0.5 0.5 0.8 0.8
Weight of per 1000 steel products(≈kg)
- - - - - -

Alternative history

GB /T 839 - 1988
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14 Rotary Handle Screws - T Type [CNS]
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