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Click Specification

Unit:mm

The Parts and Units of Jigs and Fixtures-hexagon Head Holddown Screw

GB /T 2161 - 1991

Display drawing:

国标GB /T2161 - 1991 GB2161 2161GB The Parts and Units of Jigs and Fixtures-hexagon Head Holddown Screw
Screw Thread
d
M8 M10 M12 M16 M20 M24 M30 M36
dk ≈
D1 ≈
k
s max
min
d1
d3
z
L1
L2
L3
L4
L5
SR1
SR
12.7 14.2 17.59 23.35 31.2 37.29 47.3 57.7
11.5 13.5 16.5 21 26 31 39 47.5
10 12 16 18 24 30 36 40
11 13 16 21 27 34 41 50
10.76 12.76 15.76 20.72 26.72 33.66 40.66 49.66
6 7 9 12 16 18 18 18
M8 M10 M12 M16 M20 M24 M24 M24
5 6 7 8 10 12 12 12
8.5 10 13 15 18 20 20 20
2.5 2.5 2.5 3.4 5 5 5 5
2.6 3.2 4.8 6.3 7.5 8.5 8.5 8.5
9 11 13.5 15 17 20 20 20
4 5 6.5 8 9 11 11 11
8 10 12 16 20 25 25 25
6 7 9 12 16 18 18 18

Alternative history

GB /T 2161 - 1991 JB /T 8006.2 - 1999
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