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Cross recessed round head screws with collar

SJ 2830 - 1987

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原电子工业部SJ 2830 - 1987 SJ2830 2830SJ Cross recessed round head screws with collar
Screw Thread
d
M3 M4
P Pitch
a max
dc max
min
dk
k max
min
h max
min
Socket No.
M max
0.5 0.7
1 1.4
8 10
7.5 9.5
6.4 8.5
2.95 3.4
2.65 3.1
0.6 0.8
0.4 0.6
2 2
3.7 4