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DIN Fasteners
DIN 557 Square Nuts
DIN 557 Square Nuts
Equivalent Standards
CSN 21624
PN 82151
UNI 5597
DIN 557 Square Nut Dimensions
d
m
mw
s
e max
dw min.
¬
M5
4.0
2.5
8
11.3
6.7
8
M6
5.0
3.2
10
14.1
8.7
10
M8
6.5
4.1
13
18.4
11.5
13
M10
8.0
5.2
17
22.6
14.5
17
M12
10.0
6.6
19
25.4
16.5
19
M16
13.0
8.6
24
33.9
22.0
24