NIRO Hexagon lock nut DIN 439
nominal size
d
e
s
k
stock no.
mm
mm
mm
right hand thread
left hand thread
M4
M4
7,7
7
2,1
303512004
303513004
M5
M5
8,8
8
2,7
303512005
303513005
M6
M6
11,1
10
3,2
303512006
303513006
M8
M8
14,4
13
4,0
303512008
303513008
M10
M10
18,9
17
5,0
303512010
303513010
M12
M12
21,1
19
6,0
303512012
303513012
M16
M16
26,8
24
8,0
303512016
303513016
All lock nuts are delivered with
right hand thread
unless specified otherwise.