Spring washer reinforced version 4 mbo 28 Stainless steel
for bolts and shafts without groove
3 reviews since 24.10.2026
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1 The specifications regarding trigger forces apply only to steel versions, not to spring washers made of stainless steel, and are based on our own tests using a bright steel shaft made from materials 1.1151 or 1.0715, each in tolerance class h11.
We recommend customer-side tests, as roughness or work hardening of the steel shaft, among other factors, can lead to different values.
We recommend customer-side tests, as roughness or work hardening of the steel shaft, among other factors, can lead to different values.
Order no.
10 28 1040 0115/000
SKU
0109030
Identifier
Spring washer reinforced version
Size
4 mbo 28
Material group
Stainless steel
Surface
bright
d1
4
d
3,57-3,8
D ±0,3
11,5
H ±0,2
1,27
s
0,4
Trigger force approx. N¹
-
U min.
3
Number of slots
5
Material
Stainless steel