Nut: Steel, blackened finish, tensile strength 500 N/mm2
Unhardened type: Not hardened or ground
Hardened type: Hardened HRC 60 +/- 2, thread not hardened,
mating surface ground, fine turned
On slotted spanner nuts DIN 1804,
the ground surface d3 protrudes slightly and should be used
as a mating surface.
Additional sizes up to M 200 x 3 available upon request.
For our selection of hook spanner wrenches for use with these
components, see Section
16 - Tools, particularly
hook spanner wrenches with nose end.