Al Metal Special Metal Parts

Mechanical properties of steel nuts (coarse thread) according to ISO 898/2-1980(E)

This table contains information on the mechanical properties of steel (coarse threaded) nuts.

¹⁾Nuts style 1 (ISO 4032).
²⁾Nuts style 2 (ISO 4033).

NOTE Minimum hardness is mandatory only when nuts cannot be proof load tested, or of heat treated nuts. For all other nuts minimum hardness is provided for guidance only.
Hardness values for nominal sizes (thread diameters) over 39 up to and including 100 mm are to be used for information and guidance only.

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