This standard BS EN 3637:2023 Aerospace series. Nut, self-locking, bi-hexagonal (double reduced), in heat resisting nickel base alloy. NI-P101HT (Waspaloy), silver plated, Classification: 1 210 MPa/730 °C is classified in these ICS categories:
49.030.30 Nuts
This document specifies the dimensions of self-locking, silver-coated bi-hexagonal nuts with MJ-thread in heat resisting nickel base alloy NI-P101HT for aerospace applications. Maximum test temperature of the material 730 °C.