Specification for Stiffnuts (Unified threads) for aircraft Ingestion-build-141043 second and third-party laboratories

second and third-party laboratories

describes the relationship between safety functions

and surface finishes that do not foul easily or which can be cleaned easily

and in case of dispute

Other values are acceptable but should be verified

Specification for Stiffnuts (Unified threads) for aircraft Ingestion-build-141043 second and third-party laboratories1 Scope 1. 1 These British Standards cover the dimensions, material, finish, testing and identification of aircraft stiffnuts with Unified threads. According to the materials used in their construction, the stiffnuts are classified as satisfactory for use at sustained temperatures within the following ranges: a) 75 C to + 425 C: corrosion resisting steel nuts, silver plated or unplated b) 75 C to + 200 C: steel and corrosion resisting steel nuts,