AIA NASM85353:2023

The preload locking fastener is intended for use as a locking device for both permanent reusable installations on such applications as rod and bearings, compressor wheel hold down nuts, preload locking clamp nuts, hydraulic actuator lock nuts, stud lock nuts and as a secondary locking device where dual locking is required. Fasteners are subjected to the design and usage limitations of MS14194.

This specification covers the requirements for preload locking nuts (hereinafter referred to as internally threaded fasteners) to be used in applications where temperatures will not exceed 450 °F, 800 °F and 1,200 °F.