The RS Pro Hexagon lock nuts are applied to corresponding male threads like bolts, setscrews, machine screws, and threaded rods. With a low profile, typically half the height of a full nut, they serve as a type of lock nut, effectively locking in place when tightened against either a full or lock nut. This design is intended to connect two or more objects and can be used in situations where a standard full nut might not fit. Commonly used in automotive, machinery, engines, manufacturing, industrial equipment, and white goods, these nuts have a hexagonal shape compatible with standard sockets and spanners, allowing for easy tightening and loosening. Reusable and suitable for maintenance and repair projects, they are also known as jam and half nuts.

Can be tightened and loosened endless times
Ideal for maintenance and repair projects
The plain (self color) finish is intended for internal use only
Conforms to DIN 439B or 936 specifications