This line of ESNA aerospace locknuts with nonmetallic inserts is manufactured in a range of configurations. A red nylon is used as the locknut insert for applications up to 250F. DuPont's Vespel ...

This pattern is used to 3D print locknuts and keys as one piece using acid and corrosion-resistant stainless steel. Ford says they have also included measures to prevent cloning.

Red nylon is used for locknut inserts for applications up to 250F. For temperatures to 500F there are Vespel inserts. The wrenchable nuts are available as hex and double-hex styles in sizes from ...

Prevailing-torque locknuts can also be used as spacer or stop nuts where components must be free to rotate without end play.