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.

A line of ESNA aerospace locknuts with nonmetallic inserts come in a wide range of configurations. Staff. Red nylon is used for locknut inserts for applications up to 250F.

Prevailing-Torque Locknuts. Nov. 15, 2002. A built-in locking feature develops full locking action as soon as these nuts are engaged with the bolt threads.