200-907 Nut 5/16-18 Nyloc
5/16 x 18 SAE Nyloc Zinc Plated Nut, Price idividually.
The 200-907 Nut 5/16-18 Nyloc is a torque prevailing nut which uses a plastic/nylon insert located towards the top of the nut,
reducing its inner diameter, which then deforms over the mating thread.
This captures the bolt or screw, providing a locking feature causing resistance or prevailing torque.
This Keeps the nut locked in position and resistant to vibration.