11x TIMCO Nylon Nuts Type P Zinc 16NPP Pack of 2

ManoMano

General description Type P hexagonal nylon insert nut with a metric thread. Also known as locking nuts, these are designed to prevent loosening. Suitable for all bolting and fastening applications.

Amazon

Conforms with DIN985 Zinc plated and passivated (3-5 microns) Nylon insert Type T (Thin)