This knurled nut is a non-through female type nut in black nylon. This is the BPF 90 model. Composed of a brass insert, it allows tightening and protection of the screw.
This part allows tightening and protection of the screw thanks to its non-opening part.
The stainless steel insert allows the insertion of a stainless steel screw.
This nut is used in industry, maintenance and furniture.