Metric nuts, 316 (A-4)

Nuts have internal machine threads, for use with machine thread bolts and screws.

Metric nuts, 316 (A-4)
Flange nuts serrated A nut with a built in washer which is serrated to resist loosening. Stainless steel 316 (A-4) Also known as A-4 stainless, 316 is a highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments. Show Details Hide Details

A nut with a built in washer which is serrated to resist loosening.