Uxcell M2 X 4Mm 3.2Mm Od Brass Threaded Insert Embedment Knurled Thumb Nut 1000PCS
A brass knurled nut, or thumb nut, is a nut with a knurled outside surface, rather than hex.This facilitates tightening by hand.These nuts are used in finished materials such as light fixtures, antique and motorcycles etc.