1.This is the alumina ceramic nut parts, it is soild screw bar, the screw size is M2. We also accept the custom size and shape about this parts. 2.Compared with common metal parts, alumina ceramic nut parts have higher hardness and strength, better wear resistance, better stability, excellent biocompatibility, etc. 3.Alumina ceramic nut parts have the characteristics of high temperature resistance, corrosion resistance, rapid cooling and rapid heat, high mechanical strength and superior electrical performance. 4.Alumina ceramic nut parts are widely used in industrial equipment manufacturing and other fields.