ALUMINUM SLEEVE NUT 1.ISO,ANSI,JIS,DIN,BS& non-standard ... ,6.8,8.8,9.8.......... ALUMINUM SLEEVE NUT,ALUMINUM WELD NUT,NUT A good non-standard fastenerS manufacturer for your better ... manufacturer with more than 20 years experiences in screw,bolt,nut,washer,rivet, stud, pin,wrench and so on .2 ... socket is much deeper,it is convenient to tighten by screwdriver.3.As a credible manufacturer we are ,we can ...