Rivet Nut Size:M3-M12 Material:carbon steel,stainless steel,copper Can ... knurl Surface treatment:Plain, Black, ZP ( white, bluish, Yellow), HDG Blind Rivet nuts provide strong threads in panels too thin to ... , corrosion resistant Stainless steel -----resistant to corrosion and temperature, Rivet nut head style----flat head, countersunk head, reduced head Flat Head ...