... -M20(#6-3/4”)Custom made products are also welcomed. Flange nuts Materials1.Stainless Steel: SS201, SS303, SS304, SS316, SS410, ... ,C1022,C1035K,C10458.Alloy steel: SCM435,10B21Flange nuts Surface treatment Plain, Black Oxide,nickel plated, Chromated, passivated, zinc plating, phosphated, ... report can be provided as per your need. Hexagon flange nuts MOQ 10000pcs FOBSHENZHEN PRICE 0.010-0.0150USD/PCSB ...