Rivet Nut specification:M3 ,M4 ,M5, M6, M8 ,M10 ,M12, inch: 1/ ... ,5/32 3/16,5/16. material: steel, stainless steel, Rivet nutwe use cold forged technique, not only save materials,good ... : steel, stainless steel, brass,aluminium. M4-M10 flat head hex Rivet nut