... 1/4... 2)carbon steel, stainless steel,aluminium 3)ROHS Compliant; TS-16949(including ISO 9001 round ... M3 to M12, inch 5/32, 3/16, 1/4,5/16, 3/8Surface tratement: Yellow/white/black zinc ... , plaing, with flat head 2) High crimping force 3) Screw length can be varied 4) Just-in-time manufacturing ... M3 to M12; inch 5/32, 3/16, 1/4,5/16, 3/8MaterialCarbon steel, stainless steel and aluminiumHeadFlat ...