... 8.8 2.finishing:zinc 3.material:alloy steel Non-standard perforation no thread screw((Including machining) 1.Standards:DIN ,ANSI/ASME,BS ... ,GB,JIS,Non-standard2.Metail:Carbon steel,stainless steel,alloy ... United States, Saudi Arabia, Europe,South Korea,Southeast Asia ,etc. Non-standard perforation no thread screw((Including machining))