Description: Size: M2.9~M6.3 / #4~#14 / 1/4,5/16 Length: 9.5~300mm / 3/8~12" Material: Carbon Steel / Stainless Steel Drilling Point Type: #2/#3/#4/#5 / S point / Reduced point Attachment: W/WO EPDM Bonding Washer Surface Treatment : Zinc plated, Yellow Zinc plated, Black zinc, Zinc Nickel, Mechnical Galvanized, Ruspert, Slat Spray Test according to customer requirement. Standard: DIN, IFI, JIS, according to customer's drawing Package: Bulk packing, Box packing, Bag packing, Blister Product Usage: Apply to metal plate, galvanized steel plate, metal curtain wall, metal light compartment, aluminumdoor and window, indoor and outdoor decoration. General anglesteel, channel steel, iron plate, PC Board and other metal material combininginstallation EPDM bonding washer characteristic : It can able to bear high temperature, ozone and environment. It has strong material can elongate and match object when drills with screw. Preventing rain or water into drill hole, so that it's a reliable prevented water gasket. EPDM Color: Black and Grey Metal Bonding Flat material: Hot Dip Galvanized, Aluminum, and Stainless steel