Product Description Size : M2.9~M6.3 / #4~#14 / 1/4,5/16 Length : 9.5~300mm / 3/8~12″ Material : Stainless Steel Drilling Point Type : #2/#3/#4/#5, S point, Reduced point Attachment : W/WO EPDM 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 Flange characteristic: Big flange washer in hex head self drilling screw has notch can attach with EPDM washer, and it can prevent water and rain into the object to casue corrosion when flange washer screw drills EPDM bonding washer’s function is the same with EPDM washer, the flange washer instead of metal bonding flat can match in company with screw to drill into object. EPDM Color : Grey Wide washer is different from hex washer head but similar with Hex Flange Head Self Drilling Screw. It has flange and undercut under the head, once it used on the roofing, EPDM normally will fix together to avoid environment influence. Hex Flange Head Self Drilling Screw is able to manufacture double thread (upper coarse thread, down fine thread) by customer requirement. F.A.Q Who are we? We are based in Shandong, China, start from 2014,sell to North America(20.00%),South America(20.00%),Eastern Asia(20.00%),Western Europe(20.00%),South Asia(20.00%). There are total about 5-10 people in our office. How can we guarantee quality? Always a pre-production sample before mass production; Always final Inspection before shipment. What can you buy from us? Fasteners,guide,bearing. What services can we provide?Accepted Delivery Terms: FOB,CFR,CIF； Accepted Payment Currency:USD,EUR,JPY; Accepted Payment Type: T/T; Language Spoken:English,Chinese