DIN7504-N pan head self drilling screw C1022 steel hardened Size 6, 7, 8, 9, 10, 12, ... Hex flange head or hex washer head4. Optional aluminium/steel washer, EPDM washer5. DIN7504-K or -N head ... Counter sunk head or round head9 .Other Material: C1022 steel, stainless steel SS41010. Surface Treatment: ZP or YZP, BZP, ... 4#10x1#10x1-1/2#10x2Immediately shipment! hardened steel pan head self drilling screw