... K, DIN7504-N Hardened steel hex washer head self drilling screwZP, YZP, BZP, or SS410 stainless steelHead Type: ... /steel washer, EPDM washerDIN7504-K or -N head regular supply 3.5x15,19,25, 30 4.2x19,25 ... or YZP, BZP, brass, bronze coated optionsFull threaded drilling, double threadedRegular supply in stock goods!CS ZP, YZP ... and SS410 plain drilling screws#3.5, #4.2, #4.819mm to ...