DIN 7504 hex self tapping screw with EPDM washer 1) Standard: ... K) 2) Length:13mm ~ 240m DIN 7504 hex self drilling tapping screw with EPDM washer 1) Standard: EN ... drill ,SDS #5 point, cut thread ,Sandwich Panel Self Drilling Screw, C-1022 Steel, Case Hardened, Double Thread ... ,Bulk Packing . We mainly manufactures various series of self drilling and tapping screws with monthly production 1000 ton. ...