4.2x13mm galvanized self-drilling washer screw 100 pieces WSPC-42013

Product description

Wood-steel self-drilling screw. A self-drilling screw designed for mounting wooden elements to steel substrates. The conical head allows the screw to be flush with the plane, the projections ream the fastened material preventing damage when drilling the screw through the steel substrate. After passing through the wooden element, the tabs break at the contact with the metal.