Metal Construction Light Section Screws - Hex - Self-Drilling - Bi-Metal - Exterior - Silver Organic The flat underside of the

The flat underside of the screws head allows it to clamp the materials together firmly

Metal washer with rubber (EPDM)

When the wings hit the metal they will break off to permit the thread to self-tap into the metal

Countersunk head with ribs under head for improved countersinking

A specialised fastener designed to securely fix and clamp floorboards to joists

Metal Construction Light Section Screws - Hex - Self-Drilling - Bi-Metal - Exterior - Silver Organic The flat underside of theHex head self drilling screws, for joining roofing sheets to light section steel (Max. 5. 0mm) without the need to pre drill a hole.