TIMCO Self-Drilling Light Section A2 Stainless Steel Bi-Metal Screws with EPDM Washer - 5.5 x 100
Hex head self-drilling screws, for joining roofing sheets to light section steel (Max. 5.0mm) without the need to pre-drill a hole. Hex Screw W16 SDRILL No3 BIMET
Hardened carbon steel drill tip fused on to an A2-304 Austenitic Stainless Steel body