6,3 mm x 22 mm HEFTER TEK SCHRAUBEN DACHDECKERSCHRAUBEN FIX WELLBLECH BEFESTIGUNG
Tek screw adapter size: 8mm (5/16”). Screw length from under head: 22mm. Zinc plated. No 1 hardened carbon steel self drilling reduced point. Bonded neoprene washer to provide watertight seal.