Zinc plated DIN 7504K self-drilling hex head screw. Pack of 100. Supplied in a resealable bag. Specifications: Type: Hex Length: 50mm Quantity: 100 Size: 5.5 This Sealey self-drilling screw is designed for efficient drilling and fastening. It features a hex head for secure driving and a silver zinc-plated finish for corrosion resistance. The pack contains 100 screws, with each screw measuring 5.5mm in size and 50mm in length.