8×11/2 Metal Tapping Screws

Used for stitching metal or attaching to metal. A pre-drilled hole is required. Countersunk head gives a discreet finish into pre-countersunk holes. Plated in Trivalent Chromium (Cr3) Zinc. 60 self-tapping thread for ease of insertion. Manufactured to BS 4174:1972

4.2x38mm