12-11×25-50 Z/Y T17 Hex Head Screw

Product Overview
This product is a T17 cutting‑point hexagon flange self‑tapping screw, made of carbon steel, quenched and hardened, then finished with colored zinc passivation. The integrated hexagon flange head, combined with the T17 wood‑cutting point featuring chip‑clearing grooves, is specifically designed for composite fastening of color‑coated steel sheets to timber. It offers a balanced combination of installation efficiency, fastening strength, and corrosion resistance, making it a cost‑effective general‑purpose fastener for construction and woodworking.

Product Applications
Roofing projects: fixing color‑coated steel tiles and polycarbonate sheets to wooden purlins, and for factory shed roof construction;
Timber structure projects: splicing and assembling of wooden houses, preservative‑treated wood boardwalks, fences, pavilions, and timber frames;
Decoration and finishing: installation of ceiling furring strips, plywood substrates, and metal edging for doors and windows;
Outdoor structures: garden trellises and wooden decks in general environments; for coastal high‑salt‑spray areas, stainless steel versions are recommended.