Product Overview
This product is a dedicated countersunk ribbed self‑tapping screw for light‑gauge steel framing projects, commonly known in the industry as a "light‑gauge drywall screw". The thread specification is ST3.5, with a head diameter of 7 mm, and standard lengths covering a range from 22 mm to 51 mm in multiple options. The substrate is made of Cr6 high‑carbon steel, carburized and quench‑hardened, with an electroplated zinc and hexavalent chromium blue‑white passivation finish, presenting a uniform bright blue‑white metallic appearance. The screw is specifically developed for fixing paper‑faced gypsum boards to light‑gauge steel framing. The integrated countersunk ribbed head structure, combined with coarse self‑tapping thread, eliminates the need for pre‑drilling and is compatible with high‑speed power drivers, making it a mainstream standard fastening accessory for residential and commercial ceiling and partition projects.
Product Applications
Suitable Projects: Fixing paper‑faced gypsum boards in residential and commercial light‑gauge steel ceiling, partition, and decorative feature wall installations.
Compatible Substrates: 9.5/12/15 mm gypsum boards with thin‑wall light‑gauge steel framing, supporting single‑ or double‑layer panel installation.
Length Selection: 22 mm for single thin layers; 30–38 mm for standard 12 mm gypsum boards; 45–51 mm for double‑layer boards and thickened partition reinforcement.
Usage Environment: Dry indoor areas such as residences, shopping malls, and offices. Not suitable for kitchens, bathrooms, outdoor areas, or other high‑humidity corrosive environments.
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