| Item | Details |
|---|---|
| Product Name | Coarse Thread Drywall Screw |
| Raw Material | Grade 4.8 carbon steel |
| Surface Treatment | Black phosphate coated |
| Available Sizes | 3.5mm, 3.9mm, 4.2mm, custom long lengths available |
| Structure | Countersunk Phillips head, full coarse wood thread, sharp self-piercing tip |
| Fit For | Gypsum drywall, soft wood studs, plywood joists, indoor wall & ceiling decoration |
| Advantages | Deep coarse thread interlocks tightly with wood fiber for strong pull-out resistance; countersunk head fully sinks into drywall to form flat seamless wall surface; matte black phosphate coating does not interfere with wall putty and paint finishing; sharp piercing tip drives into timber without pre-drilling holes; uniform thread structure effectively prevents drywall sagging after long-term use |
| Application Range | Indoor drywall partition installation, wooden frame ceiling fixing, home interior renovation, wooden stud wall cladding |
| Custom Service | Custom total length, zinc plated coating alternative, fine thread self-drilling style optional, special tip customization |
This coarse thread drywall screw is a dedicated fastener for fixing gypsum boards onto wooden framing materials.It is cold forged from Grade 4.8 carbon steel with black phosphate anti-rust coating, suitable for all indoor decoration construction environments. The matte black surface avoids color bleed when covered by wall filler and paint, simplifying subsequent wall finishing work.
Compared with fine thread drywall screws for metal keels, its thick and deep coarse thread bites firmly into softwood and plywood, resisting loosening caused by seasonal wood shrinkage. The Phillips cross recess matches standard screwdriver bits, supporting efficient mass installation. The countersunk design completely hides the screw head under drywall to maintain smooth wall appearance.
All finished screws pass pull-out load and surface corrosion resistance tests before shipment, complying with interior decoration hardware standards. Customers can customize screw length and surface treatment according to actual renovation engineering requirements.
