Drywall Screws Coarse Thread | 4.2/4.8mm Black Phosphate PH2 (65 – 150mm)

Drywall Screws – Coarse Thread | 4.2 / 4.8 mm Diameter | Black Phosphate | PH2 | 65–150 mm

Heavy-duty coarse-thread drywall screws engineered for high-strength fixing of thicker gypsum boards, plywood, OSB, and other heavy sheeting materials to timber framing. These longer screws are manufactured from hardened carbon steel with a black phosphate coating for superior corrosion resistance, reduced driving torque, and a clean professional finish.

Key Specifications

• Diameters: 4.2 mm (for 65–75 mm lengths) | 4.8 mm (for 100–150 mm lengths)
• Thread Type: Coarse (aggressive, deep threads for maximum pull-out strength in wood)
• Drive: Phillips #2 (PH2) – excellent torque transfer with minimal cam-out
• Head Style: Bugle head (countersunk) – flush seating with wide bearing surface to prevent paper tear
• Point: Sharp self-piercing point for fast start and easy penetration
• Lengths Available:
  4.2 mm × 65 mm | 75 mm
  4.8 mm × 100 mm | 125 mm | 150 mm
• Material: Hardened carbon steel
• Finish: Black phosphate (dry-film lubricant + corrosion protection)
• Standard: Meets or exceeds typical performance requirements for structural drywall and timber fastening

Features & Benefits

• Dual Diameter Range – 4.2 mm provides good reach with lower weight; 4.8 mm delivers higher shear and tensile strength for longer spans and heavier loads.
• Coarse Thread – Optimized for rapid installation and exceptional grip in softwood, hardwood, and engineered timber.
• Black Phosphate Coating – Enhances lubricity for smoother driving and offers reliable indoor corrosion protection.
• Bugle Head – Creates a strong, flush hold without damaging the drywall face.
• PH2 Recess – Deep, precise drive for high-speed installation with cordless impact drivers and screw guns.

Typical Applications

• Fixing thick drywall, fire-rated boards, soundproofing panels, and sheathing to timber studs
• Long-span ceiling installations and bulkhead construction
• Heavy timber-to-timber connections requiring high pull-out resistance
• Renovation, commercial fit-outs, and partition walls