Black Drywall Screws Bulge Head Coarse Thread Drywall Screw for Wood

Description

What Are Drywall Screws?

Drywall screws are specialized fasteners designed for securing drywall (gypsum board) to wood or metal studs. They feature a sharp point for easy penetration, fine threads for strong grip, and a bugle head that sits flush with the drywall surface without tearing the paper. These screws are essential in construction for creating smooth, stable walls and ceilings.

Specifications of Drywall Screws

1. Materials

• Carbon Steel (Black Phosphate Coated) – Most common, cost-effective, and rust-resistant for indoor use.

• Stainless Steel (304 or 316) – Used in humid or corrosive environments (e.g., bathrooms, marine applications).

• Galvanized Steel (Zinc-Coated) – Provides extra rust resistance for exterior or high-moisture areas.

2. Surface Treatments

• Black Phosphate Coating – Prevents corrosion and improves adhesion for joint compound.

• Zinc Plating (Galvanized) – Enhances rust resistance for outdoor or wet conditions.

• Ceramic Coating (for fire-resistant drywall) – Used in high-temperature applications.

3. Common Sizes & Types

• Length: 1″ to 3″ (25mm to 75mm).

• Diameter: #6 (most common), #8 (for heavier drywall or metal studs).

• Thread Types:

  • Fine Thread (for metal studs) – Prevents stripping in thin metal.

  • Coarse Thread (for wood studs) – Provides better grip in wood.

• Head Types:

  • Bugle Head – Countersinks smoothly into drywall.

  • Wafer Head – Used with washers for additional holding power.

Applications of Drywall Screws

• Drywall Installation – Attaching gypsum boards to wood/metal framing.

• Ceiling Panels – Securing drywall to ceiling joists.

• Soundproofing & Fireproofing Walls – Used in multi-layer drywall systems.

• Plasterboard Fixing – Alternative to nails for better holding strength.

• Insulation Board Attachment – Mounting foam or fiberglass panels.

Excellent Case: Drywall Screws in High-Rise Construction

Challenge:

A high-rise residential project required fastening drywall to metal studs in a humid coastal environment, where standard screws risked rusting and failing over time.

Solution:

The construction team used stainless steel (316-grade) drywall screws with fine threads for metal studs. The corrosion-resistant material ensured longevity, while the sharp point and self-tapping design sped up installation.

Result:

• 50% faster installation compared to traditional screws due to easy penetration.

• Zero rust issues even in high-humidity conditions, ensuring long-term durability.

• Smooth, crack-free walls due to proper countersinking of bugle heads.