Grey Phosphated Drywall Screw – Fine & Coarse Thread Supplier

Grey phosphated drywall screws are designed for fastening gypsum board (drywall) to wood or metal studs. The phosphated coating improves corrosion resistance and reduces friction during installation.

Compared with standard screws, drywall screws feature deeper threads and a bugle head design, ensuring secure fastening without damaging the board surface.

They are commonly referred to as

• Phosphated drywall screws

• Gypsum board fixing screws

• Chipboard fasteners

• Bugle head self-tapping screws

• Black phosphate Parker screws

• Fine thread drywall screws for metal studs

• Coarse thread drywall screws for wood framing

Technical Specifications

Material: Carbon Steel C1022A

Diameter: 3.5mm / 3.9mm / 4.2mm / 4.8mm

Length: 13mm – 152mm

Head Type: Bugle Head

Drive: Phillips

Thread: Fine / Coarse

Surface: Grey Phosphate

Mechanical & Functional Properties

• Material: Carbon steel (C1022 or equivalent)

• Finish: Grey/black phosphating (anti-corrosion, paint adhesion)

• Drive: Phillips cross recess (PH2 / PH3 depending on diameter)

• Head: Bugle / countersunk – flush finish on drywall & wood

• Thread:

Fine thread (for metal stud framing)

Coarse thread (for wood & chipboard fastening)

• Hardness: Case hardened for penetration without pre-drilling

• Standards: Conforms to DIN 18182, ASTM C1002 for drywall screws

Applications

Drywall Installation

Fixing gypsum board to metal or wood studs

Partition walls and suspended ceilings

Interior Construction

Light steel keel systems

Ceiling frameworks

Renovation & Finishing

Wall repair and panel replacement

Acoustic and decorative board installation

Key Design Features

Bugle Head Design

The bugle head allows the screw to sit flush with the drywall surface without tearing the paper layer, improving finishing quality.

Phosphated Surface

Grey phosphating provides basic corrosion resistance and smoother driving performance, especially suitable for indoor applications.

Sharp Point / Drill Point

Sharp point → faster penetration into drywall and wood

Drill point → suitable for light metal profiles

Fine Thread vs Coarse Thread (Selection Guide)

Fine thread screws are commonly used for metal framing, while coarse thread screws perform better in wood structures

Why Grey Phosphated Drywall Screws Are Preferred

Better corrosion resistance than plain screws

Smooth driving reduces installation effort

Strong holding power in drywall and studs

Cost-effective solution for large construction projects

Why Choose Our Drywall Screws

Full size range for different drywall systems

Stable hardness and drilling performance

Consistent thread quality for secure fastening

OEM packaging and private label support

Fast response for bulk orders and export shipments

FAQ

Q1: What Is The Difference Between Black And Grey Phosphate Drywall Screws?
Both provide corrosion resistance, while grey phosphate offers smoother driving performance.

Q2: Can Drywall Screws Be Used For Wood?
Yes, coarse thread drywall screws are suitable for wood studs.

Q3: Are Drywall Screws Suitable For Metal?
Yes, fine thread drywall screws are designed for metal studs.

Q4: Do Drywall Screws Need Pre-Drilling?
No, most drywall screws are self-tapping and can be installed directly.

Get A Quote

Send us your required size, thread type, and quantity.
We will provide quotation and technical support within 12 hours

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