Coarse Thread Drywall Screws – Carbon Steel – Indoor Use

Product Overview

Explore our 100mm coarse thread drywall screws, designed for heavy-duty applications that require exceptional penetration through multiple board layers. Each screw is made from hardened carbon steel with a black phosphate coating, providing light corrosion resistance and a clean, low-glare finish.

The bugle head ensures smooth, flush seating without tearing the board’s paper surface, achieving a professional, ready-to-fill finish. The sharp W-type gimlet point allows easy penetration and rapid engagement into timber, reducing driving effort. The coarse thread is optimized for wood substrates, delivering strong bite and resistance to pull-out in natural grain.

These 100mm heavy-duty long fixings are ideal for deep board assemblies and heavy timber frameworks.

Features & Benefits

• Material: Hardened carbon steel ensures strength and consistent driving torque.
• Corrosion Resistance: Black phosphate coating resists rust and oxidation under dry interior conditions.
• Head Design: Bugle head compresses gypsum and paper for a flush surface finish.
• Thread Type: Coarse W-type thread offers fast drive and secure grip in timber.
• Point Type: Sharp gimlet point ensures quick starting and reduced splitting.
• Nominal Size: 100mm length.
• Box Quantity: Supplied in a box of 500 for efficient coverage of high-volume projects.

Applications

• Multi-layer Drywall Assemblies: Ideal for extra-deep wall systems.
• Timber Framing and Joists: Provides strong hold for reinforced wall and ceiling structures.
• Heavy Partition Walls: Reliable fixing through deep substrate layers.

Installation Guidance

• Drive Type: Use a Phillips No.2 bit for controlled installation.
• Speed Setting: Drive at medium speed to avoid over-countersinking.
• Depth Control: Seat screw head just below the paper surface without rupturing.
• Spacing: Maintain 250mm centers on walls and 150mm on ceilings.

Compliance & Performance

• Manufacturing Reference: Produced in accordance with EN 14566 for drywall screws.
• Finish: Black phosphate coating provides corrosion protection for interior use.
• Safety: Always wear eye protection and ensure stable support when driving.
• Important Note: Not suitable for exterior or high-moisture environments.

FAQ

• Can these screws be used outdoors? No, they are not suitable for exterior or high-moisture environments.
• What bit should be used? Use a Phillips No.2 bit for best results.
• Are these screws suitable for metal studs? They are optimized for wood substrates and may not perform as well with metal.