Product Overview
M4.5 x 40 Green Decking Screws for reliable board-to-joist fixing in hardwood, softwood, and treated timbers.
Each screw is manufactured from Ruspert-coated steel, featuring a durable three-layer metallic coating of zinc, film, and ceramic.
This advanced finish offers excellent corrosion resistance and a subtle, low-visibility appearance that complements the colour of treated softwood decking and garden structures.
The countersunk head draws boards tight for a flush, professional finish with reduced movement and creak.
A sharp, coarse thread provides fast bite, controlled driving, and dependable pull-down across typical decking substrates.
Suitable for fixing thin boards, edging, and narrow components into joists.
Features & Benefits
- Exterior durability: Hardened carbon steel with corrosion-resistant coated finish for outdoor decking conditions.
- Flush finish: Countersunk head clamps boards to joists for a smooth walking surface.
- Fast bite: Coarse single thread and sharp point promote rapid insertion and strong pull-out resistance.
- Timber compatibility: Suitable for softwood, many hardwoods, and pressure-treated joists; pilot drilling recommended for dense boards and near edges.
- Low-visibility head: Green finish blends with treated softwood decking and garden structures.
- Nominal size: M4.5 x 40mm.
- Tub quantity: Supplied in a box of 200 for efficient deck coverage and fewer on-site restocks.
Applications
- Thin decking boards: Reliable fixing of narrow or low-profile boards to timber joists without risk of breakthrough.
- Edging and fascia trims: Provides neat, flush fixing for perimeter boards, fascias, and step nosings.
- Deck borders and skirting: Secure attachment of finishing components for a consistent edge detail.
- Light outdoor joinery: Suitable for battens, small rails, and decorative timber features.
- General exterior carpentry: Versatile screw for light-duty timber assemblies and maintenance work.
Installation Guidance
- Pilot & clearance: Pilot dense hardwoods and pre-drill near board ends to limit splitting.
- Driving technique: Drive at moderate speed with steady pressure; avoid over-torque that can strip fibres.
- Head seating: Countersink until flush; do not bury the head below the board surface.
- Good practice: Maintain consistent board gaps and fix each board with two screws per joist line.
Compliance & Performance
- Manufacturing reference: Produced to relevant timber fastener requirements (EN 14592 reference for mechanical fasteners).
- Corrosion protection: Exterior coated finish suitable for typical residential exposure; check local exposure class.
- Substrate suitability: Use with timber and most composite-over-timber installs; verify composite manufacturer guidance.
- Safety: Wear eye protection; support boards during fixing.
- Important note: For aggressive/coastal environments or permanent wet areas, specify stainless steel grade fasteners.