Black Square Clip - Hidden Fastener for Deck Boards

This black square clip is a hidden fastener for joining WPC deck boards. Its square body holds the board gap even and locks each board to the joist, keeping the deck surface clean with no visible screws. It is part of the HS decking accessory range.

Key Specifications

Why Choose This Fastener

• Square body holds a consistent board gap for drainage and expansion
• Locks boards to the joist for a firm, quiet deck surface
• Hidden fixing keeps the surface clean, with no visible screws
• Corrosion-resistant and UV stable for long outdoor life

Performance Highlights

• Corrosion-resistant for long outdoor service life
• Weather and UV stable, so parts keep their fit and finish
• Consistent dimensions for reliable, repeatable installation
• Compatible with standard WPC decking profiles

Material & Durability

Engineering-grade plastic / nylon. Parts are produced for outdoor decking use, where damp ground, rain and sun are the norm, so they are specified to resist corrosion, brittleness and loss of holding power over time.

Installation

Placed between two boards over a joist and fastened with a stainless-steel screw; the square body sets the board gap.

Quality Assurance & Testing

Each production batch is checked for dimensional tolerance, strength and finish before shipment. Parts are produced to CE and RoHS requirements, and third-party inspection is welcome before shipment.

Manufacturing & Export Experience

Supplied by HS, a WPC decking and accessory producer based in Chengdu, Sichuan, China, with more than 18 years of composite decking experience. Our export team supports OEM/ODM branding, project take-offs and combined container loading for overseas buyers.

Applications

Joining and spacing composite deck boards on patios, terraces, balconies and boardwalks.

Customization & Ordering

• OEM/ODM packaging and custom branding available for volume orders
• Complete accessory list and installation guidance provided with each order
• Project quantities and combined container loading supported

Contact our export team for a quotation, free samples or a technical data sheet for your project.