Heavy-Duty HDG Square Washers for Slotted Channels and Timber Framing

HDG square plate washers comply with DIN436, featuring large flat bearing surface to bridge slotted solar strut holes and avoid timber crushing. Inner holes pre-enlarged for smooth HDG bolt penetration; edges tumbled to remove burrs without sharp zinc spikes. Thickness ranges 3–10mm, widely used for solar racks, timber frames and anchor bolt bases. Moisture-proof cartons & fumigation-free pallets for sea transport, custom rectangular/offset-hole washers available.