Square Washer

The Zinc Plated Square Taper Washer is a durable and reliable inclined surface fastening accessory designed to compensate for the inclined contact surface of channel steel, I-beam and other profiled steel in steel structure connection, machinery assembly and construction engineering applications. Featuring a square washer body with precision machined tapered inclined surface and standard inner hole, this washer achieves perfect fit between the fastener and the inclined contact surface, effectively preventing bolt bending, connection loosening and surface damage, while maintaining stable and uniform clamping force for long-term secure structural connection.

Manufactured from high-quality grade 4.8 or 8.8 carbon steel, the square taper washer delivers excellent compressive strength, impact resistance and long-term structural stability. The surface adopts professional blue-white electro zinc plating treatment, forming a uniform and dense zinc protective layer that effectively resists moisture, oxidation and mild corrosion, while keeping a neat bright silver appearance. These protective finishes greatly extend service life and maintain stable mechanical performance under indoor and mild outdoor construction operating environments.

The precision machined tapered inclined surface design perfectly matches the inclined contact surface of channel steel and I-beam, eliminating the gap between the fastener and the connected surface after tightening, effectively avoiding bolt bending and fracture caused by uneven force. The square outer shape prevents the washer from rotating during fastener tightening, improving installation stability and operational safety. This structure effectively reduces the risk of connection loosening and structural failure, greatly improving the overall stability of the steel structure and reducing long-term maintenance costs for construction projects.

Square taper washers are widely used for steel structure frame connection, channel steel and I-beam fastening, mechanical equipment base installation, automotive chassis assembly, bridge and highway engineering, industrial pipeline support and all kinds of profiled steel linkage connection systems. Their perfect inclined surface fit and reliable load-bearing performance make them the standard special fastening accessory for all steel structure and profiled steel connection projects requiring stable long-term fastening.

We provide OEM and ODM manufacturing services and support custom production according to customer drawings, samples, or special specification requirements. Customized inner diameters, outer square sizes, thicknesses, inclined surface angles, material grades and customized packaging options are available to meet unique project demands. Private labeling and custom branding printing services are also supported for hardware distributors, steel structure engineering companies, machinery factories and construction contractors.

Each zinc plated square taper washer is manufactured under strict fastener quality control standards and undergoes comprehensive dimensional inspection, inclined surface precision test and surface anti-corrosion inspection before shipment to ensure dimensional accuracy, perfect inclined surface fit and uniform qualified zinc coating for every product batch.