Spring Washer

The Zinc Plated Heavy Duty Split Spring Lock Washer is a robust, heavy-load anti-loosening fastening accessory engineered to deliver sustained high elastic clamping force for bolt and nut connections on heavy machinery, construction steel frames, agricultural equipment and high-vibration industrial equipment. Constructed with a thickened open split circular spring structure made of high-toughness spring steel, this heavy-duty lock washer generates powerful continuous elastic rebound tension after compression, effectively counteracting vibration, shock and thermal expansion forces to stop fasteners from loosening under extreme heavy load operating conditions.

Manufactured from premium high-strength 65Mn spring steel, the thickened split spring lock washer boasts outstanding elastic recovery performance, superior compression fatigue resistance and long service life, and will not produce permanent deformation even after repeated long-term compression cycles. The surface is treated with professional blue-white electro zinc plating, forming a dense, uniform zinc protective barrier that blocks moisture, oxidation and mild corrosive substances, extending service lifespan and maintaining stable elastic performance in indoor and mild outdoor heavy-duty working environments.

The reinforced thickened split design provides far stronger elastic jacking force compared to standard thin spring washers. When tightened, the two cut ends firmly press against the nut and base surface separately, creating persistent friction locking force to offset vibration and impact loosening stress. It greatly reduces the risk of bolt loosening, sliding off and structural failure under heavy dynamic loads, significantly improving the overall safety and stability of heavy equipment connections. Standard inner bore sizes fully match all metric heavy-duty bolts, compatible with both manual assembly and automated mass production lines.

Heavy duty split spring lock washers are widely used for heavy mechanical equipment assembly, building steel structure fastening, truck and trailer component fixing, farm agricultural machinery linkage, hydraulic pump and valve installation, and all heavy-load mechanical systems that face persistent vibration and impact. Its enhanced load-bearing anti-loosening performance makes it the ideal elastic locking auxiliary fastener for heavy engineering projects.

We provide full OEM and ODM custom manufacturing services, supporting tailor-made production based on customer technical drawings, physical samples and special specification requirements. Custom inner hole diameters, wire thicknesses, outer diameters, plating thickness and exclusive export packaging options are available to meet unique heavy engineering project demands. Private labeling, laser marking and custom brand printing services are also offered for hardware distributors, heavy machinery manufacturers, construction contractors and agricultural equipment factories.

Each zinc plated heavy duty split spring lock washer is produced under strict heavy fastener quality control standards. All finished washers undergo full dimensional inspection, elastic fatigue rebound testing and surface coating uniformity inspection before shipment, to ensure precise dimensional tolerance, stable heavy-load elastic performance and uniform anti-corrosion zinc coating for every production batch.