Industrial machinery places extreme demands on bolted joints. JLHY's heavy duty washers are engineered to provide superior load distribution and bearing surface protection in high-load, high-vibration, and often high-temperature environments found in heavy machinery, mining equipment, and industrial plant installations.

These washers are thicker and have a larger outside diameter than standard flat washers, providing greater resistance to plastic deformation under sustained high compressive loads. The larger bearing area reduces surface pressure on the connected material, preventing the washer from embedding into softer substrates like cast iron, aluminium, or polymer components in the machinery frame.

JLHY's heavy duty washers are manufactured from heat-treated carbon steel with zinc plating or from stainless steel A4. The controlled thickness and hardness ensure consistent performance in preload calculations — a critical factor in machinery assembly where bolt preload must be precisely controlled for gaskets, bearing housings, and structural joints.

We also offer extra-thick slotted heavy duty washers for applications involving large thermal expansion differentials. Custom sizes, geometries, and materials are available for OEM machinery builder projects. Contact our industrial sales team for heavy duty washer specifications, technical support, and volume pricing.