Plain washers — also called flat washers or fender washers depending on the application — are among the simplest yet most important fasteners. JLHY's plain washers provide consistent bearing surface that prevents surface damage, distributes load, and allows smooth, controlled tightening of the fastener.

In bolted connections, the clamping force acts on the washer rather than directly on the connected material. This ensures uniform pressure distribution that achieves the full intended clamp load and maintains it over the life of the joint. Without washers, bolt heads or nuts can embed into the material, reducing clamp load over time.

Produced in carbon steel (zinc plated), stainless steel A2 and A4, and aluminium. Both standard-series and oversize-series available. JLHY maintains tight thickness tolerances since washer thickness directly affects clamp load calculation accuracy.