Rustproof Flat Washers Assortment Kit

This assortment kit provides 80–580 flat washers crafted from 304 stainless steel, available in metric sizes M2 through M12. Dimensions follow ISO 7089 standards for outer diameter, inner diameter, and thickness relative to nominal screw size. The washers are stored in a compact, transparent plastic case measuring approximately 12.8 cm × 6.7 cm × 2.3 cm (5.04" × 2.64" × 0.91"), with individual sections keeping sizes separated and visible at a glance. Their primary mechanical roles include spreading clamping force across a broader area than the bolt head alone, protecting softer base materials from deformation or abrasion, and contributing to more stable threaded joints by limiting micromotion. The inherent corrosion resistance of 304 stainless steel makes this kit especially appropriate for environments subject to humidity, temperature fluctuation, or incidental contact with water — such as kitchens, bathrooms, patios, garages, and engine bays. Suitable for a broad spectrum of applications including furniture reassembly, shelving installation, lighting fixture mounting, fence hardware, caravan maintenance, and small-scale fabrication — wherever consistent, long-lasting fastener support is needed without compromise.