✓ In stock Zinc-plated steel fender washer for 1/4" fastener applications. The 1" outer diameter provides a wide bearing surface that distributes clamping load across a larger area, preventing bolt or screw heads from pulling through thin body sheet metal, plastic panels, and soft trim materials. The 9/32" inner diameter fits 1/4" fasteners with appropriate clearance for easy installation. Specifications Type: Fender Washer Bolt Size: 1/4" Outer Diameter: 1" Inner Diameter: 9/32" Material: Steel Finish: Zinc Vehicle Fitment Universal — 1/4" fastener applications across domestic and import vehicles Cross-Reference Numbers Bolt Size: 1/4" (6.4mm) SMS Part#: 16020 What is a fender washer and when should I use one? A fender washer has a much larger outer diameter relative to its hole size compared to a standard flat washer. This extra bearing surface distributes bolt clamping load across a wider area — critical for thin sheet metal, plastic, or soft material fastening where a smaller washer would allow pull-through. Use them when repairing oversized holes, attaching trim brackets, or fastening underbody components to thin panels. What is the difference between the 1183 (3/16") and 16020 (1/4") fender washers? The 1183 has a 3/16" inner hole for smaller 3/16" fasteners, while the 16020 has a 9/32" inner hole sized for 1/4" fasteners. The 1/4" washer (16020) also has a 1" outer diameter, giving it a wider bearing surface. Use the correct size for your fastener to ensure proper fit and clamping geometry. Can fender washers be used with bolts and screws? Yes. Fender washers are compatible with any 1/4" bolt, machine screw, or sheet metal screw. They are commonly used under bolt heads or nuts to spread load, as backing washers on the far side of a panel, or as spacers in trim and hardware attachment applications. Are these washers suitable for exterior use? Yes. The zinc plating provides corrosion resistance for moisture-exposed exterior locations including underbody panels, rocker attachments, and exterior trim hardware. For highly corrosive environments, consider stainless steel washers instead. What pack sizes are available? Available in packs of 100, 200, 300, and 400 to suit individual repairs or shop stock needs.
