Stainless Steel Fender Washers
What are stainless steel fender washers? Stainless steel fender washers are flat washers with an oversized outer diameter relative to the hole, spreading load across thin or soft material like sheet metal and panels. Made from 18-8, 304, and 316 stainless, plus A2 and A4 metric, they resist rust in wet and outdoor use.
Stainless Steel Fender Washers
Standard Fender Washers
Corrosion-resistant general fender washers in 18-8, 304, 316, and metric A2/A4 stainless with a wide bearing surface for thin material.
Extra Thick Fender Washers
Heavier fender washers that add rigidity and load capacity while keeping the wide bearing surface.
Extra Heavy Fender Washers
The thickest, widest fender washers for spreading very high loads across soft or thin material without cupping.
Why the oversized diameter matters
A fender washer's large outer diameter spreads the fastener's clamping force over a much wider area than a standard flat washer, which stops the head or nut from pulling through thin sheet metal, soft wood, plastic, and oversized or slotted holes. The name comes from automotive body and fender work, but they are used anywhere the material is too thin or soft to hold on its own. Match the inner diameter to the bolt and the grade to the environment, with 316 or A4 for coastal exposure.
Why choose stainless steel fender washers
- Wide bearing: oversized diameter resists pull-through in thin material.
- Corrosion resistance: holds up in wet and outdoor use.
- Grade range: 18-8, 304, 316, and metric A2/A4.
- Versatile: works on metal, wood, plastic, and slotted holes.
Common applications for stainless fender washers
- Thin sheet metal and body panels
- Plumbing, automotive, and trailer work
- Oversized and slotted holes
- Marine and coastal hardware (316 or A4)
For standard load spreading, see stainless flat washers, and browse every size and finish on the main fender washers category.
Stainless Steel Fender Washers FAQ
What is the difference between a fender and a flat washer?
A fender washer has a much larger outer diameter relative to the hole, giving a wider bearing surface to resist pull-through in thin or soft material.
What grades do your fender washers come in?
Inch in 18-8, 304, and 316, and metric in A2 and A4. A2 is comparable to 304 and A4 to 316.
Which grade for coastal use?
Use 316 or metric A4 for coastal and saltwater exposure, since they resist pitting better than 18-8, 304, or A2.