18-8 Stainless Steel Extra Thick Fender Washers

Why use a stainless extra thick fender washer?

This washer brings together three things: an oversized outer diameter that stops nuts and bolt heads from pulling through thin material, extra thickness that resists cupping and dishing under load, and 18-8 stainless corrosion resistance for outdoor and freshwater use. It is the choice where a standard fender washer would flex, on soft wood, composite, and higher-load thin-sheet joints. Pair it with 18-8 or 304 stainless bolts and nuts so the whole joint shares the same corrosion resistance. For coastal or saltwater exposure, choose 316 or metric A4 where available.

Why choose 18-8 stainless extra thick fender washers

• Wide and stiff: oversized diameter plus added thickness.
• Corrosion resistant: 18-8 stainless resists rust in wet and outdoor use.
• Resists bending: extra material holds shape under load.
• Non-staining: will not rust-streak the mounting surface.

Common applications for 18-8 extra thick fender washers

• Higher-load thin-material joints
• Soft wood and composite mounting outdoors
• Oversized and slotted holes under load
• Marine-adjacent and freshwater heavy-duty work

For the heaviest version, see 18-8 stainless extra heavy extra thick fender washers, and browse every option on the main fender washers category.

18-8 Stainless Extra Thick Fender Washers FAQ

When should I use an extra thick fender washer?

Use one where a standard fender washer would flex or cup under load, or where a stiffer, corrosion-resistant oversized bearing surface is needed.

Is 18-8 good for coastal use?

18-8 handles most outdoor and freshwater exposure but can pit in salt. For coastal or saltwater use, choose 316 or metric A4 where available.

How is this different from an extra heavy fender washer?

Extra heavy extra thick fender washers add even more material and diameter for the most demanding heavy-duty load spreading.