18-8 Stainless Steel Extra Heavy Extra Thick Fender Washers
What are 18-8 stainless extra heavy extra thick fender washers? 18-8 stainless steel extra heavy extra thick fender washers are the heaviest-duty oversized washers, with an extra-large diameter and maximum thickness in corrosion-resistant 18-8 stainless. They deliver the greatest bearing area and stiffness for demanding thin-material and soft-surface joints while resisting rust.
Inner Diameter:
When do I need an extra heavy fender washer?
This is the heaviest fender washer, combining an extra-large outer diameter and maximum thickness with 18-8 stainless corrosion resistance. The wide, thick body spreads very high clamping loads across the largest surface while resisting cupping, dishing, and pull-through in soft or thin material, and the stainless grade keeps it rust-free outdoors and in freshwater. Use it for heavy structural repair, large-diameter fasteners on wood and composite, and any critical joint needing both maximum load spreading and durability. Pair it with 18-8 or 304 stainless hardware to keep the whole joint corrosion resistant.
Why choose 18-8 stainless extra heavy extra thick fender washers
- Maximum bearing: the widest, thickest fender washer for heavy loads.
- Corrosion resistant: 18-8 stainless resists rust in wet and outdoor use.
- Resists deformation: maximum stiffness against bending and dishing.
- Non-staining: will not rust-streak the mounting surface.
Common applications for 18-8 extra heavy extra thick fender washers
- Heavy structural repair and reinforcement
- Large-diameter fasteners on wood and composite
- High-load oversized and slotted holes outdoors
- Marine-adjacent and freshwater heavy-duty work
For a lighter version, see 18-8 stainless extra thick fender washers, and browse every option on the main fender washers category.
18-8 Stainless Extra Heavy Extra Thick Fender Washers FAQ
How is this different from an extra thick fender washer?
It adds even more material and diameter for the maximum bearing area and stiffness, suited to the most demanding heavy-duty load spreading.
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 a 316 option where available.
When do I need this over a standard fender washer?
Choose it for very high loads on soft or thin material, or where the widest, stiffest oversized washer is needed to prevent bending and pull-through.