Stainless Countersunk Finishing Washer, #5/16
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Finish your installation with a stainless countersunk finishing washer designed for a clean, flush look. This #5/16-size washer is made from 18-8 stainless steel for corrosion resistance in marine environments.
Key Features
- Countersunk finishing washer for a flush, finished appearance
- #5/16 size for the intended fastener application
- 18-8 stainless steel construction for corrosion resistance
Intended Use
- Marine and boat hardware installations requiring countersunk finishing washers
- General fastener mounting where a #5/16 countersunk washer is needed
Product Details
- Product Type: Bulk Fasteners
- Finish/Style: Countersunk finishing washer
- Size: #5/16
- Material: 18-8 stainless steel
- Stainless countersunk finishing washer SKU: 50-00957
- Variant Barcode Note: Barcode is present on the variant data but is not displayed on the customer-facing page
- Weight: 227 grams (variant weight)
- Variant Quantity/Packaging Detail: Catalog sources list Item #00957 as packed 50 per bag and 10 per case (confirm packaging preference against the exact fulfillment unit you require).
Parts Desk Insights
Best Use Case: Use on projects where you want the washer head to sit neatly in a countersunk surface for a more finished look.
Common Issues: Common fitment concerns are typically related to using the wrong countersink geometry (the fastener head/seat should match) and ensuring the washer size matches the fastener size (#5/16 here).
Related Products & Accessories
- Fasteners & Mounting - Browse related fasteners and mounting hardware to pair with this washer.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.