Stainless External Tooth Lock Washer 5/16"
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A 5/16" stainless external tooth lock washer that helps resist loosening by biting into the mating surface for a more secure clamp.
Key Features
- Stainless steel construction for corrosion-resistant fastening applications
- External tooth design helps improve grip on the outside surface of the joint
- Nominal size: 5/16" (washer for 5/16" hardware size)
Intended Use
- Marine and boating hardware installations
- General fastening and mounting where a 5/16" external tooth lock washer is needed
- Use with stainless hardware when you want a locking washer style for vibration resistance
Product Details
- Brand/model line: Seachoice (50-01023)
- Product: Stainless External Tooth Lock Washer
- Size: 5/16"
- Material: 410 stainless steel (per product SEO description and Seachoice catalog listings)
- SKU on product: 50-01023
Parts Desk Insights
Best Use Case: Best for fastening applications that see vibration where you want the washer’s external teeth to help resist backing out over time.
Common Issues: If the teeth cannot fully contact the mating surface (paint, plating mismatch, or uneven contact), the locking action may be reduced—verify the washer sits flat and teeth contact metal.
Related Products & Accessories
- Browse Lock Washers & Fastener Hardware Accessories - Find matching washer types and sizes in the Fasteners & Mounting collection.
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.