Nylon Insert Locknut - Stainless 3/8-16
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You have 30 days to request a return. All sale items are final sale.
A stainless steel nylon insert locknut designed for 3/8-16 threads, helping resist loosening under vibration.
Key Features
- Stainless steel construction (18-8)
- Nylon insert lock design to help resist thread loosening
- Coarse-thread size: 3/8-16
Intended Use
- Marine and outdoor hardware assemblies where vibration may loosen standard nuts
- General-purpose fastening applications requiring a nylon-insert locknut
Product Details
- Product: Nylon Insert Locknut - Stainless 3/8-16
- Brand/Source label: LNS (Seachoice)
- Locknut style: Nylon insert (nylon-insert locknut)
- Thread size: 3/8-16
- Material: 18-8 Stainless Steel
- Pack/SKU detail: SKU 50-00627
- Variant details (from product data): weight 454 GRAMS
Parts Desk Insights
Best Use Case: Use on coarse-thread studs or bolts where you want a mechanical anti-loosening effect from the nylon insert, especially in vibration-prone setups.
Common Issues: Confirm thread size (3/8-16) before install; nylon-insert locknuts can require slightly higher torque to overcome the nylon’s added friction. If a nut feels unusually hard to thread, stop and verify the bolt/stud thread pitch and alignment.
Related Products & Accessories
- Fasteners & Mounting (browse category) - Explore additional marine fasteners and mounting hardware for your project.
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.