Cap Screw - Hex Head, 3/8"-16 x 5"
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You have 30 days to request a return. All sale items are final sale.
Keep hardware secure with a durable Seachoice hex head cap screw sized for 3/8"-16 threads and 5" length—an ideal choice for marine fastener replacements where corrosion resistance matters.
Key Features
- Hex head cap screw for straightforward wrench/driver access
- 3/8"-16 coarse thread size
- 5" length for appropriate stack-up/through-hole applications
- 18-8 stainless steel for corrosion resistance
Intended Use
- Marine fastener replacements
- Boat and marine hardware mounting
- General-purpose equipment and hardware assemblies (3/8"-16 x 5" cap screw requirement)
Product Details
- Brand/Category: Seachoice (LNS) • Bulk Fasteners
- Type: Cap Screw - Hex Head
- Thread Size: 3/8"-16
- Length: 5"
- Material: 18-8 Stainless Steel
- SKU: 50-00059
Parts Desk Insights
Best Use Case: Use this cap screw when your assembly calls specifically for a 3/8"-16 hex head cap screw with a 5" length, especially in wet or salt-air environments where stainless hardware helps resist corrosion.
Common Issues: If the fastener doesn’t seat fully or threads don’t engage, verify the mating thickness/stack-up for the required 5" length and confirm you’re matching the 3/8"-16 coarse thread (not a fine-thread size). Also check whether your installation needs matching nuts/washers and appropriate corrosion protection on mating parts.
Related Products & Accessories
- Related Fasteners & Mounting Hardware - Browse the Fasteners & Mounting collection for matching nuts, washers, and additional bulk hardware.
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.