Lag Screw, 3/8 x 4"
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Secure marine and outdoor components with this Seachoice lag screw—3/8" diameter x 4" length, hot dipped galvanized for corrosion resistance.
Key Features
- Lag screw size: 3/8" x 4"
- Hot dipped galvanized finish helps resist corrosion in marine/outdoor environments
Intended Use
- Marine and boating hardware mounting
- Outdoor/pressure-treated lumber and general exterior fastener applications
- Accessory and bracket installation where a lag screw is appropriate
Product Details
- Product: Lag Screw, 3/8 x 4"
- Finish: Hot Dipped Galvanized
- SKU: 50-01521
- Brand: LNS (Seachoice)
- Variant SKU: 50-01521
Parts Desk Insights
Best Use Case: Use when you need a lag screw-style fastener to anchor brackets, hardware, or other components into suitable materials—then pair with the right pilot hole size and mating hardware for a secure, straight pull.
Common Issues: Overdriving can strip threads or distort the material; if the pilot hole is too small, starting can be difficult and can lead to misalignment or splitting. Always confirm you’re using the correct pilot hole and that the work surface is sound and properly supported.
Related Products & Accessories
- Fasteners & Mounting - Browse the fasteners and mounting category for compatible washers, pilot-hole tools, and additional 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.