Forespar 251 Marelon Threaded Mushroom-Head Thru-Hull with Nut
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Forespar 251 Series Marelon Thru-Hull
White Marelon mushroom-head thru-hull with full NPSM threads and nut. Select the nominal thread size required for the installation. Each quantity is one thru-hull with nut.
- 906010: 1/2 in NPSM
- 906012: 3/4 in NPSM
- 906014: 1 in NPSM
- 906016: 1-1/4 in NPSM
- 906018: 1-1/2 in NPSM
- 906020: 2 in NPSM
These are unscreened 251-series fittings. Verify thread compatibility, hull thickness and model dimensions, and follow Forespar's installation instructions and bedding recommendations. Thread size is nominal and is not the hull cutout diameter.
Representative fitting shown; dimensions follow the selected model.
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.