Attwood Lock-N-Pin Base Plate, 4" x 8" (SP64839)
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You have 30 days to request a return. All sale items are final sale.
Attwood Lock-N-Pin Base Plate, 4" x 8" (SP64839)
The Attwood SP64839 is a 4" x 8" base plate designed for use with the Attwood Lock-N-Pin pedestal system. It mounts to the boat deck and accepts a compatible Lock-N-Pin post, locking together to prevent unintentional detachment of the pedestal during use. The rectangular 4" x 8" footprint suits installations where a narrower mounting profile is needed — such as along a gunwale, in a tight console space, or on a bench seat riser.
- 4" x 8" rectangular base plate footprint
- Lock-N-Pin locking mechanism prevents unintentional pedestal detachment
- Designed for use with Attwood Lock-N-Pin posts and pedestals
- Mounts to flat deck surfaces
- Attwood Lock-N-Pin system compatible
Related Lock-N-Pin & Attwood Base Products
- Attwood Lock-N-Pin Base Plate, 6" x 8"
- Attwood SP67739 Lock-N-Pin Base Plate, 7" x 7"
- Attwood 67729T Lock-N-Pin 3/4" Base Plate, 7" x 7", Threaded, Zinc Plated
- Attwood 67739 Lock-N-Pin 3/4" Stainless Base Plate, 7" x 7", Bulk
- Attwood Lock-N-Pin 3/4" Post, 24", Non-Threaded
- Attwood Lock-N-Pin 3/4" Power Pedestal, 24–30", Stainless Steel Pin, Threaded
Parts Desk Insights
Best use case: The 4" x 8" base plate is the right choice when deck space or mounting location constrains you to a narrower footprint — common on smaller boats, bench seat risers, or gunwale-mounted seat positions where a square 7" x 7" base won’t fit. If your installation has more deck space available, the 6" x 8" or 7" x 7" base plates offer a wider, more stable footprint. Always confirm the post pin diameter (3/4") and thread type match your Lock-N-Pin post before ordering the base plate.
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.