Overview

The Attwood Marine SP-67739-T is a 7" x 7" zinc-plated steel pedestal base plate for SWIVL-EZE Lock'N-Pin 3/4" threaded seat pedestals. It mounts flush to the deck and gives you a fixed base for a seat setup that needs a threaded 3/4" Lock'N-Pin connection rather than a simple drop-in post.

This is the kind of base used when you are replacing a worn deck plate or adding another seating position on a pontoon, fishing boat, or cruising boat. The square 7" x 7" footprint spreads load across the mounting area, and the six-hole deck attachment pattern gives you a straightforward way to bolt or screw it down to a properly reinforced surface.

Key features

• Fits SWIVL-EZE Lock'N-Pin 3/4" threaded pedestal systems
• 7" x 7" square base plate for a broad deck footprint
• Zinc-plated steel construction
• Flush-mount deck plate with six attachment points
• Threaded base connection adds a more secure seat-to-base engagement

Compatibility and fit

This base is for seat systems built around the Attwood SWIVL-EZE Lock'N-Pin 3/4" threaded standard. Before ordering, match the pedestal style and thread type in your current setup, not just the outside post size. That matters most on replacement jobs where the seat, pedestal, and deck plate may have come from different generations or brands.

The 7" x 7" footprint works well where you have enough flat deck area to support the plate and the fasteners below it. On smaller casting decks, storage lids, or thin fiberglass sections, check clearance underneath and make sure the mounting surface can take the load of the seat and passenger in rough water.

Installation and setup

Installation is straightforward once the mounting position is set. The plate fastens through six holes, so it is worth taking time to line it up with the seat position, helm access, and under-deck structure before drilling. A solid backing surface is important on boats that see chop, repeated seat movement, or heavier occupants.

For refits, this base makes sense when the rest of the seating hardware is still built around the 3/4" Lock'N-Pin threaded format and you want to keep the system consistent. It is also a practical choice when adding a second seat location for fishing, cruising, or extra passenger seating without changing the rest of the pedestal hardware.

Use on board

This base suits owners who need a simple deck plate for a compatible pedestal seat on pontoons, center consoles, and small cruising boats. It is especially useful where the priority is a known 3/4" Lock'N-Pin fit and a deck plate that can be mounted cleanly without moving to a different seat system.