Attwood Lock'n-Pin 3/4in Boat Seat Post Base - Durable Stainless

In this review the Attwood Lock'n-Pin 3/4in Boat Seat Post Base SP-64839 is examined for boat owners who want a simple, durable mounting solution for non-threaded pedestal seats. The bottom line: this stainless steel top plate with a reinforcing steel lip tube and acetal bushing is best for anyone adding or replacing seating on a pontoon or fishing boat where a secure, corrosion-resistant base and straightforward installation matter most. It stands out for fit and build quality while remaining a no-frills, functional part rather than a full mounting kit.

Key Features

• Stainless steel top plate: delivers solid corrosion resistance and keeps the visible surface looking clean under typical marine conditions.
• Reinforcing steel lip tube: adds strength around the pedestal opening so the base resists deformation when used repeatedly.
• Acetal bushing: provides a snug, low-wear fit with a non-threaded pedestal pin for reliable seat retention.
• Clear coat finish: improves appearance and provides an extra barrier against surface corrosion in salt or freshwater environments.
• Six-bolt attachment: spreads load across the deck for a secure mount and reduces stress on any single fastener location.

Who It's For

The Lock'n-Pin 3/4in base is aimed at boat owners who already have a non-threaded pedestal or who want to add a removable seat post that locks in place. It suits pontoon, fishing and small cruising boats where a compact, low-profile seat base is needed and where buyers prefer a tested metal construction over lighter alternatives.

It is not ideal for someone who expects a complete mounting kit out of the box, since the hardware is not included, or for users who require a threaded pedestal solution. Buyers who need integrated bolts, adhesive backing or a different pin diameter should look at alternatives matched to those needs.

Pros & Cons

Pros

• Solid stainless steel top plate gives improved resistance to surface corrosion compared to plain steel.
• Acetal bushing ensures a good fit with non-threaded 3/4in pedestal pins and reduces wear.
• Clear coat finish and reinforced lip tube add durability and a finished look on deck.
• Six-bolt pattern spreads load for a stable seating mount.

Cons

• Mounting bolts or screws are not included, so additional hardware purchase is required.
• Some users report rusting on related components over time, so longevity depends on maintenance and environment.

Specifications

Our Verdict

The Attwood Lock'n-Pin 3/4in Boat Seat Post Base is a practical, well-built option for people adding removable seating to pontoons and fishing boats. It offers dependable fit and durability with its stainless top plate, reinforcing lip tube and acetal bushing, making it good value for owners who can supply their own mounting hardware and perform routine maintenance in corrosive environments.

Frequently Asked Questions

Does this base fit a 3/4in non-threaded pedestal?
Yes. The base is designed specifically to work with a 3/4in non-threaded pedestal pin and uses an acetal bushing for a secure fit.

Are mounting bolts included?
No. The product requires six screws or bolts through the deck but hardware is not included, so buyers must provide appropriate fasteners.

Is the top plate corrosion resistant?
Yes. The top plate is stainless steel with a clear coat finish, and a reinforcing lip tube helps durability, though exposed metal nearby can still require maintenance.