Direct answer: If you need a sturdy, universal base for 3/4″ pin posts on boats, these marine seat pedestal bases are among the most versatile options. They fit most standard seat pins and help stabilize seating on pontoon, fishing, bass, jon, and cruising boats. This guide highlights five top choices, who they’re best for, and practical buying cues to compare them quickly.
Buyer-friendly overview: The following table summarizes each product’s key fit, material focus, and best-use scenario to help you compare at a glance.
| Product | Best For | Material/Build | Notes |
|---|---|---|---|
| CLLOMAGY Boat Seat Base Mount | Pontoon and bass boats needing a secure base | Aluminum base with 7″ x 7″ mounting plate | Universal 3/4″ pin post socket; easy flush mounting |
| Swivl-Eze Lock’N-Pin SP-67739 | Stainless steel, corrosion-resistant base for tough marine use | Stainless steel, 7″ x 7″ base | Non-threaded; satin finish; solid mounting |
| Attwood 1002 Lock’N-Pin | Budget-friendly, reliable solid base | Black E-Coated steel; spring | 2-3/4″ pin; soft sit feature |
| CLLOMAGY Base Mount Kit | Complete kit for quick upgrade on multiple boats | Aluminum base; reinforced ribs | Includes 7″ x 7″ pedestal plate; 3/4″ pin post |
| attwood SP-67749 | Aluminum option with corrosion resistance | Brushed aluminum; 7″ x 7″ base | Rust-resistant; hardware not included |
CLLOMAGY Boat Seat Base Mount For 3/4″ Pin Post

The CLLOMAGY base is designed for 7″ x 7″ mounting and works with standard, non-threaded 3/4″ pin posts. It’s a strong option for pontoon, fishing, bass, jon, and cruiser boats, offering straightforward drilling and secure installation. Best for buyers needing a flush-mount pedestal base that stabilizes seats on deck or floor surfaces. Limitations include the requirement for a precise drilling pattern and a center post insertion to ensure smooth swiveling and secure seating.
Swivl-Eze Lock’N-Pin SP-67739 (Stainless)

This stainless steel, non-threaded base accepts a ¾” pin socket and uses a 7″ square base with a 2 ¾” mounting hole. It’s ideal for buyers seeking corrosion resistance and a sleek satin finish. Choose this if you want minimal maintenance and a robust base, but note that solid mounting hardware may be required separately.
Attwood 1002 Lock’N-Pin 3/4″ Seat Mount

Attwood’s base uses a 2-3/4″ steel pin with a spring for a softer sit and a black E-Coated finish with a 3-degree tilt. It’s best for buyers who want a reliable, straightforward base with a subtle tilt for comfort. Install height is about 2 inches, which keeps seats low and stable. Limitation: not ideal if you need a longer pin or additional tilt options.
CLLOMAGY Base Mount Kit with Lock

This kit pairs a 7″ x 7″ pedestal base with a 3/4″ pin post and integrated 13″ height option. It’s designed for heavy-duty use on pontoon, fishing, bass, jon, and cruiser boats, with alloy steel pin construction and reinforced ribs for higher load bearing. Best for boats that require a robust, corrosion-resistant solution and straightforward assembly. Caution: ensure the pin post interfaces match your seat hardware.
attwood SP-67749 Lock’N-Pin Aluminum Base

This aluminum base combines corrosion resistance with a brushed finish and includes six bolt or screw attachment points (hardware not included). It’s best for buyers prioritizing aesthetics and resistance to the marine environment. Best for mounting on boats where a lightweight, clean look matters. Limitation: hardware is not supplied, so you’ll need to source mounting screws or bolts separately.
marinexplore 7×7 Boat Seat Base Plate

Marinexplore offers a stainless steel 7″ x 7″ base designed specifically for 3/4″ pin posts. It emphasizes corrosion resistance and precise fit for 3/4″ pin sockets, reducing vibration and improving seat stability. Best for boats exposed to saltwater conditions. Limitation: screws are not included, so choose compatible fasteners for a secure mount.
CLLOMAGY 7×7 Base Pedestal with 3/4″ Pin Post

This heavy-duty base mounting solution fits most marine seats and features a 7″ x 7″ plate with a 3/4″ pin post socket. It’s suitable for pontoon, fishing, jon, and bass boats. Best for buyers upgrading or replacing worn bases with a sturdy, corrosion-resistant aluminum pedestal. Caution: ensure compatibility with your existing seat post hardware.
MATINA Boat Seat Base 7×7

MATINA’s 7″ x 7″ aluminum base is designed for 3/4″ pin posts, offering corrosion resistance and a secure seating solution for pontoon, fishing, or cruising boats. Best for buyers wanting a lightweight, durable base that reduces seat movement. Limitation: some setups may require additional bushing or adapters for perfect alignment.
Buying Guide
- Seat post compatibility: Ensure the base supports a standard 3/4″ pin post and matches your seat’s mounting hardware.
- Material choice: Aluminum bases excel in weight and corrosion resistance; stainless steel offers longevity in saltwater but may be heavier.
- Mounting method: Check if hardware is included and whether the deck requires drilling; flush-mount bases reduce snagging on walkways.
- Load and stability: Look for bases with reinforced ribs or thicker plates for higher load bearing on larger boats.
- Maintenance: Satin or brushed finishes resist corrosion and look cleaner over time; consider coatings (E-Coat) for extra protection.
FAQ
- What is the standard pin size for most boat seats?
– Most commonly 3/4″ pin posts are used with these bases. - Do these bases require screws or bolts to install?
– Some kits include all hardware; others require separate mounting screws or bolts. - Which base is best for saltwater use?
– Stainless steel or aluminum with corrosion-resistant finishes is recommended for saltwater environments. - Can I install these on a wood deck?
– Yes, if you drill the appropriate mounting holes and use suitable fasteners for your deck material. - Which base offers the softest seat feel?
– Bases with a built-in pin spring or softer sit design may feel more forgiving during use.