Identify Attwood 238 Boat Seat Mounts & Pedestal Bases

Attwood's 238 Series marine-seat hardware includes several mounts and deck bases that look alike but carry different manufacturer part numbers. Use the shape of the base, position of the seat-mount handle and the original number to narrow down a replacement.

Identify Attwood 238 Series components

Round, D-shaped or square deck base?

The round 238312-1 and 238312-2 bases have a 9-inch aluminum profile; 238322-1 is a D-shaped aluminum base, while 238333-1 has a 7 × 7-inch stainless square plate. The listed bases are specified for matching 2-3/8-inch posts and require a 3-inch deck mounting opening. The opening size does not describe the position of the fastener holes.

For the seat-side fitting, the 238152-1 and 238152-7 have right-hand controls, while the 238153-7 uses a forward-positioned handle. Their shared 3° tilt does not establish that their part numbers are interchangeable.

Checks before replacing a seat component

1. Find the stamped or printed original part number. Keep the number suffix when searching.
2. Look at the release handle from the operator's seated position: right-side or forward-facing.
3. Measure the existing post and compare the pedestal-base shape and required opening.
4. Check the installation's screw pattern and clearance below the deck. A matching post diameter does not confirm bolt-hole alignment.
5. Confirm the complete seat installation is suitable for its intended position; the listed 238-series items have an AO component classification, but complete assemblies still need appropriate matching parts.
6. Review the exact product listing for condition, availability and included components.

Attwood part-number listings

The following links open the corresponding UsedRVParts product records, including brand-new items listed in this catalog. An item shown here is not necessarily used; check each listing's condition and availability. Eligible local viewing and pickup in Kelowna are by appointment.

Attwood 238152-1

Right-handle seat mount

Plated steel, 3° tilt, no slider

Check exact listing

Attwood 238152-7

Right-handle seat mount

Another exact MPN to identify; compare the stamped suffix

Check exact listing

Attwood 238153-7

Forward-handle seat mount

Forward release-handle location, 3° tilt

Check exact listing

Attwood 238312-1

Round aluminum base

9-inch round socket base for matching 2-3/8-inch post

Check exact listing

Attwood 238312-2

Round aluminum base

9-inch round socket base, clear-coated aluminum

Check exact listing

Attwood 238322-1

D-shaped aluminum base

9-inch base profile with 3-inch mounting opening

Check exact listing

Attwood 238333-1

Square stainless base

7 × 7-inch square plate with 3-inch mounting opening

Check exact listing

Related identification pages

For other marine hardware, see Attwood pull-up and retractable cleats or Attwood fishing rod holders by angle.