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
| Part number | Identify by | Distinguishing detail |
|---|---|---|
| 238152-1 | Right-handle seat mount | Plated steel, 3° tilt, no slider |
| 238152-7 | Right-handle seat mount | Another exact MPN to identify; compare the stamped suffix |
| 238153-7 | Forward-handle seat mount | Forward release-handle location, 3° tilt |
| 238312-1 | Round aluminum base | 9-inch round socket base for matching 2-3/8-inch post |
| 238312-2 | Round aluminum base | 9-inch round socket base, clear-coated aluminum |
| 238322-1 | D-shaped aluminum base | 9-inch base profile with 3-inch mounting opening |
| 238333-1 | Square stainless base | 7 × 7-inch square plate with 3-inch mounting opening |
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.
Identification tip: The 238 Series 2-3/8-inch system is different from Attwood's smaller 3/4-inch Lock'N-Pin hardware. Match the complete assembly and mounting details rather than buying by plate shape alone.
Checks before replacing a seat component
- Find the stamped or printed original part number. Keep the number suffix when searching.
- Look at the release handle from the operator's seated position: right-side or forward-facing.
- Measure the existing post and compare the pedestal-base shape and required opening.
- Check the installation's screw pattern and clearance below the deck. A matching post diameter does not confirm bolt-hole alignment.
- 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.
- 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 238152-7
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 listingRelated identification pages
For other marine hardware, see Attwood pull-up and retractable cleats or Attwood fishing rod holders by angle.
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