Attwood 238 Series Boat Seat Mounts & Socket Bases
Attwood's 238 Series boat-seat hardware is built around a 2-3/8-inch pedestal post. The mount at the seat and the socket base at the deck serve different jobs, so replacing one component starts with identifying the original system, not just measuring the visible plate.
Know where each piece goes
At the seatThe 238152-1 is a right-handle, 3°-tilt seat mount without a fore-and-aft slider.
Between seat and deckA compatible 238 Series pedestal post connects the seat mount to the socket below. A pedestal post is not included with the three individual items shown here.
At the deckChoose the 9-inch round aluminum 238312-2 or the 7 × 7-inch square stainless 238333-1 base to match the original mounting arrangement.
Attwood 238 Series part comparison
| Manufacturer part | Component | Key distinction |
|---|---|---|
| 238152-1 | Seat mount | Right-side handle, plated steel, 3° tilt, no slider |
| 238312-2 | Round socket base | 9-inch round, clear-coated aluminum; 3-inch mounting hole |
| 238333-1 | Square socket base | 7 × 7-inch stainless steel, centred opening; 3-inch mounting hole |
Attwood specifies a 3-inch required mounting hole for these 238 Series socket bases. That is the deck opening, not a bolt-circle measurement. Confirm the existing fastener pattern and installation space before drilling.
What to check before ordering
- Confirm the complete part number on the old seat mount or socket base. A right-side release handle is not the same configuration as a forward-handle version.
- Check the pedestal system and post diameter. A 3/4-inch Lock'N-Pin component is not a replacement simply because it is also Attwood seat hardware.
- Compare base shape, deck cutout and screw-hole positions, including space beneath the deck for the socket.
- The listed 238 Series components carry Attwood's AO (operator-position) classification. A seat installation must still be assessed as a complete system; a component rating alone does not confirm the whole assembly.
Shop the matching components
These links lead to the exact Attwood manufacturer part numbers in the NewRVParts catalog. Products are shipped from supplier warehouses; in-person warehouse viewing or pickup is not offered.
Attwood 238312-2
Round socket base
9-inch round, clear-coated aluminum; 3-inch mounting hole
See product details
Attwood 238333-1
Square socket base
7 × 7-inch stainless steel, centred opening; 3-inch mounting hole
See product detailsMore marine hardware guides
Also comparing deck fittings? See our Attwood boat cleat guide and Attwood fishing-rod-holder guide.
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