Attwood Lock'N-Pin Boat Seat Posts: Heights & Threading
Need a taller or shorter Attwood boat-seat pedestal? Lock'N-Pin posts are sold in multiple heights, with threaded and non-threaded pin connections. Start with the pedestal system and the existing base, then choose the post height and connection. A matching diameter alone does not confirm an interchangeable part.
Understand the three-piece seating system
Seat mountSecures to the underside of the seat. Select the Attwood mount that belongs to your original pedestal system.
Pedestal postProvides the specified height and carries the Lock'N-Pin connection. The post tube in this comparison is 1½ inches in diameter.
Deck baseAnchors to the deck and must accept the exact threaded or non-threaded pin type. Check its opening and fastening pattern separately.
Attwood Lock'N-Pin post heights and connections
Each listed model uses a brushed-aluminum tube, a steel pin and Attwood's Type B seating classification. The 3/4-inch system designation refers to the locking-pin hardware, not the 1½-inch post tube.
| Part number | Post height | Design | Pin connection |
|---|---|---|---|
| 2064 | 6 in | Fixed | Non-threaded |
| SP-2114-T | 11 in | Fixed | Threaded |
| 2134 | 13 in | Fixed | Non-threaded |
| SP-2134-T | 13 in | Fixed | Threaded |
| SP-2164 | 16 in | Fixed | Non-threaded |
| 2164-T | 16 in | Fixed | Threaded |
| SP-2244 | 24 in | Fixed Pro-Post | Non-threaded |
| SP-2244-ADJ | 25–31 in | Manual adjustable Pro-Post | Non-threaded |
Selection tip: The 13-inch 2134 and SP-2134-T are not the same connection. Likewise, SP-2164 is non-threaded, while 2164-T is threaded. Check the original part number, not just the height.
Check these details before ordering
- Match the base: identify whether the existing Lock'N-Pin deck socket is threaded or non-threaded.
- Match the mounting system: the post tube is 1½ inches on these models; Attwood's 238 Series uses a separate 2⅜-inch system.
- Choose the height: compare the existing pedestal's specified post height and the seat's required position rather than assuming a post adds exactly that amount to the installed seat height.
- Know the adjustment type: SP-2244 is fixed at 24 inches; SP-2244-ADJ adjusts manually from 25 to 31 inches.
- Check the seating location: these are Type B components, not intended for helm or driver seats. Attwood advises against mixing Lock'N-Pin components with those of other manufacturers.
- Review each product page: confirm what is supplied with the specific listing; do not assume seat mounts or bases are included with a replacement post.
Shop the matching Attwood pedestal posts
The product cards below link to exact manufacturer part numbers in the NewRVParts catalog. Items ship from supplier warehouses; warehouse pickup and viewing are not offered.
Attwood SP-2244-ADJ
Manually adjustable 25–31-inch Pro-Post
Non-threaded connection · Manual adjustable Pro-Post
View exact postFind the corresponding base
Need to identify the deck socket before selecting a post? See our Attwood Lock'N-Pin threaded vs non-threaded base guide. For the larger post system, consult the 238 Series seat mounts and socket bases guide.
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