Identify Attwood Lock'N-Pin Posts

When a boat-seat pedestal is missing, bent or the wrong height, the existing base does not tell the whole story. Attwood Lock'N-Pin posts use several heights and either a threaded or non-threaded steel pin. Compare the old post, seat mount and deck socket as a set before choosing a replacement.

Identify the post by length and pin style

These Attwood Lock'N-Pin models use 1½-inch aluminum post tubes. The ¾-inch designation applies to the locking-pin seating system; it is not the outside diameter of the tube. Compare the complete part number rather than treating every similarly sized post as interchangeable.

Attwood MPN	Specified height	Base connection	Post style
2064	6 in	Non-threaded	Fixed
2114	11 in	Non-threaded	Fixed
SP-2114-T	11 in	Threaded	Fixed
2134	13 in	Non-threaded	Fixed
SP-2134-T	13 in	Threaded	Fixed
SP-2164	16 in	Non-threaded	Fixed
2164-T	16 in	Threaded	Fixed
SP-2244-ADJ	25–31 in	Non-threaded	Manual adjustable

Look for the “-T” ending: SP-2114-T, SP-2134-T and 2164-T use a threaded pin. The listed 2114, 2134 and SP-2164 are non-threaded. Posts with the same height can require different deck bases.

Replacement identification checklist

Identify the pin: check whether the existing post screws into the base or uses a non-threaded lock connection. A similar-looking seat base can conceal a different connection.
Read the marking: compare every letter and suffix on the pedestal with the chart. Do not substitute SP-prefixed and unprefixed numbers without checking the exact replacement.
Compare the tube and height: these posts have 1½-inch tube diameters, but advertised post height is not a promise of identical installed seat height across different assemblies.
Examine the seat-side fitting: verify the original seat mount and whether its locking hardware is intact. A separate post does not automatically include a seat mount or a deck base.
Check position and load requirements: the listed Type B posts are not intended for the helm or driver position, and mixed-manufacturer assemblies should not be assumed safe.
Check the listing: confirm availability, condition and supplied parts before purchasing a replacement.

Compare exact Attwood parts

The linked products are specific manufacturer part numbers listed on UsedRVParts. These particular listings are marked Brand New, so the store name does not indicate their condition. Eligible local viewing and pickup in Kelowna are by appointment.