Springfield Jon Boat Seat Clamp

Bases & Hardware - The Springfield Jon Boat Seat Clamp features a 360° clamp-style swivel fits an 8 to 21 tank or boardtype seat.

Cheapest Adjustable Boat Seat Post on ! - Springfield Marine Kingpin

The SPRINGFIELD Adjustable Jon Boat Seat Clamp is a removable mounting solution that makes it easy to transform uncomfortable bench seats into your new favorite place to sit. Simply attach the adjustable clamps to your bench seat and tighten the wing nuts for a secure connection that won't budge. Includes a heavy-duty swivel-action seat mount with a 4-hole mount pattern that fits most standard boat seats.

Springfield Marine Economy Adjustable Jon Boat Seat Clamp - 8 inch to 20.5 inch W1100012

Springfield Jon Boat Seat Clamp w/Swivel SPM-1104010

Springfield Jon Boat Seat Clamp

Cheap Jon Boat Seat Mounts - review of clamp on swivel style seat base

Springfield Jon Boat Seat Clamp - 8 to 20-1/2 [1104010]

Springfield Marine Economy Adjustable Jon Boat Seat Clamp - 8 inch to 20.5 inch W1100012

The SPRINGFIELD KingPin 7 inch x 7 inch Aluminum Base is made with high-strength aluminum that has a brushed satin finish. This base requires a 3-1/2 inch diameter hole that extends 2-1/2 inch below deck. This Standard (non-threaded) KingPin deck bases contain a bushing that accepts KingPin posts and seat mounts for fishing in the Hi-Lo seating positions. Simply plug a Standard KingPin seat mount directly into a Standard KingPin base to sit in the Lo position.