An unmarked RV compartment cylinder should be identified by its barrel length and operating style before you look for a matching cam. JR Products' Deluxe range includes hand-operated thumb turns and key-operated J236 cylinders in four lengths. The MPN, not just the chrome face, tells you which one was originally fitted.

Identify Deluxe thumb or keyed cylinders

Each row is a distinct JR Products manufacturer number. All sizes are nominal cylinder lengths, not cam reach or total assembly depth.

JR MPN Nominal length Operation Key style
00115 5/8 in Thumb-turn No key
00155 5/8 in Key-operated Double-sided J236
00125 7/8 in Thumb-turn No key
00165 7/8 in Key-operated Double-sided J236
00135 1-1/8 in Thumb-turn No key
00175 1-1/8 in Key-operated Double-sided J236
00145 1-3/8 in Thumb-turn No key
00185 1-3/8 in Key-operated Double-sided J236
Thumb-turn and keyed are different choices. The 00115–00145 models operate by hand without a key. The 00155–00185 models use a double-sided J236-style key. They are manufacturer-listed for flat and offset cam-blade arrangements, but actual latch reach and door-panel fit must still be checked.

Check the original before replacing it

  • Measure the removed barrel: compare the original nominal length with 5/8, 7/8, 1-1/8 or 1-3/8 inch; do not include the thumb projection or key head.
  • Check the operation: a thumb-turn is a hand-operated catch, while a J236 cylinder is key-operated.
  • Inspect the cam: compare a flat blade with an offset blade and note its reach to the compartment striker.
  • Compare the panel: verify the mounting hole, panel thickness, retaining nut and clearance behind the door.
  • Do not rely on the key alone: a matching J236 key style does not establish that the replacement barrel length will work.

Matching part-number listings

Each card opens the exact UsedRVParts product. Check its stated condition and current availability; viewing and pickup in Kelowna are by appointment.

For the other key/operation series, see the standard 751-key cylinder identification chart. To compare alternative cam-lock construction and key styles, see the RV Designer cam-lock identification guide. Match the complete cam and door panel before substituting a different brand.

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