RV Entry Door Holder Catch, Plunger and Socket Set

This is a two-piece catch that holds an RV entry door open. The plunger plate screws to the door and its stem ends in a bulb. The socket plate screws to the wall or frame and has a tapered cavity that the bulb snaps into with a light click. Pull the door to release it.

Each plate is about 45 x 45 mm with two screw holes 32 mm apart, so it can stand in for many common surface-mount door holders. It is a simple replacement for a broken or lost catch, not a precise copy of any one brand. Files: the socket (45 x 45 x 12 mm), the plunger (45 x 45 x 31 mm), and both parts side by side on one build plate.

Parameters: stem diameter 10 mm (the bulb is 4 mm wider), stem length 25 mm, interference 0.4 mm (how much wider the bulb is than the socket neck, which sets the snap force), screw holes 4.5 mm, countersunk to 9 mm. The bulb has a thin slit so it can squeeze through the neck. For a stiffer hold raise the interference by 0.1 mm at a time, or lower it for a lighter hold.

Print settings: PETG for interior use, or ASA if the part sees sun or heat. 0.2 mm layers, 4 walls, 40% infill, no supports. Print as exported, with the plates flat on the bed, the stem pointing up and the socket opening up. If the stem still snaps, print the plunger at 100% infill.

This is a free design offered as-is, with no guarantee of fit, and it has not been tested on the original hardware. Check the hole spacing and clearance on your door before printing.

Don't have a printer? PartRevive prints this and ships it: https://jdinneen.github.io/partrevive/parts/rv-door-holder-catch/