The question comes up the same way every time. The entry lock on the camper has failed, the original brand is out of stock or discontinued, and a different brand's lock is sitting on a shelf. Will it fit?
Usually yes, and the reason is that the four brands that fit most North American RV entry doors build to the same two door cutouts. Whether a swap works is decided by a tape measure, not by the name on the box.
The two cutouts
RV entry door locks are made to fit a rectangular hole cut in the door, and a door thickness. The lock's outer flange has to cover the hole and the mechanism has to fit through it.
The standard cutout accepts the most common latch kit, which measures about 3.47 inches wide by 4.28 inches tall on its flange, fits doors from 1-1/4 to 1-1/2 inches thick, and covers cutouts from 2-1/2 by 3-1/2 inches up to 3 by 4 inches.
The larger cutout takes a latch measuring about 3-11/16 by 4-1/2 inches on the flange, for the same door thicknesses, and needs a cutout of 2-3/4 by 3-3/4 inches.
Those two sizes cover the great majority of entry doors on travel trailers, fifth wheels and off-road campers built for the North American market. If your door is one of them, a lock from any of the four brands built to that size will fit it.
Which brands are documented as direct swaps
Global Link and Bauer locks are documented by retailers who handle all four brands as direct replacements for TriMark standard entry door locks, and also for Lippert and Fastec, which is the FIC marking you may see on the lock body. In practice that means a single Global Link entry latch kit, made in black, chrome and white finishes, is sold as the replacement across the whole group.
The key words there are "standard entry door locks." The cross-fit applies to the ordinary rectangular paddle-handle entry lock. It does not automatically apply to:
- Compartment and baggage door locks, which are a different, smaller family with their own cutouts.
- Slide-out and cam-bar locks, which are mechanically different.
- Proprietary locks fitted by a manufacturer that builds its own, where the cutout may match nothing on the list.
- Electronic and keyless locks, which usually need their own cutout and wiring.
How to measure before you buy
Four numbers, taken from the door with the old lock removed.
- Cutout width and height. Measure the actual hole in the door, not the old lock's flange. The flange is bigger than the hole and will mislead you.
- Door thickness. Measure at the cutout. Most are 1-1/4 to 1-1/2 inches, but check, because a lock's bolt and the interior handle assembly are set for a range.
- The distance from the cutout to the edge of the door. The latch bolt has to reach the striker in the frame. A lock that fits the hole but whose bolt lands short of the striker is a lock that does not lock.
- The striker. Note whether the frame has a striker plate and what it looks like. Some kits include one; some assume yours stays.
With those four numbers, the fit question answers itself, and you can order the right kit from any of the four brands rather than the one that happens to be in stock.
Keyed alike, and the lock cylinder question
When the lock is replaced, the key changes, unless you specify otherwise. Two things worth knowing:
- Keyed-alike sets exist across the brands for owners who want one key for the entry door and the compartments. Ask for it when ordering, because it is not the default.
- The cylinder is sometimes replaceable on its own. If the mechanism is sound and only the cylinder is worn, a new cylinder is cheaper than a new lock and keeps your existing key. Our guide to RV door lock troubleshooting covers the sticky-lock and worn-key cases where that is the right call.
Fitting notes that decide whether it lasts
- Seal the flange to the door. Water that gets behind the lock flange rots the door core. A bead of sealant around the flange, or the gasket the kit supplies, is not optional.
- Do not overtighten into a thin skin. The screws bite into the door's inner frame or a backing plate, not the outer skin. Stripped holes here are the most common reason a lock loosens.
- Check the striker alignment before final tightening. Close the door on the latch and confirm the bolt enters cleanly. Adjust the striker, not the lock, to fix a misalignment.
- Lubricate the cylinder with a dry lubricant, not oil. Oil attracts dust, and on an off-road camper that is a cylinder that jams within a season.
Where Black Series fits in this
Black Series campers use their own entrance lock, and it is not one of the four brands above. If you have a Black Series, the cross-fit table does not apply to you, and the right parts are the genuine ones: the entrance door lock and key, the 2019 to 2021 door lock assembly for those years, the external door lock for compartments, and the cam bar lock on the TH19 and TH22. Fitment by year is in the Black Series door lock fitment guide.
What we stock, plainly
We carry the genuine Black Series entry and compartment locks above. We do not currently stock the TriMark, Bauer, Global Link or FIC entry lock kits this guide is about, so if your door takes one of those, you will be sourcing it elsewhere. The measuring method above still decides which one, and if you send us the four numbers we will tell you which cutout you have before you buy.
Everything we stock ships from Upland, California.