Start with what the lock is designed for
The Thumbturn Lock / Linear is an indoor thumbturn lock made from solid metal. It works on all internal bathroom and toilet doors and includes a safety coin-release. That scope matters: this is a privacy fitting for internal doors, not an exterior or security lock.
The catalog also states that it looks sublime combined with matching linear door handles. If you are planning a coordinated bathroom door, that pairing is part of the design decision as well as the fitting decision.
Catalog evidence for the Linear thumbturn
- THUMBTURN LOCK / LINEAR: An indoor thumbturn lock made from solid metal with a solid knob and tactile diamond-cut linear knurling. Confirms the product type and the tactile knob design you are fitting, so you can match it to the door's intended use.
THUMBTURN LOCK / LINEAR - THUMBTURN LOCK / LINEAR: Works on all internal bathroom and toilet doors and includes a safety coin-release. The coin-release is the key privacy-lock feature to understand before fitting, because it provides outside release in an emergency.
- THUMBTURN LOCK / LINEAR: Available in BRASS, STEEL and WELDERS BLACK finishes. Finish choice affects the look of the door and should be settled before any drilling or ordering.
Fitting questions to resolve before you drill
- Is the door internal and used as a bathroom or toilet door?: The catalog confirms the lock works on all internal bathroom and toilet doors. If your door is external or serves another purpose, the supplied information does not confirm suitability.
- Do you have the matching linear door handle?: The catalog says the lock looks sublime combined with matching linear door handles. Decide the handle pairing before fitting so the door furniture is coordinated.
- Which finish will you fit?: The lock comes in BRASS, STEEL and WELDERS BLACK. Choose the finish before installation so you are not swapping hardware after the door is prepared.
- How will the coin-release be reached from outside?: The lock includes a safety coin-release. The catalog does not give a release slot dimension or a required clearance, so check the physical hardware and your door setup before committing to a position.
What the supplied information does not confirm
The catalog does not provide a step-by-step installation sequence, drill sizes, spindle or backset dimensions, door thickness limits, or a template. That is not a reason to avoid the product, but it does mean you should not treat this article as a complete fitting manual.
For a bathroom door thumbturn lock, the practical approach is to confirm the door type and finish, then use the hardware itself and any fitting instructions that come with it to set out the position. If you need exact dimensions before ordering, ask the store rather than guessing from the catalog description.
A sensible order for the fitting job
- Confirm the door is an internal bathroom or toilet door: This matches the catalog's stated use. The lock is described as an indoor thumbturn lock.
- Choose the finish and handle pairing: Pick BRASS, STEEL or WELDERS BLACK, and decide whether you are pairing it with matching linear door handles as the catalog suggests.
- Check the coin-release access: The safety coin-release is part of the lock. Make sure the outside face of the door will allow it to be used before you finalize the position.
- Fit using the hardware and supplied instructions: The catalog does not include a fitting sequence or measurements, so rely on the product's own instructions and the physical parts rather than invented dimensions.
An honest tradeoff to consider
A thumbturn privacy lock is convenient for bathroom and toilet doors, but it is not a security lock. The catalog describes it as an indoor thumbturn lock for internal bathroom and toilet doors, with a safety coin-release. If you need a lock for an exterior door or a room with valuables, this is not the fitting described in the supplied information.
The solid metal construction and diamond-cut knurling are the tactile, design-led parts of the product. They are worth choosing if you want the Linear look, but they do not change the fact that this is a privacy fitting for internal doors.
