Sliding Door Hook Lock Sizes: Plate Widths, Heights and Door Thickness

Updated 2026-11-05 · RAYEN 雷茵

Why does a sliding door need a hook lock?

A swing door closes against a latch. A sliding door moves along the wall, so a sprung latch has nothing to press against. A hook bolt swings out of the lock body and catches the keep on the frame. The photographs of YMET-301 show that body: a black case behind the face plate, with the hook at the front edge and a key cylinder through the middle.

The handles sit flush in the door for the same reason. A door that slides into a wall pocket or along a wall cannot carry anything that sticks out.

What sizes are available?

We list 5 models in this family. The YM models with a lock are listed as sliding door locks, and the YMKH models are pulls with no lock.

Read the first figure as the plate width and the second as its height. The drawings show a pair: one plate for each face of the door.

Lock or pull: which one do you need?

• Key on one side, thumbturn on the other: YMET-301 has square plates and YMET-401 has round-ended plates. Both are 42 × 160mm. The keyed side goes on the outside.
• Slim locking pull: YMBK-805 is the narrowest at 36 × 165mm. It has no key on the face. A small sliding control marked LOCK sits inside the finger recess. Use it where you want privacy rather than a key.
• Pull only: YMKH-702 has round ends at 45 × 150mm. YMKH-802 is square-ended at 45 × 180mm. Either one suits a wardrobe or a passage door that needs no locking.

The listing for YMET-401 and both pulls names passage doors, window doors, wardrobes and sliding doors.

Will it fit my door thickness?

The table shows which models are listed at 38-50mm. For YMET-301 and YMBK-805, confirm the range with us before you cut. Do not assume it matches the others just because the plates look alike.

A plate covers a pocket routed into the door. Thin doors are where this goes wrong. A recess cut from each face plus the lock case can leave too little timber in the middle, or break through. Check this on the drawing before cutting a batch of doors.

How do I choose the plate width?

Look at the stile, the solid timber or frame member the lock goes into. On a framed glass door or a narrow aluminium frame, the stile limits you. A 36mm plate fits where a 45mm plate does not. On a solid door there is usually more room, and you can choose by look and by how much finger space you want.

A worked example: a timber pocket door for a bathroom. You need privacy, no key, and a slim look. YMBK-805 is the first one to look at, at 36 × 165mm in Matt Black, Brushed Black Nickel or Brushed Nickel. Confirm the door thickness range with us first. If the same project has a wardrobe door nearby, YMKH-802 gives the same square-ended line at 45 × 180mm for a 38-50mm door.

What should you measure?

• The door thickness, as finished.
• The stile width, or the distance from the door's leading edge to where the panel or glass starts.
• The gap the door runs in if it slides into a pocket.
• The position of the keep on the frame, when the door is fully closed.
• Which face is outside, for the keyed models.

What to write on the order

State whether you want a lock or a pull, the model, the door thickness and the finish. For example: Sliding Door Lock, YMET-401, zinc alloy, Antique Yellow Brass, for your door thickness within 38-50mm. Each lock and pull lists its own finishes, so check that yours is on the list for that model. Quantities, price and delivery are confirmed per order. See the sliding door locks, or send us your door section and we will check the fit.