Tubular Lock Order Guide: 3 Functions, 7 Knob Finishes
Order a tubular lock by function first: ET for entrance, BK for privacy, PS for passage. Then pick the finish, such as 607 SSET or 592 PBPS. Every tubular knob we list fits doors 35mm to 45mm thick, with a latch that adjusts to a 60mm or 70mm backset.
The set to order
| Part | What to check | Models |
|---|---|---|
| Entrance tubular lock | 1 per door. Key outside, turn button inside. Doors 35mm to 45mm. | 607 SSET, 592 SSET, 598 SNET, 595 ACET |
| Privacy tubular lock | 1 per door. Turn button inside, no key. BK means bathroom, not black. | 607 SSBK, 598 SNBK, 595 ACBK |
| Passage tubular lock | 1 per door. No key and no button. Polished brass. | 592 PBPS |
| Tubular lever lock | 1 per door, where a lever is wanted. Entrance, privacy and passage in satin nickel, 60mm backset. | LH853 SNET, LH853 SNBK, LH853 SNPS |
| Deadbolt | 1 per exterior door, above the lock on the same edge. 25mm throw, doors 35mm to 45mm, backset 60mm or 70mm. Single cylinder, thumbturn inside. | D101 SS |
| Flush bolts | 2 per inactive leaf on a pair, top and bottom. Doors 30mm to 45mm. | FB001 |
Check it is a tubular lock before you order
A tubular lock is two knob halves held together by through-bolts, with a separate tube-shaped latch between them. Nothing else sits in the bore. Our photographs of 575, 592, 595, 598, 607 and 609 all show this construction.
A cylindrical knob lock is different: a solid chassis fills the bore and the latch hooks onto it. Both are called knob locks, and supplier sheets often mix the names up. We list the tubular models for residential use. For offices and schools, go to the cylindrical models in the knob lock order guide.
Three functions, read from the last two letters
BK means bathroom, not black. 595 ACBK is an antique copper privacy lock.
None of the three needs a key from inside. If the door is on an escape route, check the rule first: the International Building Code and NFPA 101 limit how many actions it may take to open an exit door. Confirm the function with your local authority.
| Code | Function | Outside | Inside | Typical door |
|---|---|---|---|---|
| ET | Entrance | Key in the knob | Turn button | Front door, office |
| BK | Privacy | No key | Turn button | Bathroom, bedroom |
| PS | Passage | Knob turns, no key | Knob turns, no button | Corridor, closet, kitchen |
Which model comes in which finish
- Not listed means we show no photographed model in that combination. Send it and we confirm it against your drawing.
- One finish across a job: choose the row first, because a row with gaps may force a second finish on bathrooms or closets.
- Same three functions in a lever: LH853 SNET, LH853 SNBK and LH853 SNPS in satin nickel, 60mm backset.
- In black nickel: LH852 BNET, LH852 BNBK and LH852 BNPS, 60mm or 70mm backset. Both lever series suit doors 35mm to 45mm.
| Finish | Entrance (ET) | Privacy (BK) | Passage (PS) |
|---|---|---|---|
| Satin stainless steel | 592 SSET, 607 SSET, 609 SSET | 607 SSBK | Not listed |
| Polished stainless steel | 607 SPET | Not listed | Not listed |
| Polished brass | 592 PBET, 607 PBET | 592 PBBK, 607 PBBK | 592 PBPS |
| Satin brass | 592 BSET | Not listed | Not listed |
| Antique brass | 575 ABET | Not listed | Not listed |
| Antique copper | 595 ACET | 595 ACBK | Not listed |
| Satin nickel | 598 SNET | 598 SNBK | Not listed |
The numbers to check against the door
- Door thickness: adjustable from 35mm (1-3/8 in) to 45mm (1-3/4 in).
- Backset: 60mm or 70mm (2-3/8 in or 2-3/4 in), set on the adjustable latch.
- Latch throw: 12mm (1/2 in), deadlocking on keyed functions.
- Strike: 57mm curved lip as standard, 70mm on request.
- Drive-in latch: a 1 in round 4-way latch is an option on 592, 595, 598, 607 and 609.
- Handing: fully reversible, so one lockset serves left and right hand doors.
- Bore: 54mm (2-1/8 in) cross bore and 25mm (1 in) edge bore is the common North American door prep. It is not stated per model, so send your door prep and have it confirmed against your drawing.
| Series | Knob diameter as drawn | Rose diameter as drawn |
|---|---|---|
| 592 | 50mm | 65mm |
| 595 | 51mm | 65mm |
| 598 | 52mm | 65mm |
| 607 | 53mm | 65mm |
| 609 | 55mm | 65mm |
Quantities per door
One lockset per door. Our 607 SSBK photograph shows both knob halves, the latch, the strike, a plastic strike box and fixing screws. On a pair, the inactive leaf must be bolted top and bottom so the latch has something firm to engage. Manual flush bolts are often not accepted on a pair used as an exit, so check that with your local authority.
| Door | Tubular lock | Other lines |
|---|---|---|
| Front door of a house | 1 entrance (ET) | 1 deadbolt D101 SS above the lock |
| Bathroom or bedroom | 1 privacy (BK) | None |
| Corridor or closet | 1 passage (PS) | None |
| Pair of doors | 1 on the active leaf only | 2 flush bolts on the inactive leaf, top and bottom |
What goes wrong on site
- A 50mm door: the tubular listing stops at 45mm. Order a cylindrical 587 instead, which is listed to 50mm.
- Latch left at the wrong backset: set it to 60mm or 70mm before fitting, or the knob and latch will not line up.
- BK read as black: a bathroom lock arrives on a door that needed a key.
- Latch fitted backward: the slanted face must meet the strike as the door closes.
- Strike set too far off: on keyed functions the small deadlocking pin must rest on the strike plate. If it drops into the hole, the latch can be slipped.
- Through-bolts overtightened: the latch binds. Tighten until the roses sit flat, then test before closing the door.
- 592 packing screws: the long screws preinstalled in the knob come out before installation, as our 592 SSET drawing notes.
What to send
- A door schedule: how many doors of each function.
- Door thickness and door material.
- Backset: 60mm or 70mm.
- Model code with finish, for example 607 SSET.
- Latch: faceplate or 1 in round drive-in.
- Strike: 57mm or 70mm.
- Keying: keyed to differ, keyed alike or master keyed, with the list of doors that share a key.
- Your door drawing, if the bore is already cut.
Questions buyers ask
What is a tubular passage latch lock?
It is a tubular lockset with no key and no button: both knobs turn at all times and the door only latches. 592 PBPS is our passage knob in polished brass. LH853 SNPS and LH852 BNPS are the lever versions.
Is a tubular lock the same as a cylindrical lock?
No. A tubular lock has a separate latch and nothing else in the bore. A cylindrical lock has a chassis that fills the bore. They look alike once fitted, so check the photograph of the open lock, not the name on a sheet.
Can the keys match across several doors?
575 ABET, 592 SSET, 607 SSET and 607 SPET list keyed alike and master keyed. State it on the order with the door list, and for other models ask us to confirm it before production.
Do I need different locks for left and right hand doors?
No. The tubular models are listed as fully reversible, so one lockset serves both. Count doors by function, not by hand.
Is this the lock with the round key used on vending machines?
No. That round-key cylinder shares the word tubular but is a different product, and we do not list it. Here, tubular describes the door knob set and its tube-shaped latch.
Sources
Codes change and vary by place. Confirm with the authority for your project.