Master Lock Door Knob Lock, BC Series, Grade 3, Biscuit Knob, Keyed Entry

Yes. The BC Series BC01 entry knob ships with a six-way adjustable latch that sets to either 2-3/8 inch (60mm) or 2-3/4 inch (70mm) backset, so it drops into either of the two standard bored preps without ordering a different latch. The same latch handles square corner faceplates, radius (rounded corner) faceplates, or drive-in installation, which covers most wood and metal residential door preps you'll run into on a turnover.

You pick the keyway when you order. The BC01 is built in Kwikset KW1, Schlage C, and Weiser WR5 keyways, so if your building is already running on one of those three you can stay on the same key system rather than issuing new keys. It takes a conventional cylinder, so a locksmith can rekey it to your existing bitting on site. Note the description also cites an SC1 cylinder, so confirm the keyway option you select on the order matches the key in your hand.

Yes, and it's a required choice at order time on the BC01. Keying options are KA (keyed alike, so one key runs every lock in the group), KD (keyed different, each unit on its own key), or ordering with no cylinder if you're supplying your own or having a locksmith cylinder them. There is also an optional key code field, so if you're adding doors to an existing group you can call out the code you already have on file and stay on the same key.

The BC01 is a Grade 3, residential-rated entry knob. That's the right level for apartment unit doors, single family rentals, and light-traffic openings. For a corridor, office suite, or anything taking commercial traffic, step up: the Callan Edgewood is a Grade 2 entrance knobset, the Corbin Russwin CK4851 is an entrance/office cylindrical knob with a Global knob, and the BEST 8K Series is a Grade 1 heavy duty entrance knob lock. Buying Grade 3 into a high-cycle commercial opening is the usual reason these come back.

For a fire rated opening, look at the Falcon W Series and X Series instead. The Falcon W101 is a Grade 2 medium duty cylindrical knob lock in passage/closet latch function with a 2-3/4 inch backset and carries a fire rating. The Falcon X101 is a Grade 1 heavy duty passage knobset with an interchangeable core, fire rated, and fits doors 1-3/8 to 2-1/4 inch. Both are passage function, so a fire door that also needs to key will want a keyed heavy duty set such as the BEST 8K entrance function Grade 1.

The Cal-Royal BER00 is the nearest match. It is a Grade 3 knob lock in the entrance/office function with a Kwikset keyway, which lines up with the BC01's Grade 3 entrance function and its Kwikset KW1 keyway option. The Pamex FTF Baron, part number PMX-FTF-00, is also a Grade 3 entrance/office knob lockset and fits doors 1-3/8 to 1-3/4 inch thick.

Step up to a heavy duty knob lock. The BEST 8K Series entrance function single cylinder is a Grade 1 heavy duty knob lock in the same entrance function the BC01 serves. The Corbin Russwin CK4851 is an entrance/office cylindrical knob lock with a conventional cylinder and fits doors 1-3/8 to 2 inch. The Sargent 8XG04 is a Grade 1 heavy duty single cylinder knob lock in storeroom function with a 2-3/4 inch backset, where the outside knob stays locked at all times.

The BC01 is a keyed entry knob, so for an interior door with no key take a passage or privacy knob instead. The Pamex FTF Baron passage knobset, PMX-FTF30, is Grade 3 for doors 1-3/8 to 1-3/4 inch; the matching privacy version for a bed or bath door is PMX-FTF10. The Cal-Royal BER20 is a Grade 3 privacy knob lock with brass trim for the same door thickness range. All are non-keyed, so they will not tie into a keyed system.

Dummy and passage trim are the two that get ordered by mistake. The BEST 6K Series single dummy trim and the Cal-Royal BA40 Barrington are dummy knobs - they are surface-mounted trim with no latch, so they neither latch nor lock. The Schlage A170 is a Grade 2 single dummy trim as well. Passage sets such as the Arrow MK01 and Arrow RK01, both Grade 2, carry a latch but no cylinder and no lock at all. The BC01 is a keyed entry knob, so only a keyed entrance function will replace it on an exterior opening.

The Cal-Royal BER00 is an entrance/office Grade 3 knob lock built with a Kwikset keyway, so it keys into the same KW1 system as the BC01's Kwikset KW1 build. The Kwikset 400P Polo is a keyed entry knob, and the clear-pack 400P-CP is Grade 3 entrance for doors 1-3/8 to 1-3/4 inch. If the building is on a Schlage C system instead, the BC01 is also built in a Schlage C keyway.

Several peers cover the thicker leaf. The Corbin Russwin CK4851 entrance/office knob lock takes doors 1-3/8 to 2 inch, as does the Corbin Russwin CK4310 in passage function. The Falcon X101 goes to 2-1/4 inch. On the entry side, the Deltana 3381 Egg Knob and the Deltana 6171 Round Knob are both entry function for doors 1-3/8 to 2 inch.

Entry, which is what the BC01 is, means keyed from the outside and locking from the inside, for a door that leads outdoors or into a unit. A passage knob has no lock at all and just latches, for halls and closets. Privacy locks with a push button or turn and unlocks with an emergency tool, for bedrooms and baths. If you're doing a whole unit, you typically need one entry at the front door plus passage and privacy inside. ZenSupply carries matching Pamex Baron FTF knobsets in all three: entrance/office, privacy, and passage.

The BC01 is a keyed entry knob for exterior locking applications, and on its own it gives you a key outside and a locking button inside. Most exterior door specs pair a keyed knob with a separate single cylinder deadbolt for the real security, and the knob just handles latching and everyday locking. If you go that route, order the deadbolt in the same keyway you selected here (KW1, Schlage C, or WR5) so one key runs both, and specify keyed alike across the pair.

Staying at the same Grade 3 keyed entry level, the Cal-Royal BER00 is an entrance/office knob lock with a Kwikset keyway and a 1-3/8 to 1-3/4 inch door thickness range, and the Kwikset 400P-CP Polo is a Grade 3 keyed entry knob that comes with an adjustable round corner latch and round corner strike for the same thickness range. Callan Canova and Callan Santo are both Grade 3 entrance knobsets if you want a different knob shape. If the opening takes more abuse than a rental unit door, go to the Grade 2 Dexter C2000 entry/office knob instead.

Handing isn't a factor. Cylindrical knob locks like the BC01 are non-handed, so one part number works on a left or right hand door and the latch simply flips. What you do have to specify is finish, keyway, and keying (KA, KD, or less cylinder). The six-way adjustable latch also means you don't order a separate latch for a 2-3/8 versus 2-3/4 inch prep, or for a square versus radius faceplate.

Both are Grade 3 entrance knobsets. The Callan Canova is part of the Canova series and the Callan Santo, CLN-360601, is the same Grade 3 entrance function in a different knob style. Callan also builds the Edgewood, CLN-G2KE1001, and the Roland, CLN-G2KR1011, as Grade 2 entrance knobsets if the opening calls for a heavier grade than the BC01's Grade 3.

The Lockey 3830 is a mechanical keyless combination knob lock with auto-locking passage function, for doors 1 3/16 to 2 inch. It opens on a pushbutton code rather than a cylinder, so there are no keys to issue or rekey - a different approach from the BC01, which runs a conventional cylinder in a Kwikset KW1, Schlage C or Weiser WR5 keyway.

Yes, on the interior side. Baldwin's Estate 5000 Baltimore knob comes preconfigured as a passage set, BAL-5000PASS, and as a privacy set, BAL-5000PRIV, both with a 2-3/8 inch backset and full lip strike - the same 2-3/8 inch backset the BC01 adjusts to. Baldwin also lists the 5011 Colonial passage knob with 5058 rose and the 5077 Bethpage privacy knob with R027 rose. Emtek's porcelain knobs and Classic Brass crystal Georgetown and Providence knobs are dummy pairs, so they mount as trim only.

A common package runs a keyed entry knob at the unit door and non-keyed sets inside. The Dexter C2000 Series covers all of it in one Grade 2 family for doors 1-3/8 to 1-3/4 inch: entry/office keyed, privacy for bed and bath, and passage for hall and closet, all non-clutching ball knobs. Pamex does the same in Grade 3 with the FTF Baron entrance/office, privacy and passage sets over the same thickness range, which matches the BC01's Grade 3 rating.

No. The Sargent 28C-KNOB is exit device trim with a knob and rose in entrance function for 1-3/4 inch doors, and the Sargent 78-2875 is an outside knob only with B design - both are trim that mounts to an exit device, not standalone locks. The Imperial USA ED-BKL580 is likewise knob trim in storeroom function. A BC01 replacement needs a complete cylindrical knob lockset with its own latch.

The Corbin Russwin CK4851 is an entrance/office cylindrical lock with a Global knob and a conventional cylinder, the same conventional cylinder classification the BC01 uses, and it fits doors 1-3/8 to 2 inch. The Dexter C2000 entry/office ball knob is Grade 2, keyed and non-clutching, for 1-3/8 to 1-3/4 inch doors. Callan's Edgewood, CLN-G2KE1001, and Roland, CLN-G2KR1011, are Grade 2 entrance knobsets.

Four finishes on the BC01 biscuit knob: 605 bright brass, 609 antique brass, 716 aged bronze, and 619 satin nickel. Each is available in all three keyways, so you're not forced into a finish by the key system you run. If you're matching existing hardware across a building, 619 satin nickel and 716 aged bronze are the two that read closest to the modern and oil-rubbed looks already on most units.