Simplex 266-006 — B keyed lock assembly, catalogued by Johnson Controls under Simplex part ID 266-006 as B Lock Assy.Simplex standardised on a small set of lock keyings across its panels, cabinets and manual stations, and B is the common one: the key that turns it is the 252-019 B key, listed in Simplex service parts lists next to the door hardware and the same keying used on 2099 break-glass stations. What separates the B keyed parts from one another is not the key but how much of the lock you get and which door it was built for. Simplex lists 266-005 as the B cam lock for 4100U and 4100 Legacy metal cabinet doors, 266-085 as the cam lock made for the 4100ES plastic door, and 266-006 as the lock assembly. Companion hardware carries its own numbers again. Simplex PID 266-006, catalogued as B Lock Assy B keying; opened by the 252-019 B key 266-072 is the cam lock retaining clip 266-012 is the nut Simplex lists for the 266-005 cabinet door B lock Six B keyed lock parts sit within a few dollars of each other, so order by number, not by key. This is not 266-085, the B cam lock Simplex lists only for the 4100ES plastic door, and it is not 266-005, 266-018, 266-021 or 266-058.
