ock case with a cylinder function for fire doors. The lock is opened by a key or a thumbturn. The non-deadlocking latchbolt protrudes 14 mm. The lock can also be used with electromechanical striker plates. Following striker plates are recommended to be used with a microswitch locking box: 4692, 4693 Striker plate: 4690, 4691, LP711, LP714, Cylinder ABLOY® C, N, T, U Fire resistance: Wooden doors EI115 – EI160 and EI215 – EI260, Metal doors EI115 – EI1120 and EI215 – EI2120 Mortise standard: SFS 5209.