Automatically deadlocking lock for narrow profile emergency exit doors. The lock can be opened either with a key (outside and inside) or by using an emergency thumbturn (sliding snib in UP position). Latchbolt can be retained inside the lock case (sliding snib in DOWN position). Sliding snib is released only when turning the key. LC301X is the microswitch version of the lock. The switch changes it’s status when the latchbolt protrudes 9 mm or more. Striker plate 4613, 4614, LP702, LP703 Cylinder ABLOY. C, N, T, U, SCAND