Astra mini-bolt flat spring (S-024A).
To suit 60 mm backset brass body mortice locks with deadlatching bolt.
- 333 deadlatching free bolt combination locks
- 431 deadlatching vestibule locks
- 433 deadlatching key-snibbing vestibule locks
- 435 storeroom vestibule lock
- 437 vestibule combination locking deadlatch
- 439 kick off vestibule deadlatch
- 735 exit door deadlatch
- 831 deadlatching escape lock
- 931 deadlatching hotel-motel lock