4521 | 4531 / 4621 | 4631
Heavy duty mortice lock with antifriction lever latch
Product profile
Offices, government and airport buildings
Standard version
With transmission
Backset 60 mm
Centres 72 mm for 4521, 4621 profile cylinder
Centres 74 mm for 4531, 4631 round cylinder
Forend 235x20 mm, radiussed (45..)
Forend 235x25 mm, rectangular (46..)
Forend satin stainless steel
Clamp follower 8 mm
Antifriction lever latch
Single turn deadbolt, 14 mm
Standards
Firetested by BRE up to 4 hours
EN 1634-1: El 90
EN 12209: 3X510F2HA30
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Product information
Product data sheetApprovals & Certificates
Declaration of performance