4721 | 4731 / 4821 | 4831
Heavy duty security mortice lock with antifriction lever latch
Product profile
For security doors
Standard version
With latch withdrawal
Backset 60 mm
Centres 72 mm for 4721, 4821 profile cylinder
Centres 74 mm for 4731, 4831 round cylinder
Forend 235x20 mm, radiussed (47..)
Forend 235x25 mm, radiussed or rectangular (48..)
Forend satin stainless steel
Clamp follower 8 mm
Antifriction lever latch
Single throw deadbolt, 24 mm
Standards
Firetested by BRE up to 4 hours
EN 1634-1: El 90
EN 12209: 3X510F7HA30
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Product data sheetApprovals & Certificates
Declaration of performance