Chubb 5 Lever Mortice Sashlock with 57mm Pitch 40mm Backset and Roller Latch - Polished Brass
This Chubb 5 lever mortice sashlock is a heavy duty lock combining a deadbolt and roller latch within a single lock case. Commonly referenced as the Chubb or Union 3K74E series, it is designed for applications where key locking and latch operation are required from both sides of the door.
Important: This is the E series Chubb lock and requires different levers and key curtains compared to other Chubb mortice lock series.
Key Features
- 5 lever mortice sashlock with combined deadbolt and roller latch.
- Key and handle operated from both sides of the door.
- 14 mm deadbolt with hardened steel rollers.
- Supplied with hardened steel plate covering the bolt work.
- Finished in polished brass.
Specifications
- Lock Type: Mortice sashlock with roller latch
- Model Reference: Chubb or Union 3K74E series
- Number of Levers: 5
- Backset: 40 mm
- Pitch: 57 mm
- Handle Follower: 8 mm square
- Key Profile: CHC
- Accepts Bit Key: Yes
- Finish: Polished Brass
- Keys Supplied: 2
Dimensions
| Case Depth | 67 mm |
| Backset | 40 mm |
| Pitch | 57 mm |
Suitable Uses
- Timber doors requiring a combined latch and deadbolt function.
- Residential and light commercial applications.
- Doors where key locking and handle operation are required from both sides.
Frequently Asked Questions
- Is this the standard Chubb mortice sashlock?
No. This is the E series Chubb lock, which uses different levers and key curtains to other Chubb mortice locks. - Does this lock include handles or furniture?
No. This product is the lock case only. Compatible levers and escutcheons are required separately. - Is this suitable for external doors?
Suitability depends on the door construction and overall door hardware specification. External use should be assessed by the installer.
Additional Information
- This lock is often specified where a roller latch is preferred over a traditional spring latch.
- Installers should confirm compatibility of handles and key curtains due to the E series configuration.
- Accurate mortice preparation is important to ensure smooth roller latch operation.
