Spira Brass 5 Lever BS3621 Dead Lock - 63mm - Grey
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Product Information
Full details
The Spira Brass 5 Lever BS3621 Dead Lock is designed for homeowners and contractors seeking a high-security locking solution for external doors that complies with insurance requirements. This 63mm (2.5-inch) deadlock provides robust protection through its BS3621 fire-rated engineering and CE Warrington certification, offering peace of mind and structural reliability. While it offers superior security, users should note that the installation process requires precise door mortising, which may necessitate professional woodworking tools or skills for a flush finish.
All features
| Colour | Grey |
|---|---|
| Model Part Number | 6840 |
| Brand | SPIRA BRASS |
Extended Product Information
FAQs
Is this lock suitable for UPVC doors?
No, this is designed for timber doors where a mortise can be cut into the wood.
Does this lock meet my insurance requirements?
As a BS3621 certified lock, it is widely recognized by insurance companies as an approved high-security device for external doors.
What tools are needed for installation?
You will need a drill, a selection of wood chisels, a hammer, a screwdriver, and a measuring tape.
Can I get more keys cut?
Yes, standard locksmiths can replicate these 5-lever keys if you provide the original.
What is the backset dimension?
The backset is 63mm (2.5 inches), which is a standard size for most residential timber doors.
Troubleshooting
Key is difficult to turn in the lock
Check that the door is not misaligned with the frame. If the strike plate is slightly off, the bolt may be under pressure, preventing smooth movement.
The lock mechanism feels gritty
Apply a small amount of powdered graphite lubricant into the keyway and work the key back and forth. Avoid using liquid WD-40.
Pros and Cons
Pros
- Insurance-approved BS3621 security rating
- Verified fire-rated performance
- Solid, durable construction
- Includes essential mounting hardware
Cons
- Requires precise mortising for installation
- Limited to two included keys
- Professional installation recommended for non-experts
Setup, Compatibility & Care
Installation involves cutting a precise mortise into the door edge to accommodate the lock body and a recess for the forend plate. Ensure your door thickness is sufficient to support the 4.4cm depth of the lock body. Use a sharp chisel to clean out the mortise to ensure the forend sits perfectly flush with the door edge. Regarding care, avoid using harsh chemical cleaners on the grey finish; a soft, damp cloth is sufficient to remove debris. Periodically check that the fixing screws remain tight, and if the mechanism feels stiff, use a dry graphite lubricant rather than oil-based products to prevent internal buildup.