


🔐 Lock in your safety, unlock your peace of mind.
The ERA Fortress 261-31A is a brass-effect, 2.5-inch (64mm) mortice deadlock featuring a 5-lever mechanism that meets the BS 3621 British Standard for maximum security. Designed to resist hacksaw, drill, and lock-picking attacks, it includes a 20mm throw laminated steel deadbolt and hardened steel casing plates. Ideal for external timber and composite doors, this lock requires no handle and comes with all fixings for straightforward installation. Trusted by insurance companies and police, ERA Fortress offers over 150 years of proven security expertise.
| ASIN | B003TL5SUO |
| Batteries Required? | No |
| Batteries included? | No |
| Battery description | Not Included |
| Best Sellers Rank | 35,384 in DIY & Tools ( See Top 100 in DIY & Tools ) 31 in Mortise Locks 53 in Lock Cylinders 705 in Home Security Systems |
| Colour | Brass |
| Customer Reviews | 4.4 4.4 out of 5 stars (635) |
| Date First Available | 22 Jun. 2010 |
| Finish | Laminated |
| Included Components | ERA Fortress BS 3621 2.5-inch/ 64mm 5 Lever Maximum Security Mortice Deadlock - Brass Effect |
| Item Package Quantity | 1 |
| Item Weight | 480 g |
| Item model number | 261-31A |
| Manufacturer | ERA |
| Material | Alloy Steel |
| Measurement System | CM |
| Number of Pieces | 1 |
| Part Number | 261-31 |
| Product Dimensions | 13.4 x 6.7 x 2.6 cm; 480 g |
| Shape | Rectangular |
| Size | 18.8 x 11.6 x 2.8 cm |
| Special Features | Unlock keys |
| Style | Traditional |
T**S
Spot on!
Well made and fits perfectly
A**M
Great sturdy lock at a great price :)
Great study lock at a great price, was purchased for a bedroom door always known era to be of good quality and standing I myself installed the lock and being competent with my hands being a handy man I found the install straight forward and easy with fairly minimal tools (combi drill a rattler a sharp chisel couple of spade bits and the relevant marking implements a pencil tape square etc ) the lock looks tidy and smart and comes with a few spare keys 10/10 from me does the job and looks well hope this review helps :)
S**H
Very good lock- but beware cost of spare keys
Very good lock, installed very easily. Comes with 2 keys, but we need 4, and was very surprised when the 2 extra keys cost more than the lock itself ! In our local town, or online, the cost was about the same.
A**R
deadlock for sitebox
excellent lock very happy with them,and very good value for money compared to other sites.i used the locks for site boxes perfect fit,thanks
C**S
Era dead lock
Great bit of kit exactly what I wanted
K**M
Effective strong lock
Looks good. Quality lock. Arrived in good time
S**N
Will it replace the lock you have already?
I removed my existing ERA 5 lever deadbolt lock, which was getting sticky and unreliable after 20 years service. The ERA fortress lock was the closest match to what I already had. On the photos it looked exactly the same and the reported dimensions were the same, so I hoped it would be a like for like replacement. The product was delivered promptly and was much as expected, though a little vertical play on the bolt meant that the action can feel like it might snag a little. but overall no issues with what I have bought. What was really irritating was the minor dimensional differences to the existing one. The spacing between the two main fixiig holes was 2mm different. The the body is slightly thicker (less than 1 mm difference) and the brass plate that holds it in position was 0.2mm wider ( some chisel work needed there then). The key hole is positioned about 3 mm different to the original (aaagh!). The bolt moves out by a further couple of mm. Thus what could have been a 10 minuted swapover job now becomes more than an hour and needs chisel work and movement of holes. Irritating. Why could they not say it is not a like for like swapover? Why do they have to make these small dimensional changes? Whilst I had the old lock out I dismantled it, cleaned and lubricated it, so that it now works more smoothly than before. So I put it back ini position. The new lock can sit on the shelf for a bit longer, until I really have to change it and can face the task of making it fit properly. However, if you just want a lock to fit into a new door, it is fine. For my purpose, not so fine.
O**S
Lovely lock
Easy to fit and works a treat
K**R
For an American who loves locksport, it's very nice to be able to affordably get these locks. Excellently made, good challenge. And delivered to me early (your mileage may vary).
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