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skip to Yale 85 Deadlocking Night Latch (40mm)

Yale 85 Deadlocking Night Latch (40mm)

£28.80

(£24.00 ex VAT)

sku: YALE85
  • Compact body design specifically for doors with narrow frames or thin panels.
  • Deadlocking function allows the internal handle to be secured from the outside.
  • Integrated snib button can hold the bolt in the retracted or deadlocked position.
  • Suitable for use on inward opening timber doors as a primary locking point.
  • Functions as a reliable secondary security measure when paired with mortice deadlocks.
  • Provides key-access from the exterior and handle-operation from the interior.
Document Icon product info Document Icon product info

Finish

Key Configuration

Keys Supplied: per lock ( total) total (unless ordering multiple groups)
Additional Keys are available below
Qty:

Shipping From:

When ordering multiple Keyed Alike locks, only 1 set of keys are provided as all additional locks are made to work from that key.

If ordering 4 or more keyed alike locks you can have them set up as different groups. If Required: Let us know the details in the "Specific Key Requirements" field above.

Each group of locks will then receive keys.

5/10 Security Rating
tick Key Profile: Standard

The Yale 85 Deadlocking Night Latch is a compact rim lock solution engineered for installation on timber doors where mounting space is restricted. Its reduced body depth makes it an ideal choice for narrow door stiles or thinner panels that cannot accommodate a standard-sized latch.

This unit provides enhanced security through its deadlocking mechanism. When the door is closed, a reverse turn of the key from the exterior deadlocks the internal handle, preventing it from being operated. This is a vital feature for doors with glass panels, as it stops intruders from reaching through and opening the door from the inside. Additionally, the integrated snib button allows users to hold the bolt in the retracted position for convenience or to deadlock the latch from the inside.

Typically used on residential entrance doors, this night latch is designed for inward opening configurations. While it provides effective daily security, it is best used in conjunction with a British Standard BS3621 mortice deadlock on external doors to ensure compliance with standard insurance requirements and to provide a high level of physical protection.

Part Size (mm)
Backset 40
Bolt Length 10
Case Width 70
Case Height 41
Case Depth 62

Brand

SKU

YALE85

Box Contents

2 keys

strike plate

instructions

rim cylinder

nightlatch

rosette

Key Profile

Key Profile: Standard

FAQs

No unfortunately not, the BS3621 nightlatches can not be reversed. The only way to do this is to install a standard nightlatch from our outward opening nightlatch section and then also install a BS3621 deadlock. This deadlock will give you the insurance rating required.

You need to make sure the lock you fit is NON deadlocking. This means that you can not lock people into the property. There are a few nightlatches designed for these doors. The best is the Yale PBS3 or PBS4 or a more standard model would be the Yale 88 or 84.

The best locks for these would be the a rollerbolt style lock with a masterkeyed cylinder. I would not recommend installing a standard Nightlatch on these doors as the tenants can lock themselves out if they close the door behind them. We can supply these locks for you on a masterkey if you require or keyed differ if you would prefer.

The backset on these locks is the distance from the edge of the door to the center of the Rim Cylinder. This is the large 32mm hole drilled through the door. There are 2 main sizes of these, 60mm or 40mm. Easiest way to find out what you have is to measure from outside of the door from the edge to the center of the keyhole. If you have a solid door you should use the 60mm backset locks, if you have a glass panelled door then you may need to use the 40mm backset. If your current lock is 50mm backset you will need to see our Union locks as only Union made a 50mm backset lock in the past.

There are different levels of security you can have with all locks. The standard locks (i.e. Yale 77, Yale 88) , then the mid level locks which can be key deadlocked from outside ( Yale 89, Union nightlatches). The double locking versions are only suitable for homes with other means of exit as you can lock people inside the house if not careful.

All the extra keys for the locks are cut to the specific locks that have been ordered.

With most locks that are altered to make them keyed alike you will only get 1 x set of keys with them. So if the locks normally come with 2 you will only get 2 keys total and if they come with 3 keys you will only get 3 x keys total when ordered keyed alike.

The 40mm backset version is specifically designed for doors where space is limited, such as narrow stiles or thinner door panels. The compact body and shorter bolt require less depth to fix securely into the door frame compared to standard sized night latches.

This lock offers enhanced security through two deadlocking methods. You can use the internal slide button to lock the bolt in place, or you can perform a reverse turn of the key from the outside cylinder after closing the door to deadlock the internal handle, preventing unauthorized exit or entry.

This standard Yale 85 model is designed for inward opening doors. If your door opens outwards, you will require a specific reversed version of this lock to ensure the bolt and strike plate function correctly.

While the Yale 85 provides effective deadlocking, for external doors it is best practice to use it in conjunction with a British Standard BS3621 Mortice Deadlock. This combination ensures maximum security and typically satisfies home insurance requirements for external entrances.

Related Products

skip to Extra Key for Yale Rim Locks

Extra Key for Yale Rim Locks

£4.20

(£3.50 ex VAT)

sku: EXK
  • Precision-cut to match specific Yale rim cylinder profiles
  • Compatible with standard Yale nightlatches and rim locks
  • Ideal for providing additional access to residents or staff
  • Ensures smooth mechanical operation within the cylinder barrel
  • Suitable for both domestic and light commercial applications
  • Provides a direct replacement for lost or damaged original keys
Qty:

Shipping From:

When ordering multiple Keyed Alike locks, only 1 set of keys are provided as all additional locks are made to work from that key.

If ordering 4 or more keyed alike locks you can have them set up as different groups. If Required: Let us know the details in the "Specific Key Requirements" field above.

Each group of locks will then receive keys.

The Yale Rim Lock Extra Key is a precision-machined mechanical key designed specifically for use with standard Yale rim cylinders. These cylinders are the primary locking component found in traditional nightlatches used on timber entrance doors. Cutting extra keys to the correct profile is essential for property management, shared occupancy, or simply ensuring a spare is available in case of an emergency.

Each key is manufactured to match the specific internal pin configuration of the cylinder it is intended for. This ensures reliable engagement of the locking bolt and reduces friction during rotation, which helps to extend the lifespan of the lock's internal mechanism. These keys are intended for use as duplicates or replacements when the original set is insufficient or has been lost.

  • Application: Primarily used for front door nightlatches and secondary rim locking systems.
  • Compatibility: Designed for use with all standard Yale-branded rim cylinders.
  • Function: Operates the cylinder from the external side of the door to retract the latch or engage the deadbolt.

When providing additional keys for a security system, using precision-cut blanks is vital to maintain the security integrity of the door. These keys provide a functional and cost-effective alternative to replacing the entire cylinder unit when additional access points are required for a property.

Brand

SKU

EXK

Box Contents

1 key

skip to Suitable Size Chisels to fit Nightlatch Locks

Suitable Size Chisels to fit Nightlatch Locks

£9.00

(£7.50 ex VAT)

sku: NightChis
  • Bevelled edge design allows for precision cutting in tight corners and rebates
  • Hardened and tempered steel blades for long-lasting edge retention
  • Impact-resistant handles designed to withstand regular use with wooden mallets
  • Specifically curated for the installation of nightlatch locks and keeps
  • Precision ground blades ensure smooth and accurate wood removal
  • Ergonomic grip design for comfort and control during prolonged use
Qty:

Shipping From:

When ordering multiple Keyed Alike locks, only 1 set of keys are provided as all additional locks are made to work from that key.

If ordering 4 or more keyed alike locks you can have them set up as different groups. If Required: Let us know the details in the "Specific Key Requirements" field above.

Each group of locks will then receive keys.

The Faithfull Bevel Edge Wood Chisel Set is an essential collection of tools specifically selected for the installation of nightlatch locks on timber doors. These chisels are engineered to provide the accuracy required for creating clean recesses and rebates, ensuring a professional and secure fit for door hardware.

Each chisel features a high-quality steel blade that has been hardened and tempered to maintain a sharp edge through repeated use. The bevelled edges make these tools particularly effective for working into internal corners and tight spaces, which is critical when fitting lock keeps and housings. The impact-resistant handles are designed for durability, allowing them to be used safely with a mallet for deeper cuts.

Applications and Use:

  • Fitting and recessing nightlatch locks on wooden doors
  • Preparing door frames for lock keeps and striking plates
  • General joinery and woodworking tasks requiring precision rebates
  • Suitable for both initial installations and replacement hardware projects

Whether you are a professional tradesperson or a DIY enthusiast, this set provides the necessary tools to achieve a flush finish when mounting security hardware to timber surfaces.

Brand

SKU

NightChis

Box Contents

1 x Faithful 25mm Chisel

skip to Suitable Size Drill Bits to fit Nightlatches

Suitable Size Drill Bits to fit Nightlatches

£8.39

(£6.99 ex VAT)

sku: NightDrill
  • Designed for boring timber doors during nightlatch installation
  • Includes a flat spade bit for cylinder aperture creation
  • Secondary twist drill bit provided for pilot holes and fixings
  • 1/4 inch hex shank ensures compatibility with quick-change chucks
  • Precision-ground cutting spurs for reduced splintering on breakthrough
  • Hardened steel construction for use with softwoods and hardwoods
Qty:

Shipping From:

When ordering multiple Keyed Alike locks, only 1 set of keys are provided as all additional locks are made to work from that key.

If ordering 4 or more keyed alike locks you can have them set up as different groups. If Required: Let us know the details in the "Specific Key Requirements" field above.

Each group of locks will then receive keys.

This Black & Decker Drill Bit Set is specifically curated for the installation of nightlatches on wooden doors. It provides the essential boring tools required to prepare a door for standard cylinder rim locks, ensuring a clean and accurate fit.

The kit comprises a flat spade bit and a smaller twist drill bit. The spade bit is used to create the large diameter hole necessary for the lock cylinder to pass through the door leaf. Its central point allows for precise alignment with marked measurements, while the outer spurs cut the wood fibres cleanly to prevent breakout on the reverse side of the door.

The accompanying twist drill is used for drilling pilot holes for the mounting screws and the internal cylinder tailpiece. This prevents the timber from splitting during the final assembly of the lock hardware. Both components are manufactured from hardened steel to maintain sharpness across multiple installations in various timber densities.

  • Compatible with standard power drills and impact drivers
  • Suitable for new door installations and replacement upgrades
  • Ideal for use with most standard UK rim cylinder nightlatches

Brand

SKU

NightDrill

Box Contents

1 x Black and Decker 32mm Flat wood bit (for main cylinder hole)

2 x Black and Decker 2.5mm drill (for pilot holes)