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skip to Union 3R35X Non-Deadlocking Latch

Union 3R35X Non-Deadlocking Latch

£191.99

(£159.99 ex VAT)

sku: 3R35X
  • Modified for fire escape applications to ensure safe emergency egress
  • Lever handle operation from the inside allows for rapid exit without a key
  • Automatic deadlocking latchbolt engages immediately upon closing the door
  • Integrated snib function permits the latch to be held in the retracted position
  • Key-controlled access from both sides for secure and managed entry
  • Internal operating handle remains unsecured to maintain safety standards
  • High-security 5-detainer mechanism provides enhanced resistance to picking

Key Configuration

Finish

Handing

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.

The Union 3R35X is a specialised mortice nightlatch designed specifically for use on doors requiring a fire escape function. It balances high-level security with life safety requirements, ensuring that while the door remains secure against external entry, it can always be opened from the inside via a lever handle for emergency egress.

This lock is typically used in commercial premises, public buildings, and communal residential exits where controlled entry and safe exit are paramount. It features an automatic deadlocking latch, which provides immediate security every time the door is closed without the need for manual locking. For convenience during busy periods, an integrated snib allows the bolt to be held back, leaving the door ajar.

The internal mechanism uses a 5-detainer system, offering significant resistance to unauthorised manipulation. It is suitable for timber doors and is often installed as a replacement part for existing detainer locks or as a primary security component in new fire-rated door assemblies. The internal handle is designed so that it cannot be locked or secured, ensuring the fire escape route is never obstructed.

Dimensions Image: Union 3R35X Non-Deadlocking Latch
Dimensions Image: Union 3R35X Non-Deadlocking Latch

Brand

SKU

3R35X

Box Contents

2 keys

strike plate

fixing screws

instructions

mortice lock

FAQs

This latch is specifically modified for use as a fire escape lock. The inside lever handle can always withdraw the latchbolt to allow for a quick exit, and it cannot be locked or secured from the inside to ensure emergency egress is never obstructed.

Yes, the lock features a built-in snib. This allows you to hold the latchbolt back manually, keeping the door ajar when you need frequent access without using a key or handle.

Yes. The latchbolt automatically deadlocks once the door is closed, providing immediate security. From the outside, you will always need a key to gain entry, while the inside handle remains active for exit.

The Union 3R35X utilizes a robust 5-detainer mechanism for reliable operation. It features an 80mm case size and an 8mm follower, making it compatible with standard lever handles on the interior.

Related Products

skip to Extra Key for Union 3R35 Locks

Extra Key for Union 3R35 Locks

£4.80

(£4.00 ex VAT)

sku: EXCHK
  • Specifically designed for compatibility with Union 3R35 mortice deadlock mechanisms
  • Functions as a precise replacement or additional spare key
  • Manufactured to original equipment manufacturer (OEM) specifications for reliable operation
  • Suitable for high-security 5-detainer lock configurations
  • Precision-engineered to ensure smooth engagement with internal lever systems
  • Ideal for maintaining secure access in domestic and commercial premises
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 Union 3R35 Replacement Key is designed specifically for use with the Union (formerly Chubb) 3R35 series of mortice deadlocks. These locks are widely utilised in both residential and commercial settings to provide high-level security for external doors. This key serves as an essential component for property owners needing to increase the number of available keys or replace worn or lost originals.

Precision-engineered to match the exact requirements of the 3R35's 5-detainer mechanism, the key ensures smooth rotation and reliable engagement with the bolt work. By using a key designed to the original manufacturer's tolerances, the risk of internal wear on the lock mechanism is significantly reduced compared to generic alternatives.

  • Compatibility: Exclusively for Union 3R35 and legacy Chubb 3R35 mortice deadlocks.
  • Application: Suitable for timber doors where 3R35 deadlocks are installed for primary security.
  • Function: Provides a direct interface with the internal lever pack to throw or retract the deadbolt.
skip to Internal Handle for Union 3R35

Internal Handle for Union 3R35

£118.80

(£99.00 ex VAT)

sku: 3R35H
  • Specifically designed for compatibility with Union 3R35 mortice locks
  • Features an integrated snib to facilitate the latch hold-back function
  • Engineered to prevent the handle mechanism from fouling the internal lockcase
  • Incorporates a standard Euro profile cylinder cut-out for key access
  • Lever handle design provides ergonomic operation of the latch mechanism
  • Provided as a complete internal furniture set including the backplate
  • Surface-mounted design with pre-drilled holes for straightforward installation
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 Union 3R35 Internal Handle is a specialised piece of door furniture designed to work seamlessly with the 3R35 lock series. Unlike standard lever handles, this unit is engineered with specific offsets and internal clearances to ensure that the handle operation does not interfere with the lockcase mechanism.

This handle is essential for applications requiring the latch hold-back feature. It includes a dedicated integrated snib located on the backplate, which allows the user to engage the latch in a retracted position when required. This functionality is typical for internal doors where temporary free passage is needed without the latch engaging.

Suitable for use on timber doors, the backplate includes a pre-cut profile aperture to accommodate a locking cylinder. It serves as an essential component for both new installations and as a direct replacement for worn or damaged internal furniture where specific lockcase compatibility is required. The design ensures that all internal moving parts align correctly with the 3R35 series' unique internal configuration.

Brand

SKU

3R35H

Box Contents

handles

skip to Handle Set for Union 3R35 | Satin Chrome Finish

Handle Set for Union 3R35 | Satin Chrome Finish

£67.20

(£56.00 ex VAT)

sku: L16105
  • Designed specifically for use with the Union 3R35 mortice lock
  • Features an integrated snib to hold the latch in the retracted position
  • Engineered to prevent the lever mechanism from fouling the lockcase
  • Supplied as a complete set for internal and external application
  • Direct replacement for original Union 3R35 hardware
  • Maintains the full functionality of the latch and locking system
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 Union 3R35 Handle Set is a purpose-designed hardware solution specifically engineered for compatibility with the Union 3R35 mortice lock. Due to the unique configuration of the 3R35 lockcase, standard lever handles often foul the mechanism; this dedicated set features the necessary offset to ensure smooth, unobstructed operation.

This handle set includes a functional integrated snib located on the backplate. This allows the user to hold the latch bolt in the retracted position, enabling free passage when security is not required. It is an essential component for both new installations and as a direct replacement for worn hardware on existing Union 3R35 systems.

  • Compatible exclusively with Union 3R35 series locks
  • Provides clearance for internal lock components
  • Suitable for timber doors in residential or commercial settings

Brand

SKU

L16105

Box Contents

handles