KAS Tubular Latch - 70mm Backset, Fire Rated, with Deadlocking Security Pin

KAS Tubular Latch - 70mm Backset, Fire Rated, with Deadlocking Security Pin

The KAS NTL070 Tubular Latch is a 70mm backset tubular latch designed for use with KAS NEO, ACR, and PLATINUM smart lock systems in commercial and high-security door applications. It is fire rated to Australian Standards and incorporates a deadlocking security pin that prevents the latch bolt from being slipped or carded when the door is closed. The 70mm backset is commonly specified where the door stile or hardware positions the spindle further from the door edge than the standard 60mm — see What Is a Backset? and How to Measure Your Backset before ordering if unsure. For the BG chapter covering backset selection see Measuring Your Door — Backset.

The NTL070 shares the same external dimensions and engineering as the NTL070 (70mm backset) and NTL127 (127mm backset) — the only mechanical difference between models is the backset measurement. All three latches share the same latch head shape, tube flexibility design, throw and retraction mechanics, turning angle, fire rating, and strike plate dimensions.

The latch tube incorporates a flexible neck design that releases bending stress caused by minor drilling errors during installation, reducing the risk of binding or premature wear in real-world site conditions.

Fire Rated — System-Based Compliance
Tested and rated to Australian Standards. Fire compliance is system-based and is limited by the Fire Resistance Level (FRL) of the complete doorset assembly — including the door, frame, lock, and latch together. The latch alone does not constitute a fire-rated installation. See Fire Door Core Types — E-Core, Firecore, and Pyropanel, KAS NEO Fire Door Context, and the Fire Door Types and Certification Guide before specifying for a fire door project. For the full AS1905.1 test certificate reference list, see Fire-Rated Smart Lock Certification — Test Reports.

Asbestos Risk — Fire Doors in Older Buildings
If you are installing or retrofitting a latch on a fire door in a building constructed before 1990, be aware that some fire door cores — including certain Pyropanel FRB products manufactured through to 2025 — may contain asbestos. Drilling or cutting these cores without testing creates a serious health risk. Read Asbestos in Apartment Fire Doors — Drilling Risk before commencing any fire door installation work. See also Smart Lock FAQ — Asbestos in Fire Doors.

Installing a KAS NEO lock on a fire-rated door with a tubular latch?
The required Fire Kit (FRK101) must be used for correct installation configuration on fire doors with tubular latches.

View KAS NEO Fire Kit (FRK101)

Key Features

• 70mm backset — commonly specified where the door stile or hardware positions the spindle further from the door edge than the standard 60mm
• Fire rated to Australian Standards when installed as part of a compliant doorset assembly
• Deadlocking security pin prevents the latch bolt from being retracted by carding, shimming, or external tool pressure when the door is closed — the latch bolt is mechanically deadlocked by the strike plate depressing the pin on door close
• Flexible tube neck design absorbs bending stress from minor drilling misalignment during installation, reducing binding and extending service life
• Latch head does not protrude when the handle is in the fully rotated position — smooth, flush operation
• 42-degree turning angle required for full latch retraction
• 10-12mm throw with full retraction to 0mm on handle operation
• Identical external dimensions to NTL060 and NTL127 — only the backset distance differs between models
• Compatible with KAS NEO, KAS ACR, and KAS PLATINUM smart lock systems

KAS Tubular Latch - Model Range

All three models share identical external dimensions, latch head shape, tube flexibility design, throw, retraction, turning angle, fire rating, and security pin. The backset measurement is the only mechanical difference between models.

Full Specifications

Dimensions

All dimensions shown apply equally to NTL060, NTL070, and NTL127. Only the backset measurement differs between models.

Manufacturer dimensional drawing showing latch body dimensions, faceplate, spindle hole, and backset. The backset dimension (60/70/127 mm) is the only difference between NTL060, NTL070, and NTL127 — all other dimensions are identical.

Strike Plate Dimensions

Strike plate dimensional drawing showing overall plate dimensions, latch aperture position, and side profile with fixing depth.

Mechanical Performance Diagrams

Tube Flexibility — Flexible neck design releases bending stress from minor drilling misalignment, reducing binding risk.

Throw / Retraction — 10-12mm throw. Full retraction to 0.00mm on complete handle rotation. Deadlocking security pin: 3-4mm.

Latch Head Shape — Latch head does not protrude at full handle rotation. Returns to full 10-12mm throw on handle release.

Suitable Uses

• Doors requiring a standard 60mm backset measurement — the most common backset for commercial door hardware in Australia
• Commercial and high-traffic doors requiring fire-rated latch hardware in a compliant doorset assembly
• Doors installed with KAS NEO, ACR, or PLATINUM smart lock systems
• Applications where a deadlocking security pin is required to prevent latch bolt manipulation from outside
• Sites where drilling tolerance variation may be a consideration — the tube flexibility design reduces binding risk from minor misalignment
• Fire door installations across E-Core, Firecore, and Pyropanel doorsets (confirm the specific combination with your fire door supplier)

Available Finish Options

• 
  Silver
  (This Product)
  NTL070

Finish does not affect functionality, fire rating, or compatibility.

Frequently Asked Questions

What is the difference between the NTL060, NTL070, and NTL127?
The only mechanical difference is the backset measurement — 60mm, 70mm, and 127mm respectively. All other dimensions, the latch head shape, tube flexibility design, throw, retraction, turning angle, fire rating, and security pin are identical across all three models. Select the model that matches the backset required by the door hardware. See Standard Backset Sizes if unsure which to choose.

How does the deadlocking security pin work?
When the door closes, the strike plate depresses the security pin inward. This mechanically deadlocks the main latch bolt, preventing it from being pushed back by external pressure — whether from a card, shim, screwdriver, or similar tool. The latch bolt can only be retracted by turning the door handle or by the authorised lock mechanism from outside. Without this feature, a standard bevelled latch can be slipped open in seconds. See Deadlatch Security — What It Means in Practice for broader context.

What does the tube flexibility feature do?
The latch tube includes a flexible neck section that allows a small degree of rotation, absorbing bending stress caused by minor misalignment between the door bore and the lock spindle — a common outcome of drilling tolerance variation on site. Without this flexibility, stress concentrates at the neck and can cause binding or component fatigue over time. See Misalignment — the Third Most Common Installation Mistake.

Is the fire rating applicable to all installations?
No. Fire compliance is system-based. The latch is rated to Australian Standards, but fire performance is only achieved when the complete doorset assembly — including the door, frame, lock, and all installed hardware — meets the required FRL. Confirm full compliance with your fire door supplier or certifier before installation. See Where Fire Doors Are Required in Queensland and What the FRL Rating Means.

Is 70mm the right backset for my door?
The backset is measured from the edge of the door face to the centre of the spindle hole. 70mm is specified where the door stile or hardware positions the spindle further from the door edge than the standard 60mm. If you are unsure whether you need 60mm or 70mm, measure the existing latch or confirm with your lock supplier before ordering — the backset cannot be adjusted after manufacture. See How to Measure Your Backset and Wrong Backset — Installation Mistake 2 for what happens if the wrong backset is ordered.

Additional Information

Backset Selection
70mm is commonly specified where the door stile or hardware positions the spindle further from the door edge than the standard 60mm. If the spindle is positioned at the standard distance, the NTL060 (60mm) is the more common choice. For longer spindle distances, the NTL127 (127mm) may be required. Always confirm the backset before ordering. See What Happens If You Order the Wrong Backset.

Deadlocking Pin — Strike Plate Alignment Is Critical
The deadlocking security pin only functions correctly when the strike plate fully depresses it on door close. If the strike plate is incorrectly sized, misaligned, or allows both the latch bolt and the security pin to extend simultaneously, the deadlocking function will not engage and the latch remains vulnerable to slipping. Correct strike plate installation is essential for security performance. See 3 Common Smart Lock Installation Mistakes for related installation pitfalls.

Fire Door Installation — Confirm the Full System
When installed on a fire-rated doorset, all hardware including the latch must form part of an assessed and compliant system. Substituting non-assessed components may void the fire rating of the complete doorset. Confirm suitability with your fire door supplier prior to installation. See Fire Door Core Types Guide, the AS1905.1 Test Certificate Reference List, and the Asbestos in Queensland Fire Doors guide before commencing work on fire door installations in older buildings.

Drilling Tolerance and Alignment
The flexible tube neck accommodates realistic site drilling outcomes but is not a correction for significant misalignment. As illustrated in the tube flexibility diagram above, excessive misalignment still causes high stress and should be avoided. The flexibility is a stress-relief feature designed to handle minor real-world variation, not a substitute for accurate installation. See Door Misalignment — Installation Mistake 3 and Door Prep — Cylindrical vs Mortice Format.

System Component — For Use with KAS Smart Locks
The NTL070 is a system component designed for use with KAS smart lock hardware — it is not a standalone residential latch. It should be specified and installed as part of a complete KAS access-control installation alongside the KAS NEO Cloud Lock (HOP310) or KAS Platinum Lock (HP).

KAS Warranty - 24 Months
KAS products are covered by a 24-month manufacturer's warranty against defects in materials and workmanship.

• Return-to-base repair or replacement (subject to KAS assessment)
• Technical support provided during the warranty period

KAS advises that latches should be lubricated with PTFE-based dry lubricant and checked every 6 months. Debris must be cleaned out after tubular latch installation — debris left in the latch can cause damage and void the warranty.

This warranty operates in addition to rights available under the Australian Consumer Law.

Download PDF Resources
KAS Tubular Latch Dimensions - All Models (PDF)