KAS Tubular Latch - 70mm Backset, Fire Rated (NTL070)

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 to prevent the latch bolt from being slipped or carded when the door is closed.

The NTL070 shares the same external dimensions and engineering as the NTL060 (60mm backset) and NTL127 (127mm backset) latches - the only difference between models is the backset measurement. All three latches feature the same latch head shape, tube flexibility design, throw and retraction mechanics, turning angle, 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
Tested and rated to Australian Standards. Fire compliance is system-based and is limited by the Fire Resistance Level of the complete doorset assembly.

Key Features

• 70mm backset - commonly specified where the door stile or hardware requires a greater spindle distance 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, ACR, and PLATINUM smart lock systems.

KAS Tubular Latch - Model Range

All three models share identical external dimensions, latch head shape, tube flexibility, throw/retraction, and turning angle. The backset measurement is the only mechanical difference between models. Bold row indicates this product.

Full Specifications

Dimensions

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

Manufacturer dimensional drawing showing overall latch body dimensions, faceplate width, spindle hole diameter, and body depth.

Manufacturer dimensional drawing showing backset measurement, tube length, and latch head projection dimensions.

Strike Plate Dimensions

Strike plate dimensional drawing - front view showing overall plate dimensions and latch aperture position.

Strike plate dimensional drawing - side/profile view showing depth and fixing hole positions.

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.

Turning Angle - 42 degrees of handle rotation required for full latch retraction.

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 70mm backset measurement
• Commercial and high-traffic doors requiring fire-rated latch hardware
• Doors installed with KAS NEO, ACR, or PLATINUM smart lock systems
• Applications requiring a deadlocking security pin to resist latch manipulation from the outside
• Sites where drilling tolerance may be a consideration - tube flexibility reduces binding risk

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 correct backset to match the door hardware being used.
• 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 credit 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.
• What does the tube flexibility feature do?
  The latch tube includes a flexible neck section that allows a small degree of rotation. This absorbs 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.
• 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, and all installed hardware - meets the required Fire Resistance Level. Confirm full compliance with your fire door supplier or certifier before installation.
• 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 commonly specified where the door stile or hardware positions the spindle further from the door edge than the standard 60mm. If you are unsure, measure the existing latch or confirm with your lock supplier before ordering - the backset cannot be adjusted after manufacture.

Additional Information

• Backset Selection:
  70mm is a common backset for commercial door hardware in Australia, typically specified where the door stile or hardware positions the spindle slightly further from the door edge than the standard 60mm. Always confirm the backset before ordering.
• 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 may remain vulnerable to slipping. Correct strike plate installation is essential for security performance.
• Fire Door Installation:
  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.
• 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, 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.
• System Component:
  The NTL070 is a system component designed for use with KAS smart lock hardware. It is not a standalone residential latch and should be specified and installed as part of a complete KAS access control installation.

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