McGrath A231 Slimline Digital Smart Lock - Sliding Doors (Hook Bolt)
The McGrath A231 is an ultra-slim 5-in-1 digital smart lock engineered specifically for sliding aluminium doors where space is limited. With an exceptionally narrow 31 mm lock body, the A231 is one of the slimmest smart locks in the McGrath range, making it ideal for the narrow stile sliding door frames commonly used in residential and light-commercial applications.
This sliding-door variant is supplied with a European hook bolt mortice suited to sliding door frames. The hook bolt throws into the strike and pulls the door tight for secure retention - the correct locking action for a slider, where a standard latch bolt cannot hold. It is available with a 28 mm or 35 mm backset to suit varying door profiles.
Lock configuration and user management are handled through the McGrath Locks App using Bluetooth as standard. Access can be issued via PIN codes, RFID credentials, fingerprint recognition, Bluetooth eKeys, or a mechanical key override. Optional remote access is available when the lock is paired with a compatible McGrath Locks Wi-Fi gateway.
Usually same day if ordered before 11am AEST (excluding weekends and QLD public holidays).
Sliding doors need a hook bolt mortice rather than a standard latch, because the bolt must pull the door tight into the frame. This A231 sliding variant is supplied with exactly that. If you are not sure which door type you have, our Buyer's Guide covers the differences - see Chapter 04 - Smart Lock Door Types.
Available Finish Options
Matt Black
(This Product)
STK MLA231 w HOOK BOLT
Silver
(This Product)
STK MLA231 w HOOK BOLT
Both finishes are supplied under the single A231 sliding-door listing. Finish selection does not affect functionality, compliance, or performance.
Key Features
- 5-in-1 access: Keypad PIN, RFID card or tag, fingerprint recognition, Bluetooth eKey, and mechanical key override - five independent access methods.
- Ultra-slim 31 mm body: One of the slimmest smart locks in the McGrath range, designed to fit the narrow stiles of aluminium sliding doors.
- Hook bolt mortice for sliders: Supplied with a European hook bolt mortice that pulls the door tight into the frame - the correct locking action for a sliding door.
- 28 mm or 35 mm backset: Available in two backsets to suit varying sliding door profiles.
- Bluetooth app management: Configure the lock and manage users through the McGrath Locks App over Bluetooth, with no internet connection required for local control.
- Optional Wi-Fi remote access: Add a compatible McGrath Locks gateway for remote unlocking, credential management, and access history from anywhere.
- Passage mode: Hold the door unlocked for free access during business hours or events.
- Anti-peep PIN entry and lockout: Randomised digit entry and automatic lockout after repeated incorrect PIN attempts.
- Audit trail: Access history is available within the mobile app.
- IP65-rated external housing: The exterior lock housing is rated IP65 for sheltered installations. The internal unit is not IP rated.
Access Methods
For a full explanation of how each access method works and when to use it, see Chapter 03 - Smart Lock Access Methods in our Buyer's Guide.
What's in the Box
- Exterior lock assembly
- Interior lock assembly
- European hook bolt mortice lock (28 mm backset)
- Strike plate
- Installation guide
- Drill positioning template
- 2 x mechanical keys
- 2 x RFID access tags
- Mounting screws and fixings
- Mini security screwdriver
Suitable Uses
- Aluminium sliding doors: The 31 mm body and hook bolt mortice are purpose-built for narrow stile aluminium sliders on homes and light-commercial premises.
- Timber sliding doors: Also suits white-painted timber sliding door frames on character and heritage homes.
- Alfresco and patio entries: Ideal for the glass sliding doors that open living areas to pools, courtyards, and marina frontage - install in a sheltered position (IP65 external housing only).
- Commercial glazed entries: Suits frameless and framed aluminium sliding glass doors on offices and retail premises, with flexible credential management for staff.
- Short-stay and rental properties: Bluetooth eKeys and (with a gateway) remote code management support Airbnb and holiday-let sliding-door entries.
Battery, Power and Backup Access
- Powered by 4 x AAA alkaline batteries (not included). Terry's Locksmiths strongly recommends Duracell batteries.
- Typical battery life up to 12 months based on approximately 10 uses per day.
- Low battery alerts are provided audibly at the lock and within the app.
- USB-C emergency power input allows temporary operation using a power bank if batteries run flat.
- Mechanical key override via the Euro cylinder ensures access in all power conditions.
Wi-Fi Remote Access (Optional)
This smart lock does not include native Wi-Fi connectivity. Remote access and management are available only when the lock is paired with a compatible McGrath Locks gateway. With a gateway installed, you can remotely unlock the door, issue or revoke access credentials, and view access activity through the McGrath Locks App from anywhere with an internet connection. For a detailed explanation of gateway types, capabilities, and selection guidance, see our guide to the differences between the McGrath G2, G3, G4 and G5 gateways.
Specifications
IP rating note: The IP65 rating applies to the external lock housing only. The internal unit is not IP rated and must not be exposed to water or moisture. Install in a sheltered position.
Dimensions
Lever Handle Dimensions
Knob / Hex Handle Dimensions
All dimensions shown are in millimetres. Body height 316 mm, width 31 mm; spindle-to-cylinder centres 85 mm. Lever and hex knob handle options are shown.
McGrath Locks - Slimline Model Comparison
Mortice Lock Options
Illustrated mortice options shown are from the McGrath Euro 85 Series. This sliding variant is supplied with a Euro hook bolt mortice; availability and supplied configuration depend on the selected backset and door application. See the Accessories and Spares section for the individual mortice, cylinder, and key options.
Accessories and Spares
The following McGrath items suit the A231 platform. Mortice bodies, override cylinders, and key blanks are confirmed compatible with the A231 series.
App Platform and Data Hosting
McGrath smart locks are backed by long-established industry partners and supported locally. To learn more, read Why Terry's Locksmiths, LSC and McGrath Locks Give Long-Term Confidence.
Frequently Asked Questions
Both share the same ultra-slim 31 mm A231 body and the same 5-in-1 access. The difference is the mortice: this sliding variant is supplied with a European hook bolt mortice that pulls the door tight into the frame, which is the correct action for a slider. The hinged A231 uses a standard latching mortice. Order the version that matches your door.
The backset is the distance from the edge of the door to the centre of the cylinder. Narrow aluminium sliding stiles usually take the 28 mm backset; wider profiles may take 35 mm. Measure your existing hardware or door prep before ordering - see how to measure your lock backset. The mortice cross-section is illustrated in the Dimensions tab and the Mortice Lock Options image.
Not out of the box - the A231 runs on Bluetooth for local control. To unlock, manage credentials, or view access history remotely, add a compatible McGrath Locks Wi-Fi gateway. For guidance on choosing one, see the G2 vs G3 vs G4 vs G5 gateway comparison.
The external housing is rated IP65, which handles rain splash and humidity in a sheltered position - under an eave, patio, or alfresco roof. The internal unit is not IP rated, so avoid fully exposed installations without overhead protection. For more on IP ratings, see Chapter 11 - Australian Smart Lock Standards.
Yes. The McGrath Locks App supports the TTRenting and TTHotel platforms for time-limited PIN codes and eKeys. Issuing or revoking codes remotely (without visiting the property) requires a McGrath gateway to keep the lock connected; on-site codes can be set over Bluetooth without one. See our guide to using TTLock for Airbnb in Australia and Chapter 07 - Airbnb and Short-Stay Rentals.
Additional Information
Sliding door version - order the right variant: This is the sliding-door A231 with a hook bolt mortice. It is not interchangeable with the hinged A231. If your door swings on hinges, order the hinged A231 instead. Confirm your door type before ordering.
Narrow stile fit: At 31 mm wide, the A231 is one of the slimmest smart locks available and fits most narrow aluminium sliding stiles. Very narrow or unusual profiles should still be checked against the Dimensions drawings before ordering - see Chapter 02 - Measuring Your Door.
Installation: The lock ships with a drill positioning template, installation guide, and strike plate. Terry's recommends professional installation for correct alignment of the hook bolt and strike on a sliding door, where alignment tolerances are tighter than on a hinged door. Incorrect strike alignment is a common cause of locking faults - see 3 common DIY installation mistakes and easy fixes.
Brand and support: McGrath Locks are distributed in Australia through Terry's Locksmiths and supported by LSC (Locksmith Supply Company). For context on the distribution chain and long-term parts availability, see our overview of smart lock brands in Australia.
12-month warranty against defects in materials and workmanship (24-month on ALBION, ASCOT, WINDSOR, ULTRA SECUA, HAMILTON, BARDON and STAFFORD models). McGrath Locks will repair, replace, or refund at their discretion. Proof of purchase required for all claims. Returns and Warranty | McGrath Locks Warranty
What's in the Box - McGrath A231 (Sliding)
- Exterior lock assembly
- Interior lock assembly
- European hook bolt mortice lock (28 mm backset)
- Strike plate
- Installation guide
- Drill positioning template
- 2 x mechanical keys
- 2 x RFID access tags
- Mounting screws and fixings
- Mini security screwdriver
McGrath A231 Sliding Door - Real Installations
McGrath A231 - Dimensions
All dimensions shown are in millimetres. Body height 316 mm, width 31 mm; spindle-to-cylinder centres 85 mm.
McGrath A231 - Product Brochure
McGrath Locks Warranty
Warranty Summary
How to Make a Claim
- Contact Terry's Tradies Pty Ltd and its associated websites, trading names, and subsidiaries (the place of purchase) within the applicable warranty period.
- Supply your proof of original purchase — a receipt or tax invoice is required.
- Provide a clear description of the fault and your contact details.
- You may be asked to return the product for assessment before a remedy is determined.
- McGrath Locks will, at their discretion, repair the product, replace it with the same or an equivalent model, or provide a refund of the purchase price.
Exclusions
This warranty does not cover:
- Normal wear and tear
- Products that have been disassembled
- Damage caused by improper handling, incorrect installation, misuse, abuse, neglect, modification, or accident
- Installation by unlicensed persons (including non-licensed locksmiths or technicians)
- Products not used in accordance with the supplied instructions
- Cosmetic damage that does not affect functionality
- Labour or installation costs related to the removal or reinstallation of products
- Exposure to conditions outside normal environmental use
- Work completed before warranty approval
- Damage caused by battery leakage, battery failure, or force majeure
Important Notes
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if they fail to be of acceptable quality and the failure does not amount to a major failure. This warranty is provided in addition to your rights and remedies under the Australian Consumer Law.
Further Information
It can be overwhelming with all the choices out there. We can help! We are experts with decades of experience in fitting locks of all types, not just Smart Locks. It is a free service we offer, and with just some photos and a few minutes of your time you can get expert advice and product recommendations tailored precisely to suit your needs.
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