McGrath A231 Slimline Digital Smart Lock - 5-in-1 Access, Ultra-Slim 31mm Body, Hinged Doors
The McGrath A231 is an ultra-slim 5-in-1 digital smart lock engineered for hinged (swing) aluminium and timber doors where stile width is tight. With an exceptionally narrow 31 mm lock body, it is one of the slimmest smart locks in the McGrath range and is built for narrow-frame door stiles.
Lock configuration and user management run through the McGrath Locks App over Bluetooth as standard. Access can be issued by keypad PIN, 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.
This listing is the hinged-door A231. For sliding doors, McGrath supplies a separate A231 with hook bolt variant. The A231 sits in the slimline family beside the A210 and A236. Where stile width, backset or door thickness is in question, work through Measuring Your Door (Chapter 02) before ordering.
Usually same day if ordered before 11am AEST (excluding weekends and QLD public holidays).
If your door has a narrow frame or tight stile, explore our range of slim-profile smart locks designed for aluminium and narrow-frame doors. Related McGrath slimline models: A210 (hinged), A210 Double-Sided, A236 (36mm hinged), and the A231 with Hook Bolt (sliding doors).
Available Finish Options
Matt Black
(This Product)
STK MLA231
Silver
(This Product)
STK MLA231
Matt Black and Silver are both supplied under the one listing (SKU STK MLA231) - select your finish at checkout. 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 - see Smart Lock Access Methods (Chapter 03) for how these credential types compare.
- Ultra-slim 31 mm wide body - one of the slimmest in the McGrath range, built for narrow-stile hinged doors.
- Available with a lever handle or a knob/hex handle configuration.
- Supplied with a European mortice lock (85 mm centres) suited to hinged-door applications.
- Bluetooth management via the McGrath Locks App.
- Optional Wi-Fi remote access when paired with a compatible McGrath Locks gateway.
- Passage mode for holding the door unlocked when required.
- Anti-peep PIN entry and incorrect-attempt lockout for added security.
- Audit trail available within the mobile app.
- IP65-rated external lock housing (external face only) for sheltered installations.
Access Methods
Battery, Power & Backup Access
- Powered by 4 x AAA alkaline batteries (not included).
- 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 from a power bank if the batteries are flat.
- Mechanical key override via the Euro mortice cylinder ensures access in all power conditions - see Mechanical Key Override on Smart Locks.
- Terry's Locksmiths strongly recommends the use of Duracell batteries.
Wi-Fi Remote Access (Optional)
The A231 does not include native Wi-Fi. Remote access and management become 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 full explanation of the gateway generations and which one to choose, read G2 vs G3 vs G4 vs G5: Smart Lock Gateways Compared and work through Gateway Comparison (Chapter 08). Compatible gateways: G3 PoE / Ethernet, G4 4G SIM, and G5 dual-band Wi-Fi. If the lock drops its connection after a gateway is fitted, Why Smart Locks Drop Off Wi-Fi covers the common causes.
Full Specifications
Dimensions
All dimensions shown are in millimetres. The A231 is available in two handle configurations - a knob / hex handle and a lever handle - each shown below.
Mortice Lock Options
The A231 uses the McGrath Euro 85 Series mortice. Illustrated options below are from that series; availability and the supplied configuration depend on the selected lock variant and door application (this hinged listing ships with a 28 mm backset body).
Item Code Family - Slimline Model Comparison
Where the A231 sits within the McGrath slimline range:
Accessories & Spares
Confirmed spares, mortice options and add-ons for the A231:
Suitable Uses
- Ultra-narrow-stile aluminium hinged doors where even a 36 mm body will not fit.
- Residential, commercial and light-commercial entry doors on the McGrath 85 Series Euro mortice.
- Timber and aluminium hinged doors within the 28-55 mm thickness range.
- Doors where either a lever or a knob / hex handle is preferred.
- Retrofit upgrades on existing Euro mortice prep - confirm door type against Door Type Matching (Chapter 04).
Frequently Asked Questions
The A231 has an ultra-slim 31 mm wide body - the narrowest McGrath slimline lock - with a supplied 28 mm backset Euro mortice (85 mm centres). It suits doors 28-55 mm thick. Measure your stile width, backset and door thickness first - Measuring Your Door (Chapter 02) and Measuring Your Lock Backset walk through it.
This listing is the hinged-door A231. For sliding doors, McGrath supplies a separate A231 with hook bolt variant with 28 mm or 35 mm sliding backset options.
No. Bluetooth is standard for local app control. Remote unlocking and credential management require a compatible McGrath gateway (G3, G4 or G5). G2 vs G3 vs G4 vs G5 explains the differences.
Low-battery alerts sound at the lock and appear in the app well before the batteries die. If they do go flat, use the USB-C emergency power input with a power bank, or the supplied mechanical key in the Euro mortice cylinder. Mechanical Key Override on Smart Locks covers planning for a flat-battery lockout.
On slimline mortice locks this is almost always spindle/hub position, backset, or door prep rather than a fault. Smart Lock Not Locking? 3 Common DIY Mistakes covers it. Some buyers also ask about a vibration Tamper Alert - the A231 does not support Tamper Alert; if it appears in the app it produces phantom alerts, so leave it off (how to turn it off).
Additional Information
The A231 is a McGrath-branded lock on the TTLock platform (also compatible with TTRenting and TTHotel for short-stay and hotel management). It is distributed by LSC and supported by Terry's Locksmiths - see Why Terry's Locksmiths, LSC & McGrath Locks Give Long-Term Confidence. For a plain-English overview of the platform, see the TT Lock Platform Guide (Chapter 14) and Which App Platform Is Right for You.
Within the slimline family, the A231 is the 31 mm ultra-slim member. Step up to the A236 (36 mm) or A210 (~43 mm) for a larger body, choose the A210 Double-Sided for back-to-back keypad access, or the A231 with hook bolt for sliding doors.
Warranty
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 & Warranty | McGrath Locks Warranty
PDF Downloads
App Platform & Data Hosting
McGrath smart locks are backed by long-established industry partners and supported locally. To learn more, read Why Terry's Locksmiths, LSC & McGrath Locks Give Long-Term Confidence.
What's in the Box - McGrath A231
- Exterior lock assembly (keypad, RFID and fingerprint reader)
- Interior lock assembly
- European mortice lock (28 mm backset, 85 mm centres)
- Strike plate
- 2 x mechanical keys
- 2 x RFID access tags
- Mounting screws and fixings
- Drill positioning template
- Installation guide
- Mini security screwdriver
McGrath A231 - Real Installations by Terry's Locksmiths
McGrath A231 - Dimensions
McGrath A231 - Product Brochure
PDF Files - McGrath A231
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
1 Review Hide Reviews Show Reviews
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Difficult to install
Seems ok but very difficult to install, instructions are not clear on which bolts goes where and the bottom bolt to lock the unit together with the door frame actually clashes with the lock mechanism. The lock itself if basically a generic Chinese made version that has been rebadged as McGrath. I have seen similar locks on Amazon for $100 cheaper.
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