Master Lock LOTO + Padlock Range — Quick Reference
Master Lock is the global LOTO standard — every Australian site with isolation procedures uses Master Lock or equivalent. Selection turns on application (security vs isolation), shackle dimensions (lock body size + opening diameter), and keying (alike/different/master-keyed).
| Lock Type | Best For | Compliance |
|---|---|---|
| Safety LOTO Padlock (Thermoplastic Body) | Equipment isolation — colour-coded for trade/shift/department | AS/NZS 4836 + AS 4024 isolation standards |
| Safety LOTO Padlock (Aluminium Body) | Heavy-duty isolation, mining + petrochemical | AS/NZS 4836 |
| Keyed Alike (KA) | Master-keyed isolation systems — one key opens many locks | Site-procedure dependent |
| Keyed Different (KD) | One person, one key — personal isolation only worker can remove | One-person-one-lock LOTO principle |
| General Purpose Brass Padlock | Security — sheds, gates, equipment cabinets | Security rated by series |
| Hardened Steel Padlock (ProSeries) | Container, yard, hi-security applications | Boron-alloy shackle + cut-resistant |
| Hasps + Lockout Stations | Multi-worker isolation — hasp accepts multiple locks (1 per worker) | AS/NZS 4836 |
| Tagout Tags + Cable Lockouts | Communicating isolation status + locking valves/switches/breakers | AS/NZS 4836 |
| Group Lock Box | Group isolation — supervisor locks isolation keys in box, workers add personal locks | AS/NZS 4836 |
Critical LOTO rule: One person, one lock, one key. NEVER share LOTO padlock keys. Personal lock can only be removed by the person who applied it (or formal authority-removal procedure for absent worker). Companion: lockout/tagout, safety equipment, LOTO guide.
Master Lock Padlocks & Lockout Tagout (LOTO) Equipment
Master Lock is a globally recognised leader in security and safety lockout products, trusted by safety managers, maintenance supervisors and site engineers across industrial Australia. With a heritage spanning over 100 years, Master Lock combines proven padlock engineering with a comprehensive lockout tagout (LOTO) equipment range designed to meet Australian workplace safety legislation and AS/NZS isolation standards. AIMS Industrial stocks the full Master Lock safety and security range, supplying manufacturing plants, mining operations and maintenance teams with the products they need to keep workers safe during equipment isolation procedures.
Master Lock Safety Padlocks — LOTO Compliant Isolation Locks
Master Lock safety padlocks are the foundation of any LOTO programme. The thermoplastic body range is available in multiple colours to support colour-coded isolation procedures across trades, shifts and departments — a critical requirement in mining, petrochemical and heavy manufacturing environments. Padlocks are available keyed alike (for master-keyed systems), keyed different (one person, one key) or in bulk sets for site-wide rollouts. AIMS Industrial also offers in-house laser engraving on safety padlocks for permanent personalisation.
- Master Lock S31 Safety Lockout Padlock / Isolation Lock — Red: Compact safety padlock with non-conductive body and steel shackle; the go-to isolation padlock for electrical and mechanical LOTO programmes across Australian industry
- Master Lock 410 Thermoplastic Safety Padlock — Keyed Different: Lightweight thermoplastic body safety padlock available in a range of colours for colour-coded site isolation procedures; non-conductive and suitable for electrical isolation points
- Master Lock Thermoplastic Safety Padlock Keyed Alike — Set of 6: Keyed alike set ideal for supervisor master-key systems or where multiple access points need to be locked out simultaneously with matching keys
- Master Lock In-House Laser Engraving on Safety Padlocks: Permanent laser engraving service for personalised padlocks; name, employee number or department identification engraved directly onto the padlock body for accountability compliance
Master Lock LOTO Devices, Stations & Kits
Beyond the padlock, a compliant LOTO programme requires the right isolation devices for every energy source on site. Master Lock's LOTO device range covers circuit breakers, ball valves, gate valves, butterfly valves, pneumatic lines, electrical plugs and more — ensuring every energy source can be physically locked out before maintenance begins. Complete lockout stations and personal lockout kits make it straightforward to build out a full programme from scratch, with all required devices, hasps and tags supplied together.
- Master Lock Griptight Standard Circuit Breaker Lockout: Universal circuit breaker lockout device compatible with single- and multi-pole breakers; accepts standard padlock shackles for immediate lockout of electrical distribution boards
- Master Lock Adjustable Ball Valve Lockout — 12.7mm to 50.8mm: Adjustable lockout device for ball valves in the locked-open or locked-closed position; covers a wide valve size range for process pipework isolation
- Master Lock Butterfly Valve Lockout: Purpose-designed butterfly valve lockout for process plant isolation; holds valve in the safe position and accepts a padlock through the hasp point
- Master Lock Lockout Hasp Aluminium — Spark Proof, 6 Lock: Spark-proof aluminium hasp allowing up to 6 isolation padlocks simultaneously; essential for group isolation procedures where multiple tradespeople must each apply their own lock
- Master Lock 20-Piece Lockout Station — Includes 6 Padlocks: Complete wall-mounted lockout station pre-equipped with safety padlocks, hasps, tags and lockout devices; designed for immediate programme deployment at new sites or workareas
- Master Lock Personal Lockout Kit — Electrical, Keyed Alike: Portable personal LOTO kit with padlocks, circuit breaker lockout device, hasp and tags; ideal for maintenance technicians who need a self-contained kit at the point of work
Browse Master Lock padlocks, lockout tagout & security equipment at AIMS Industrial alongside our Safety & PPE, Workshop Supplies, and Fasteners & Fixings collections. Order online or contact our team for assistance, advice or to request a quote.
People Also Ask — Master Lock Padlocks and Security
Q: What sizes do Master Lock padlocks come in?
Master Lock padlocks are typically sized by body width: small (20-30mm) for cabinets and tool boxes, medium (40-50mm) for general site and shed use, large (60-80mm) for high-security applications like containers and gates. Shackle diameter ranges from 4mm (light security) to 14mm (heavy industrial). For mining, transport, or asset security, specify the body size plus shackle clearance needed for the hasp or chain you're securing.
Q: Are Master Lock padlocks LOTO-rated?
Yes — Master Lock offers a dedicated Lockout/Tagout range that meets AS/NZS 4836 requirements. These padlocks come in safety-yellow, red, or other colours for personal LOTO identification, with key retaining design (key cannot be removed until lock is open). Standard security padlocks are NOT LOTO-suitable — they're keyed for security access, not personal isolation lockout. Use the dedicated LOTO range for any safe-isolation work.
Q: Can Master Lock padlocks be keyed alike?
Yes — Master Lock supports keyed-alike (one key opens multiple locks) and keyed-different (each lock has unique key) configurations. For fleet, gate, or facility applications where one person needs access to many locks, keyed-alike saves key management hassle. Custom keying available through Master Lock's commercial program. Specify the requirement when ordering — the lock model and the keying configuration are separate spec items.
Q: What's the difference between brass and laminated steel bodies?
Brass body: corrosion-resistant for outdoor and marine use, naturally resists oxidation. Laminated steel: stronger against cutting and prying attacks, made from layered hardened steel plates. Brass for weather-exposed locations (coastal, outdoor gates, marine). Laminated steel for higher-security environments where attack resistance matters more than corrosion. Premium models combine boron-alloy shackles with weather-resistant bodies for both.
Q: How do I choose between key, combination, and electronic Master Lock?
Key lock: fastest to open if you have the key, no batteries, classic security. Combination: no key to lose, good for shared access, slower to open. Electronic/Bluetooth: temporary access codes, audit trail, remote management — used for site security and rental properties. Match the lock type to the user pattern. Personal LOTO almost always keyed (personal-key requirement). Shared site security often combination or electronic.