Security

AIMS Industrial stocks a genuinely deep range of commercial and high-security padlocks, security cables, key storage safes, and lockout/isolation hardware — built almost entirely around the Master Lock catalogue, with Brady safety padlocks and Champion tamper-resistant fastener tools rounding things out. Whether you're securing a construction site compound, a fleet depot, a plant room, a roller door, or a shipping container, this range covers brass, laminated steel, hardened steel, and boron-alloy padlocks across dozens of shackle and keying configurations, plus the cable locks and key cabinets that go with them. If your need is specifically personal energy-isolation lockout for maintenance work, our dedicated Lockout Tagout (LOTO) range covers that in more depth — this page focuses on physical security and the broader padlock and cable lock range, though you'll find plenty of crossover stock (thermoplastic safety padlocks, lockout hasps and stations) here too, since AIMS carries it all from the one Master Lock catalogue. Our Industrial Padlock Guide: Security Grades, Cylinder Types, Smart Padlocks & Selection for Australian Sites walks through the key differences if you're comparing options.

Quick Reference: Padlocks & Security Hardware by Type

Choosing the right padlock: body, shackle and keying

Padlock selection comes down to three decisions: body material, shackle profile, and how it's unlocked. Get these matched to the actual risk and environment and you'll get years of trouble-free service; get them wrong and you're either paying for security you don't need or leaving a gap a bolt cutter walks straight through.

Body material

Solid brass — the Master Lock Diamond series (20mm to 51mm body widths, sold singly or in multi-packs with keyed-alike options) is the standard choice where corrosion resistance matters more than outright cut resistance: coastal sites, marine equipment, irrigation and outdoor gates. Brass won't rust, but it's a softer metal than hardened steel, so it's not the pick for high-theft-risk assets.

Laminated steel — stacked steel laminations (Master Lock's 3-series and 5-series, plus the Excel and Weather Tough ranges) give solid all-round security at a lower price point than solid-steel bodies, and the Weather Tough range adds a covered design that sheds water and grit from the keyway — a sensible upgrade for anything left outdoors.

Solid steel / boron-alloy — where cut resistance is the priority, step up to Master Lock's Magnum (boron carbide shackle), 6100 Series Weather Tough, 6800 Series solid brass body with boron shackle, and 7000 Series High Security ranges. These pair a hardened or boron-alloy shackle with a solid steel or reinforced body and are the right spec for fuel farms, chemical stores, high-value plant compounds and any site with a genuine theft history.

Shackle profile

Standard shackle padlocks are the most common and easiest to fit to existing hasps and chains. Shrouded and hidden-shackle designs (Master Lock's Solid Steel Flat Back Hidden Shackle and the 40mm Brass Shrouded Padlock) reduce the exposed shackle to a sliver, so there's nowhere for bolt cutter jaws to get purchase — the standard upgrade for container doors, external gates and anywhere the padlock is genuinely exposed to attack.

Keying and access

Keyed padlocks can be supplied keyed-different (every lock its own key — the default for most stock lines) or keyed-alike, where a batch of padlocks all share one key — useful across a fleet of trailers, a bank of gates, or a set of cabinets where carrying one key beats carrying twenty. Combination and resettable-dial padlocks (Master Lock's General Security Solution and M175DLFAU resettable ranges) remove key management altogether — good for shared access points where staff turnover makes rekeying a hassle, though they trade off the ability to audit exactly who opened the lock.

High-security and anti-theft padlocks

For sites with a real theft risk — construction compounds, unattended yards, fuel and chemical storage, high-value plant — the padlock is only as strong as its weakest link, and that's usually the shackle. AIMS stocks Master Lock's dedicated high-security lines for exactly this: the 7000 Series High Security Padlock, the 6800 Series (solid brass body with a boron-alloy shackle), and the 6100 Series Weather Tough padlock, all specced around a hardened or boron carbide shackle that resists hacksaws, bolt cutters and drilling far better than a standard laminated body. The Magnum range (45mm and 51mm laminated steel bodies with boron carbide shackles) sits a step below these as a strong mid-tier option.

A security chain is only as strong as its padlock, and a padlock is only as strong as the hasp it's fitted to. We stock Master Lock's braided and woven steel security cables and chains (including the adjustable Python cable lock in several lengths and diameters, and the 229mm heavy-duty zinc-plated steel chain) specifically to pair with high-security padlocks — a boron-shackle padlock on a thin chain, or a hardened padlock on a rusted hasp, both defeat the purpose. Match the whole system to the threat level, not just the lock.

Cable locks, chains and key storage

Beyond padlocks, the range covers the hardware that goes with them. Cable locks — the adjustable Python cable (available in several lengths from 1.5m to 1.8m and diameters up to 10mm), the general-use woven steel cable, and heavier braided steel cable options — give a flexible way to secure gates, trailers, plant and equipment where a rigid chain won't reach or fit. Key storage covers wall-mounted and portable key safes (the Select Access and Select Access Push Button ranges, the Lockguard dial-combination key safe, and the compact light-up wall-mount safe) plus the simple magnetic key case for a spare vehicle or gate key — all useful where a site needs controlled access to a shared key without handing out physical copies.

Physical security padlocks vs lockout/tagout (LOTO) — know the difference

This is the single most important distinction in this range, and it's worth being direct about: a physical security padlock (brass, laminated steel, boron-alloy) is built to resist forced entry and theft. A thermoplastic safety padlock — Master Lock's 410 series, sold singly or in keyed-alike sets of 3, 4, 6 or 10, plus Brady's steel keyed-different safety padlock — is built for the opposite job: personal energy-isolation lockout during maintenance, where the point isn't defeating an intruder but stopping equipment being re-energised while someone's hands are inside it. LOTO padlocks are deliberately lightweight, cheap to issue one-per-worker, and usually keyed different so no one but the person who applied the lock can remove it.

Because AIMS carries both from the same Master Lock catalogue, you'll find genuine crossover in this collection — thermoplastic safety padlocks, lockout hasps, lockout stations, circuit breaker and valve lockout devices, and personal lockout kits all sit alongside the security padlock range. If your project is a formal isolation/lockout program rather than site security, our Lockout Tagout (LOTO) collection is built specifically around that use case with the full hasp, station and tag range. Use general-purpose security padlocks for property and asset protection; use dedicated LOTO padlocks and hasps for isolating energy sources during maintenance — the two aren't interchangeable, and mixing them up is a common (and avoidable) site safety gap.

Brands we stock

The overwhelming majority of this range is Master Lock — the padlocks, combination locks, cable locks, key storage safes, and the bulk of the lockout/tagout hardware are all Master Lock product. Brady supplies a steel keyed-different safety padlock as an alternative LOTO option. Champion contributes the OWS-RT one-way screw removal tool — not a lock itself, but the legitimate maintenance tool for backing out anti-theft fasteners once they're installed (see our security fasteners range for the screws themselves, and screw extractors for anything stripped or seized). We don't currently stock a broader spread of padlock brands in this collection — if you need a specific brand or lock cylinder profile that isn't listed, get in touch and we'll source it.

Keyed-alike, keyed-different and site-wide systems

For fleets, multi-gate sites and facilities with several access points, keying strategy matters as much as the lock itself. Master Lock's brass and laminated steel padlocks are available in keyed-alike multi-packs (commonly 2, 4 or 6 in a box) so one key opens every lock in the batch — handy for trailer fleets, storage container banks, or a row of identical gates. Where you need the opposite — every padlock genuinely unique, so a lost key on one gate doesn't compromise the rest of the site — standard keyed-different stock covers that as the default. For larger rollouts (multiple sites, dozens of locks, a mix of keyed-alike zones and standalone high-security units) our team can help plan the keying schedule before you order, rather than after the padlocks are already cut.

Companion ranges at AIMS

This security and padlock range works alongside several other AIMS collections, depending on what the job actually needs:

• Lockout Tagout (LOTO) — the full personal energy-isolation range: hasps, stations, tags, circuit breaker and valve lockout devices, and lockout kits.
• Master Lock — browse the complete Master Lock catalogue in one place, security and LOTO product together.
• Brady — Brady's safety padlock and the wider Brady identification and labelling range.
• Key Storage — key safes and key cabinets on their own, separate from the padlock range.
• Security Fasteners — tamper-resistant and one-way screws for signage, plates and public-facing fixings.
• Screw Extractors — for stripped, seized or rounded-off fasteners that need to come out.
• Chains, Cables & Cable Locks — the broader chain and cable range beyond the security-specific lines covered here.
• Safety Equipment & PPE — general workplace safety gear for sites also stocking up on isolation hardware.

Order security padlocks and lockout hardware from AIMS

Need help specifying the right padlock for a specific risk level, or planning a keyed-alike system across a site or fleet? Our team can talk you through body material, shackle type and keying strategy so you're not over- or under-speccing the job. For volume orders, multi-site rollouts, or anything not currently listed, request a quote and we'll price it properly — or get in touch via our contact page. Prefer to talk it through? Call the AIMS team directly on (02) 9773 0122 and we'll help you get the right lock on the right door the first time.

People Also Ask

What's the difference between a security padlock and a lockout/tagout (LOTO) padlock?

A security padlock (brass, laminated steel, or boron-alloy body) is built to resist forced entry and protect property. A LOTO padlock (typically thermoplastic) is built for personal energy-isolation lockout during maintenance — it's lightweight, cheap to issue to every worker, and usually keyed different so only the person who applied it can remove it. They're not interchangeable: use security padlocks for asset protection, and dedicated LOTO padlocks for isolating machinery, electrical panels or valves during maintenance work.

Are brass or steel padlocks better for outdoor use?

Brass padlocks resist corrosion better, so they're the safer pick for coastal, marine, humid or exposed outdoor sites where a steel body might eventually rust at the shackle or keyway. Steel and boron-alloy padlocks offer greater cut and pry resistance, which matters more where theft risk is the primary concern. Master Lock's Weather Tough range gives a covered, weather-resistant laminated steel option if you want a middle ground between the two.

What's the most cut-resistant padlock shackle available?

Boron carbide and boron-alloy shackles (used in Master Lock's Magnum, 6800 Series and 6100 Series Weather Tough padlocks) offer the strongest resistance to hacksaws and bolt cutters in this range, especially when paired with a shrouded or hidden-shackle body that limits the exposed metal a bolt cutter can actually get its jaws around.

Can AIMS supply padlocks keyed alike across multiple sites or a fleet?

Yes — Master Lock's brass and laminated steel padlocks are available in keyed-alike multi-packs as standard stock, and our team can help plan a keying schedule for larger rollouts spanning multiple sites, gates or vehicles before you place the order, so you don't end up with a mismatched mix of keys down the track.

What's the difference between a shrouded and a hidden-shackle padlock?

Both designs reduce the exposed shackle to limit what a bolt cutter or hacksaw can reach. A shrouded shackle is partially covered by the padlock body on the sides most exposed to attack; a hidden-shackle (flat-back) design conceals the shackle almost entirely when the padlock is fitted to a hasp, leaving next to nothing exposed. Both are a solid upgrade over a standard shackle for gates, container doors and roller doors.

Do you sell replacement keys for Master Lock padlocks?

Get in touch with our team via the contact page or call (02) 9773 0122 with your padlock's model and key code (stamped on the key or body where fitted) and we'll help track down a replacement or advise on rekeying options.

What size padlock do I need for a shipping container or roller door?

It depends on the hasp or container lock box fitted, but most shipping container and roller door applications suit a 45mm to 51mm solid steel or boron-alloy padlock with a shrouded or hidden-shackle design, since the shackle is otherwise fully exposed on these fittings. Check the hasp's jaw diameter and shackle clearance before ordering — if you're not sure, send us the hasp details and we'll match a padlock to it.