Best Lockout Tagout Padlocks

What are the best lockout tagout padlocks for OSHA-compliant energy control?

Published June 28, 2026 · Last updated July 27, 2026

Short answer: For most programs the best lockout tagout padlock is the keyed-different Brady SafeKey aluminum purple (ALU-PRP-38ST-KD), which gives each worker a unique key for one-worker-one-lock-one-key compliance. For electrical and panel work, the lightweight aluminum American Lock A1107R in safety red is the standout, and for deep, scissor, or stacked hasps the long-shackle ABUS 2ALHB/40-75 reaches where standard shackles cannot.

Part of the Lockout/Tagout: The Complete Buyer's Guide — see the full guide for the OSHA 6-step procedure and device categories.

Best Lockout Tagout Padlocks (2026): Top OSHA-Compliant LOTO Locks Ranked

The best lockout tagout padlocks do one job that cannot be compromised: hold an energy-isolating device — a breaker, valve, or disconnect — in the safe position so equipment cannot be re-energized while a worker is exposed to the hazard. That mission is defined by OSHA 29 CFR 1910.147, the Control of Hazardous Energy standard, which requires a durable, standardized, substantial, and identifiable lock that only the authorized worker can remove. If you are new to the discipline, start with what is lockout/tagout and the step sequence in how to perform LOTO before you buy.\n\nThis guide ranks six lockout padlocks from the WC Safety lockout/tagout devices catalog on the factors that actually decide compliance and daily usability: keying control (keyed-different vs keyed-alike), body material and dielectric properties, shackle clearance, and whether the lock fits personal or group lockout. Picks span aluminum SafeKey locks for electrical crews, a brand-recognized steel safety lock for color-coded programs, a long-shackle aluminum lock for stacked hasps, and a portable personal kit. For help matching a lock to your isolation points, see how to choose a lockout padlock.

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1. Best Overall — Brady SafeKey Aluminum Lockout Padlock ALU-PRP-38ST-KD — Purple, Keyed Different

The keyed-different Brady SafeKey ALU-PRP-38ST-KD wins best overall because it gets the fundamentals exactly right: a lightweight aluminum body for all-day tool-belt carry and a unique key per lock, so only the worker who applied it can release it — the foundation of one-worker-one-lock-one-key under 1910.147. The purple body slots cleanly into color-coded crew or department assignment, and the SafeKey aluminum platform is the format electrical and maintenance crews reach for first. See the full Brady SafeKey purple review for the keying and material details.

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2. Best for Electrical Work — American Lock A1107R Safety Lockout Padlock — Red (OSHA Lockout/Tagout)

The American Lock A1107R is our pick for electrical and panel work: a single-purpose aluminum-body safety lock in universal LOTO red, standardized for energy-control procedures rather than general security. Its keyed cylinder stays with the worker and the distinct red body supports color-coded crew assignment on a hasp, making it instantly readable as a safety device. Read the American Lock A1107R review for the full spec breakdown.

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3. Best Premium Aluminum — Brady SafeKey Aluminum Lockout Padlock, Blue (ALU-BLU-38ST-KD, Keyed Different)

The keyed-different Brady SafeKey ALU-BLU-38ST-KD earns best premium aluminum for crews where weight and conductivity matter: the aluminum body keeps the lock light across a long shift, and Brady documents a non-conductive build that suits electrical isolation. Blue gives you another distinct color channel for multi-crew programs, and every lock ships with its own unique key. The Brady SafeKey blue review covers the dielectric and keying claims in detail.

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4. Best Rated Single Lock — Brady SafeKey Aluminum Lockout Padlock — Keyed Different (B07RM5LJHD)

The Brady SafeKey aluminum keyed-different lock (B07RM5LJHD) is our best-rated single lock, carrying a 4.3-star rating across 119 verified Amazon ratings (Amazon.com, Jun 2026). It is a single-key SafeKey aluminum padlock built for 1910.147 control of hazardous energy: the worker isolates the source, applies the lock and tag, and equipment stays de-energized until that worker removes their own lock. The Brady SafeKey B07RM5LJHD review has the verified-rating context and keying notes.

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5. Best Value Brand Lock — Master Lock 410GRN Lockout Tagout Padlock — Green

The Master Lock 410GRN is the best value brand pick for budget-conscious programs and mixed workforces: as the most widely recognized padlock brand in North America, it is immediately identified as a safety lock by any worker on a hasp. It is a non-rekeyable, safety-specific steel-body lock in green for assigning a trade, environmental crew, or department, and it is 1910.147 compliant for general industry. See the Master Lock 410GRN review for where the steel body fits best.

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6. Best Long-Shackle Lock — ABUS 2ALHB/40-75 Lockout Padlock — Long Shackle, Keyed Alike, Aluminum Body

The ABUS 2ALHB/40-75 is the best long-shackle pick: the '40' marks a 40 mm aluminum body and the '75' the extended shackle that reaches through deeper hasps, scissor clamps, and stacked lockout hasps a standard shackle cannot span. It ships keyed alike, so a single authorized employee can manage multiple isolation points with one key — useful for solo multi-point lockout, though not for separating workers. The explains when keyed-alike is the right call.

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Lockout/tagout picks compared

How to choose a lockout/tagout device

Control the keying: keyed-different for people, keyed-alike for points

Keyed-different (KD) gives every lock its own unique key, which is what one-worker-one-lock-one-key under 1910.147 demands — issue KD locks like the Brady SafeKey purple or blue so no one can remove another worker's lock. Keyed-alike (KA), as on the ABUS 2ALHB/40-75, opens a matched set with one key and suits a single authorized employee locking several isolation points at once — never for separating multiple workers. The how to choose a lockout padlock guide walks through the decision.

Match body material and dielectric to the hazard

Aluminum bodies keep locks light for daily carry, while a non-conductive body is the safer default near energized electrical work — Brady documents a non-conductive build on the SafeKey blue. A recognizable steel-body lock like the Master Lock 410GRN is a sound standard-duty choice for general industry where dielectric isolation is not the concern. Only specify a lock as non-conductive when the manufacturer states it.

Check shackle clearance against your hasps

Standard shackles cover most single-hasp lockouts, but deep hasps, scissor clamps, and stacked lockout hasps need a long shackle — that is exactly what the extended-shackle ABUS 2ALHB/40-75 is built for. Measure the thickest stack your group lockouts will produce before choosing shackle length.

Buy single locks or multi-packs by program size

Issue individual locks like the American Lock A1107R when each worker carries their own personal device, and use color to separate crews, shifts, or departments. Browse the full lockout padlocks collection to mix colors across a multi-crew program without breaking the budget.

Separate group lockout from personal lockout

Personal lockout means one worker, one lock, one key on their own isolation point. Group lockout uses a lockout hasp so multiple workers each apply their own padlock to one isolation point, and no one can re-energize until the last lock is removed — pair your KD padlocks with hasps for that workflow. A portable personal kit like the Brady 123143 bundles the core devices one worker carries to the machine.

Stock the supporting devices, not just padlocks

A complete program needs more than locks: add lockout tags to every applied lock, cable lockouts for valve wheels and oversized switches, plug lockouts for cord-and-plug equipment, and lockout stations to organize and audit devices. See the full lockout/tagout devices range to round out a station.

OSHA 1910.147 & device requirements

OSHA 29 CFR 1910.147 (The Control of Hazardous Energy) requires that lockout devices be durable, standardized, substantial, and identifiable, and that each authorized employee apply their own lock and tag to the energy-isolating device and retain sole control of its key — the one-worker-one-lock-one-key principle. Standardized means devices share a recognizable format and color within a facility; substantial means the lock resists removal without excessive force; identifiable means it indicates the worker who applied it. Keyed-different padlocks support that personal-protection requirement directly, while group lockout adds a lockout hasp so several workers each lock one isolation point. To apply the standard correctly, read what is lockout/tagout, follow the energy-control sequence in how to perform LOTO, and understand the device roles in lockout vs tagout.

Common questions

What is the best lockout tagout padlock overall?

For most programs the best lockout tagout padlock is the keyed-different Brady SafeKey ALU-PRP-38ST-KD. It pairs a lightweight aluminum body with a unique key per lock, satisfying the one-worker-one-lock-one-key requirement of OSHA 1910.147, and its color slots into crew-coded programs. See the Brady SafeKey purple review for the full assessment.

What is the best lockout padlock for electrical work?

The American Lock A1107R is our pick for electrical and panel work: a single-purpose aluminum-body safety lock in LOTO red, standardized for energy control rather than general security. For crews that want a manufacturer-documented non-conductive body, the Brady SafeKey blue is the alternative. Always confirm a lock is non-conductive in the maker's specs before relying on it near energized parts.

Keyed-different vs keyed-alike — which should I buy for LOTO?

Buy keyed-different (KD) when each worker must control their own lock, which is the core of compliant lockout under 1910.147 — locks like the Brady SafeKey purple give every lock a unique key. Buy keyed-alike (KA), like the ABUS 2ALHB/40-75, only when one authorized employee locks several isolation points and a single key is convenient. Never use keyed-alike to separate different workers. The how to choose a lockout padlock guide explains the trade-off.

Are these lockout padlocks OSHA 1910.147 compliant?

Yes — every padlock in this guide is built for OSHA 29 CFR 1910.147 energy-control procedures, with durable, standardized, identifiable bodies and keying that supports personal control. Compliance also depends on how you use them: one lock and tag per worker, sole key control, and the correct energy-control sequence. Review how to perform LOTO to apply them correctly.

What is the best long-shackle lockout padlock?

The ABUS 2ALHB/40-75 is our best long-shackle pick — the extended shackle reaches through deeper hasps, scissor clamps, and stacked lockout hasps that a standard shackle cannot span. The 40 mm aluminum body keeps it light. Note it ships keyed alike, so it suits one worker on multiple points rather than separating a crew.

Which lockout padlock is best for group lockout?

Group lockout uses a lockout hasp so multiple workers each apply their own padlock to a single isolation point, and the point cannot be re-energized until the last lock is removed. Pair the hasp with keyed-different padlocks such as the Brady SafeKey purple or blue so each worker keeps their own unique key. Browse lockout padlocks to color-code the crew.

Do I need an aluminum or steel lockout padlock?

Aluminum bodies, like the Brady SafeKey and ABUS 2ALHB/40-75 locks, are lightweight for all-day carry and are commonly favored where weight and conductivity matter. A steel body like the Master Lock 410GRN is a solid standard-duty option for general industry. For energized electrical work, prefer a lock the manufacturer documents as non-conductive.

What does the lock color mean in a LOTO program?

Color is used to assign locks to a trade, department, shift, or contractor crew so a glance at a hasp shows who applied it — supporting the identifiable requirement of 1910.147. This guide spans red (American Lock A1107R), purple, blue, and green (Master Lock 410GRN) so multi-crew programs can separate channels. Red is the universal LOTO warning color and the most widely specified. Pick colors from the lockout padlocks collection.

What is the best value lockout padlock?

The Master Lock 410GRN is our best value brand pick — it is the most widely recognized padlock brand in North America, so any worker reads it as a safety lock on a hasp, and it is priced for budget-conscious programs. It is non-rekeyable and safety-specific, intended only for LOTO personal protection. See the Master Lock 410GRN review for fit.

Which lockout padlock has the best verified ratings?

The Brady SafeKey aluminum keyed-different lock (B07RM5LJHD) carries a 4.3-star rating across 119 verified Amazon ratings (Amazon.com, Jun 2026), the strongest verified buyer signal among our picks. It is a single-key SafeKey aluminum padlock for 1910.147 control of hazardous energy. The B07RM5LJHD review has the rating context.

Can one worker use a keyed-alike set for multiple isolation points?

Yes — keyed-alike is appropriate when a single authorized employee must lock several isolation points and wants one key for all of them, which is exactly the use case for the ABUS 2ALHB/40-75. It is not appropriate when multiple workers are involved, because each worker must retain sole control of a unique key under 1910.147. When in doubt, default to keyed-different and read how to choose a lockout padlock.

What is the difference between lockout and tagout?

Lockout physically secures an energy-isolating device with a lock so it cannot be operated, while tagout attaches a warning tag that identifies the worker and prohibits operation but does not physically prevent it. Lockout is the stronger control and is required wherever an energy-isolating device can accept a lock. The lockout vs tagout guide explains when each applies, and you should attach a lockout tag with every lock.

Do I need a cable lock instead of a padlock?

Use a cable lockout when an isolation point is too large or irregular for a rigid hasp — valve wheels, bulky equipment switches, and oversized breakers. A standard padlock like the American Lock A1107R handles ordinary hasps, while a flexible cable reaches geometry a padlock alone cannot. Many programs stock both. Browse cable lockouts for the right reach.

What is a personal lockout kit and do I need one?

A personal lockout kit, such as the Brady 123143, packages the core devices one authorized worker needs — locks, a hasp, and tags — into a single portable pouch so they arrive at the machine ready to control energy. It is the backbone of a compliant program when workers move between equipment. Read the for what is included.

How many lockout padlocks should each worker have?

At minimum, each authorized worker needs enough keyed-different padlocks to cover every energy-isolating device they will lock on a given job, with one lock and one tag per point. For multi-point isolation, many crews carry several KD locks or a keyed-alike set like the ABUS 2ALHB/40-75 for a single worker. Stock spares and organize them at a lockout station.

Sources. Requirements referenced here come from OSHA 29 CFR 1910 and the NIOSH recommendations. Where a consensus standard governs, the ANSI document is named in the text.

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Why trust WC Safety

WC Safety is an independent, affiliate-supported review site. It is not a retailer: it holds no inventory, takes no orders, and earns only from qualifying purchases through clearly marked links — which never changes what a product is rated to do. Standards language is taken from the regulation text directly, and ratings are reported as the manufacturer publishes them. We run no laboratory and perform no testing of our own. Where published sources disagree, we say so and plan on the conservative figure rather than the flattering one.

Our methodology

Figures come from the regulation and the published specification, in that order. Derated numbers are calculated, not estimated. Nothing here is presented as a measured result, because we measure nothing.

Researched and written by Steven Eaton, editor of WC Safety. Steven holds no safety certification and does not test products; this page compares what manufacturers and regulators publish, with the gaps in that record marked. Last reviewed August 2026.

More questions on this topic

Where should I store and organize lockout padlocks?

Use a lockout station to mount, organize, and audit padlocks, hasps, and tags so devices are accounted for and ready to deploy. Centralized storage supports the standardized requirement of 1910.147 and makes shift handovers cleaner. Pair the station with the full lockout/tagout devices range — padlocks, hasps, cable lockouts, and tags.

Are these locks non-conductive for electrical isolation?

Only specify a lock as non-conductive when the manufacturer states it — Brady documents a non-conductive build on the SafeKey blue, which is why crews favor it for electrical isolation. Aluminum-body locks are lightweight but should not be assumed non-conductive unless the spec confirms it. When in doubt near energized parts, choose a documented non-conductive lock and follow how to perform LOTO. Why trust this guide? WC Safety is an independent industrial-PPE review site; we cover every lockout/tagout device ranked here. Picks are curated by our editorial desk against OSHA 29 CFR 1910.147 device requirements and real product specifications — not vendor preference. Disclosed: we earn Amazon affiliate commissions on outbound clicks; this does not influence rank. By Steven Eaton, WC Safety Editorial — hazardous-energy-control desk. Last reviewed: June 28, 2026 · Sources: OSHA 29 CFR 1910