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Industrial Safety Equipment & PPE — ANSI/OSHA Compliant
Industrial Safety Equipment & PPE — ANSI/OSHA Compliant
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Master Lock 410GRN Green Safety Lockout Padlock — Color-Coded LOTO

Master Lock SKU: 410GRN Lockout Padlock GTIN: 071649078958
★ ★ ★ ★ ☆ 4.33 (9 Amazon customer reviews)
$14.99 $15.22
Final price set by Amazon · may vary

EDITORIAL REVIEW: 4.5/5 — WC Safety Review of the Master Lock 410GRN, a green color-coded safety lockout padlock. Editorial assessment by Steven Eaton, WC Safety editor, based on published Master Lock specifications...

Key Features
  • Lockout tagout lock is best used for electrical lockout applications as part of a comprehensive OSHA compliant safety program
  • Zenex thermoplastic safety lock body is durable, lightweight, and non-conductive; functions in temperatures from -70 to 350 degrees Fahrenheit
  • Features a cylinder that is reserved for safety padlocks; key retaining feature ensures padlock is not left unlocked
  • 1-1/2 in
  • Includes one green lockout tagout padlock, one key
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EDITORIAL REVIEW: 4.5/5 — WC Safety Review of the Master Lock 410GRN, a green color-coded safety lockout padlock.
Editorial assessment by Steven Eaton, WC Safety editor, based on published Master Lock specifications and OSHA 29 CFR 1910.147. We did not laboratory-test this product.

The Master Lock 410GRN is a green aluminum safety lockout padlock for color-coded LOTO programs, OSHA 29 CFR 1910.147 compliant and keyed for personal lock control — it isolates a locked-out energy point; it does not replace a written energy-control procedure or the verification step the standard requires.

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Why the Master Lock 410GRN suits a color-coded LOTO program

A lockout program runs smoother when a glance tells you whose lock is on a device — that is what color-coding delivers, and a universally recognized brand makes it foolproof. The 410GRN pairs both: a green aluminum safety padlock in Master Lock's instantly identified livery, so a green lock reads as "maintenance crew" (or whatever your program assigns) even to a contractor who has never seen your equipment. As lockout padlocks go, this is the brand-recognition, color-coding pick, and the lockout/tagout guide and the best padlocks guide put it in context. It makes lock ownership obvious at a glance.

Safety first: a lockout padlock isolates hazardous energy, but the lock is only half the job — OSHA 29 CFR 1910.147 requires a written energy-control procedure and a verified zero-energy state. After applying locks and tags you must test to confirm a zero-energy condition (the try-out step) before any work begins; a padlock without a documented procedure, authorized-worker training, and verification is not compliance. Give each authorized worker their own key, and never remove another worker's lock.

What the Master Lock 410GRN listing documents

From the published specs: a green safety color for program color-coding; an aluminum body for lightweight daily carry; keyed operation for personal lock control; and OSHA 29 CFR 1910.147 compliance. These are true green safety padlock and lockout color-coding padlock credentials as an OSHA 1910.147 padlock. Confirm the keying (KA/KD), shackle, and dimensions on the listing.

How the Master Lock 410GRN compares to other lockout padlocks

For a long-shackle keyed-alike padlock, the ABUS 2ALHB; for a red safety padlock, the American Lock A1107R; for an aluminum keyed-different padlock, the Brady SafeKey; for a full red crew set, the TRADESAFE TS1KD10R 10-pack; and for a yellow crew set, the TRADESAFE TSKAU10YL. The best padlocks guide ranks the field.

Choosing the right lockout hardware

Build the full kit around the padlock. Browse the lockout padlocks, lockout hasps, cable lockouts, plug lockouts, lockout tags, and lockout stations collections; and read the complete LOTO guide, the best kits guide, the OSHA PPE requirements guide, and the NFPA 70E arc-flash guide for electrical energy control.

Where it fits by program and crew orders

The 410GRN suits general-industry maintenance and multi-trade facilities that run a color-coded lockout program and want a recognizable, budget-friendly standard-duty padlock — browse the wider lockout/tagout range, and pair with a group group hasp where several workers lock one point. Color-coding pays off most in facilities with rotating contractors and multiple trades: assigning green to one crew means a supervisor can walk a line and read, without asking, who has isolated what. Standardizing on one recognizable brand across the program also removes the guesswork a mixed bag of unbranded locks creates during an audit. Confirm the keying and shackle on the listing, give each worker their own key, and retire any lock whose mechanism no longer works reliably. For crew orders, quantity purchasing runs through a free Amazon Business account — volume pricing, PO numbers at checkout, and tax-exempt eligibility for qualifying organizations, with the walkthrough linked in our footer.

Brand / Vendor
Master Lock
Model / SKU
410GRN
Product Type
Lockout Padlock
Condition
New
MPN
410GRN
Price
$14.99 (Amazon)
Rating
4.33 / 5 — 9 reviews
Availability
Check current availability on Amazon
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Verified Buyer Reviews

Customer Reviews

★★★★☆4.5 / 5· 281 ratings on Amazon
★★★★★
Came very quick.
Its a nice sturdy lock.
Verified Purchaser · March 26, · ✓ Amazon Verified Purchase
★★★★★
For its intended purpose - safety lockout - it's pretty good. It's not coming off the machine it's ...
For its intended purpose - safety lockout - it's pretty good. It's not coming off the machine it's locking without a key or destroying it.For hobby lockpickers like me it's great because it's got the best core Master makes. Ok, that's not saying much, but seriously the 6-pin core on this thing is actually pretty good despite having been made by Master. This lock is harder to pick than an American 1100. Which, really, begs the question why their best core can only be found in a plastic lock when they've got locks that are invulnerable to any destructive attack short of power tools that can be picked by a 10 year old. But still, I think this lock is an essential addition to any intermediate hobby lockpicker's collection.
Verified Purchaser · June 12, 2 · ✓ Amazon Verified Purchase
★★★★☆
Lockpicker's Dream
First of all, never pick a lock you don't own, and never pick a lock that is in regular use. These rules especially apply for these locks!If you're getting into picking locks and looking for something with a few security pins on the cheap, these are the most secure cores Master Lock makes. Just don't turn the core past where it would normally go in operation, there's nothing retaining the pins and you'll get a very fancy rattle.
Verified Purchaser · April 19, · ✓ Amazon Verified Purchase
★★★★★
Lock out
Saved me from work I lost mine, but thankfully right after I got them they started writing down the serial numbers on them cause ig people did same thing as me
Verified Purchaser · July 30, 2 · ✓ Amazon Verified Purchase
★★★☆☆
Good LOTO, easy to break picking
Good core which can be dropped into an American a1100 after you over rotate it and dump the pins inside the lock body and have to break the case and put the pins back in the core. But it wasn't designed for picking so no points off on there.A bit rough, and a bit of a challenge to pick.
Verified Purchaser · December 2 · ✓ Amazon Verified Purchase
★★★★★
Very high security (except the plastic parts)
I bought this lock to practice lock picking. It was a great challenge to get into with its tiny spool and serrated pins.My brother is a truck driver and uses these on shipments that don't come with a seal. They're great for that purpose since they can't be shimmed open (ball bearing design) and are a bit of a challenge to pick. Of course, they can just be smashed open since the body is made of plastic, but that would leave a mark and let him know to report it.
Verified Purchaser · December 2 · ✓ Amazon Verified Purchase
★★★★★
Great Lock Picking Practice
It is strange to see such good pick resistance from master lock, especially in a low security plastic body lock. The pins will wear down after extended use (of practice), but that is normal. This has some deep spools and I had a lot of fun picking it open.
Verified Purchaser · November 1 · ✓ Amazon Verified Purchase
★★★★☆
Great practice lock
I bought this as a practice lock. I'm fairly new and it was a bit of a challenge. Awesome value. I made the mistake of over rotation and dropped the pins. Had to heat it up to split the welded clamshell. Taped it back together, works great still.
Verified Purchaser · May 10, 20 · ✓ Amazon Verified Purchase
★★★☆☆
Be extremely careful picking this lock or you will ruin it!
Be very careful when picking this lock open! It's a key-retaining lock but if you pick it open you won't have the key in it which allows you to turn the cylinder past the point it's supposed to turn. If you do this, the pins will fall out of the cylinder and into the inside of the lock body. This makes the lock rattle and the pins may jam up the mechanism and prevent the lock from ever opening again.
Verified Purchaser · September · ✓ Amazon Verified Purchase
Showing 9 of 281 Amazon reviews.
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Master Lock 410GRN Green Safety Lockout Padlock — Color-Coded LOTO