Search  for anything...
Master Lock

Master Lock Heavy Duty Disc Padlock [Combination] [Stainless Steel] [Outdoor] M40EURDNUM - Best Used for Storage Units, Sheds, Garages, Trailers and More

  • Based on 4,601 reviews
Condition: New
Checking for the best price...
$28.36 Why this price?
Save $9.59 was $37.95

Buy Now, Pay Later

As low as $7 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is returnable

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Aug 26
Order within 5 hours and 19 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Features

  • Multiple padlock applications: For indoor and outdoor use; stainless steel discus padlock is ideal used for self storage units, sheds, trailers, moving trucks, vans and more.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit
  • Durable design: padlock has a stainless steel body construction and covered keyway for maximum weather resistance, and a reinforced body bumper for scratch resistance
  • High security combination: Set-your-own four-digit combination for convenience and security; 10,000 possible combinations
  • High security shackle: Tough-Cut octagonal boron carbide shackle that is 50 percent harder than hardened steel and fully shrouded design minimizes shackle exposure and protects against bolt cutter attacks
  • Specifications: padlock dimensions (W x D) 7 x 3 cm; shackle (A x B x C) 1 x 1.6 x 2.1 cm; one padlock; reset tool included
  • Limited lifetime guarantee

Description

The Master Lock Excell No. M40EURDNUM solid body padlock features a 70 mm wide stainless steelbody for strength, reliability and corrosion resistance. The 10 mm diameter octagonal shackle is 16 mm long and made of Tough-Cut boron-carbide, 50 percent harder than hardened steel, offering maximum resistance to cutting and sawing. The reinforced body bumper protects against scratches. The lock includes set-your-own combination convenience, with the need of the included reset tool. This padlock is ideal for self storage units, sheds, trailers, moving trucks, vans and more. The limited lifetime warranty provides peace of mind from a brand you can trust. Set Contains: 1 x padlock & reset key

Brand: Master Lock


Special Feature: Anti-Drill, Cut Resistant, Passcode Unlock, Resettable, Weather Resistant


Lock Type: Combination Lock


Item dimensions L x W x H: 3.66 x 2.76 x 1.18 inches


Material: Stainless Steel


Brand Name: Master Lock


Recommended Uses For Product: Security


Number of Pieces: 1


Included Components: 1 padlock


Model Number: M40EURDNUM


Model Name: Excell Disc padlock


Global Trade Identification Number: 08


Number of Items: 1


Manufacturer: Master Lock


Unit Count: 1 Count


Item Type Name: MASTER LOCK High Security Disc Padlock [Combination] [Stainless Steel] [Outdoor] M40EURDNUM - Best Used for Storage Units, Sheds, Garages, Trailers and More


Manufacturer Part Number: M40EURDNUM


Additional Features: Anti-Drill, Cut Resistant, Passcode Unlock, Resettable, Weather Resistant


Lock Type: Combination Lock


Controller Type: Hand Control


Control Method: App


Style Name: Combination


Color: Silver


Material Type: Stainless Steel


Finish Types: Zinc


Item Dimensions: 3.66 x 2.76 x 1.18 inches


Item Weight: 0.31 kg


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Aug 26

This item is non-returnable:

This item is returnable

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Heavy duty!
Style: Combination
Very solid, heavy duty lock. Comes with a key (don't loose it!) to reset the combo when you need to. Number dials are tough to turn, but I take that as a sign of it's robustnesss--if you have weak fingers, maybe not the lock you want.
Reviewed in the United States on January 4, 2019 by Rick&Les
    • BE VERY CAREFUL RESETTING THE COMBO!
Style: Combination
We purchased this lock for a storage. We followed the instructions. The lock looks strong but it does not work very well the rotating numbers are difficult to line up and you are never sure whether you have them in alignment or not as there is no definitive click even if you are using any set of numbers (you wouldn't want it to be definitive only when you had the correct 4). I used the code behind the key on the back and got the lock to open then I opened the bolt and inserted the little combination key and rotated clockwise then I set the new code. turned the key removed the key after turning it counter clockwise to set the new code closed the bolt and tried to open it with the new code and it didn't work. Then I tried to go back to the original code but it didn't open so then I tried multiple combinations used the new code but changing each dial either up one number or down one number on each code ring. Then I tried adjusting two at number rings at a time using the same methodology and never got it open again. So, it may be operator error but be careful because your will be in trouble. I thought i followed the intructions to a T but no such luck. Then I searched online to see if there was a number to call to try to reset it since I have the original combo and key. No luck. ... show more
Reviewed in the United States on June 18, 2025 by Dan
    • Good quality
Style: Combination
Good product and easy to reset codes. Although it feels like the internal parts need to be better lubricated, it's an easy fix with some WD40 or other synthetic lubricants.
Reviewed in the United States on August 4, 2025 by PA
    • Heavy Duty Locks
Style: Combination
Review Image by Psquare
Review Image by Psquare
I needed some good locks to lock down my father’s gates to his fence as we go through probate to settle things. These locks are great to protect from gaining access to the gates. I had some of the thinner metal locks on the gate and some cut through that lock. Well, they will not cut through these locks. The are really heavy and great quality. I did find the instructions a little hard as mines got torn off when I opened the packaging and it took me an hour to try and understand where are they located and I finally found the passcode and stuff. It was torn off with the packaging so I never found it where it said it’s was. Need to do a better job of placing the passcodes where they will not get torn with the packaging and then you can not find it as I thought it did not come with a passcode. Other than that, excellent heavy locks to secure a gate or anything more securely. They are expensive but worth the extra cost. ... show more
Reviewed in the United States on February 4, 2024 by Psquare
    • Fantastic product and service
Style: Combination
First off, customer service from The Big Red Toolbox is fantastic. I had a problem with the product (total fluke) I received and had it resolved very quickly. These guys know what they are doing. As for the lock its quality, it is fantastic. You will need to lube the lock up with some oil when you receive it due to some of the moving parts but after working the oil in for about a minute the lock works flawlessly. I can also say this lock will be a thief's nightmare, its very very hard to cut this off. You pretty much need an angle grinder to cut this thing off. Already received 2 locks, if I need any more I will return here for the same lock from the same seller. 100% recommend this product and company. ... show more
Reviewed in the United States on July 21, 2017 by Josh Sherlund
    • Poor Design & Functionality
Style: Combination
This name brand combination lock is a disappointment. It's solid and heavy duty but difficult to use. The numbers are very hard to turn and must be placed exactly right (which is not right at the marks but a bit below). Because all the tumblers are sunken down the ones on far right and far left are even harder to manipulate. I would send it back but I sprayed it with oil hoping to make the tumblers easier to turn - but that didn't work at all. I will be tossing it. What a waste. I expected a much more thoughtful design and smooth functionality from Master Lock. ... show more
Reviewed in the United States on July 18, 2025 by Margaret J. Sheldon
    • Very Good Lock
Style: Combination
Needed a lock for a Pod shipment - This one is easy to reset the combo with the included key, easy to open and easy to lock. Quite heavy and feels like a secure piece of hardware. Much easier to use than those locks with the combo in the bottom I hope I don't need to replace it - but if I had to, I'd get one of these again. ... show more
Reviewed in the United States on April 18, 2024 by B. E. Parker
    • A Master Lock that is actually half decent!
Style: Combination
Review Image by Sawyer
Review Image by Sawyer
As someone that picks and decodes master locks frequently and publicly laughs at them for how bad they are, this is ACTUALLY a half decent lock. Pros: 1. Thick lock with boron carbide shackle that is very difficult to cut. I tried cutting it with a pair of Texas keys and to no avail. (See photo) 2. Due to the grittyness of this lock's internals decoding it is near impossible to achieve. However this can be a con (see cons below). Cons: 1. The lock's internals are gritty and comes with no lubricant in it at all which makes it a bit hard to open and close as well as using the dials. What this means is that in the winter time it could potentially freeze up and become unusable. However, all you need to fix that is to shoot it with WD-40 then apply lock lubricant in it afterwards when you receive it. Do this every few months and it should work perfectly. 2. The lever that pulls the shackle down is a bit flimsy and has potential to break. Make sure it's in good by knocking it in with a hammer otherwise it might come out. So because of those two con reasons I will give this a 3/5. ... show more
Reviewed in the United States on September 10, 2021 by Sawyer

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...