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Master Lock

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

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Availability: In Stock.
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Arrives Sunday, Mar 8
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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


Lock Type: Combination Lock


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


Recommended Uses For Product: Security


Style: Combination


Brand: ‎Master Lock


Lock Type: ‎Combination Lock


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


Recommended Uses For Product: ‎Security


Style: ‎Combination


Color: ‎Silver


Number of Pieces: ‎1


Finish Type: ‎Zinc


Included Components: ‎1 padlock


Controller Type: ‎Hand Control


Item Weight: ‎0.31 Kilograms


Control Method: ‎App


Model Name: ‎Excell Disc padlock


Global Trade Identification Number: ‎08


Manufacturer: ‎Master Lock


Part Number: ‎M40EURDNUM


Item Weight: ‎10.9 ounces


Product Dimensions: ‎3.66 x 2.76 x 1.18 inches


Item model number: ‎M40EURDNUM


Is Discontinued By Manufacturer: ‎No


Size: ‎70mm


Finish: ‎Zinc


Item Package Quantity: ‎1


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: February 14, 2014


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Mar 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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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
    • Heavy Duty Locks
Style: Combination
Review Image by Psquare Psquare
Review Image by Psquare 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 Psquare
    • Apply WD40…
Style: Combination
The first one I got seized up when I tried to change the combination. It was very difficult to turn the dials and the mechanism wouldn’t turn properly. The second one I got was the same, however, after applying a bit of WD40 it worked great. I think these units might be a bit old and the lubricant has dried up. The lock itself is very durable and appears to be very strong ... show more
Reviewed in the United States on November 13, 2025 by Kit S.
    • 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 Sawyer
Review Image by Sawyer 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 Sawyer
    • Terribly hard to turn numbers and get to unlock
Style: Combination
VERY VERY difficult to move the number tumblers and they do not open the lock even when centered. It took me literally ten minutes to open this lock to get it out of its package, using the original combination provided, then another five minutes trying to open it a second time when out of its package. Terribly hard numbers to turn, almost impossible to get them to the exact spot needed for the lock to work. Padlocks should not be such an ordeal. Zero stars if I could. ... show more
Reviewed in the United States on November 26, 2025 by Amazon Customer
    • 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

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