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Prime-Line S 4140 Mailbox Lock – Replacement, Multipurpose Mailbox Lock for Several Brands – ILCO 1003M Keyway, Opens Counter-Clockwise with 90º Rotation, Nickel Finish (1 Set)

Free shipping on orders over $29.99

$7.98

$ 2 .99 $2.99

In Stock

1.Color:Silver


2.Style:Mailbox Lock


About this item

  • REPLACEMENT LOCK – This multipurpose Prime-Line replacement mailbox lock is an easy fix and can easily replace lost or broken mailbox locks. Features 5 cams and an Hudson 1003M key
  • WORKS FOR SEVERAL BRANDS – This replacement mailbox lock works with several brands of mailboxes, including: American Device, Auth-Florence, Bommer, and Miami-Carey.
  • INCLUDES – Replacement lock kit includes a total of 5 zinc-plated steel cams, brass pins, a spring steel locking clip and 2 keys.
  • LOCKING SECURITY FEATURE – This lock has a security feature that prevents the key from being removed when in the unlocked position, which prevents forgetting the key, and ensuring the mailbox is locked every time it’s used.
  • NOTE – This mailbox lock unlocks by turning the included keys in a in the counter-clockwise direction and has a retaining hex nut and retaining clip



Rob B
Reviewed in the United States on February 3, 2025
I was very satisfied with the item. The item arrived on time and exactly as described. The item works extremely well. I will order again from this seller- very pleased customer.
Dave N.
Reviewed in the United States on January 14, 2025
It was compatible, and easy to install. Affordable too.
GAB1500
Reviewed in the United States on August 4, 2024
We have community mail boxes and I always thought the postal service was responsible for maintaining them. We dealt with a weak and then broken lock for quite some time before I learned the lock was my responsibility. Bought this lock and had the old one replaced in about 3 minutes. Comes with several sizes and shapes depending on the type of box you have, and I expect you could find at least one that would work for just about any installation. Great value.
Ladylaw
Reviewed in the United States on August 23, 2024
None of the 4 lock options fit my standard outdoor mailbox. I had to use the one I replaced that I lost the key to. All of the 4 locks are too short. Beware, and compare to your existing lock if this is a replacement.
Robert Hagedorn
Reviewed in the United States on August 13, 2024
I wish I could give more than five stars for this wonderful product. I replaced the worn out lock in my mailbox with this replacement lock. For the first time that I can remember, an off-brand replacement part was not just superior to the original part, but vastly superior. The mailbox locked cover lid for the mail receptacle was always loose when closed and locked even when new. But with the new lock it now fits perfectly tight. The replacement lock is much more difficult to pick. And the company includes five different cams for whatever size is needed. Delivery was the next day after ordering and installation is simple. I highly recommend this product.
alex yu
Reviewed in the United States on June 2, 2024
If you lost your mailbox key and only way is the replace the lock then this lock is for you. All you need is a drill corded or battery powered and a 1/2” drill bit. Mailbox lock is very easy to drill out and this lock came with several sizes of locking tongues or you can reuse your existing one. I replaced my mailbox lock in less than 10 minutes.
The Bullet
Reviewed in Canada on March 11, 2024
Ok basic
T(ed)
Reviewed in Canada on February 16, 2024
Worked great. easy install
pamibe
Reviewed in the United States on December 30, 2024
large selection of locking bars to cover just about everything
macro Len's
Reviewed in Canada on December 13, 2024
they work
Raz
Reviewed in Canada on June 23, 2019
Great product, was easy to install and does what it’s supposed to. The 5 different sizes made it easy to find a perfect fit of my mailbox.
Raul
Reviewed in Canada on October 9, 2019
It was just a plug and play. I was always told that mailbox locks are only supplied and installed by Canada Post at a high price. Fix by owner at a reasonable cost. Thank you for help.
Mark N
Reviewed in the United States on April 18, 2019
Prime-Line S 4140 Mailbox Lock performs as advertised. It popped right in with no difficulty. All my negative comments are related to MY mailbox and aren't really the fault of the mailbox lock. With that, let's dig in. So as I said, it installed quite easily. Used a channelock wrench to pull out the retaining click and used the handle of the wrench to push in the new clip (because I was too lazy to get a hammer). This lock unlocks counterclockwise and my old one unlocked clockwise. I'll just have to get used to that. I also had to remove and rotate the arm to get the lock/unlock to be positioned correctly. Although multiple arms were provided, none were exactly the right size. I ended up adding a pair of small .25" felt pads to hold the mailbox door the right distance in the closed position so the lock arm would swing into position perfectly without having me to jiggle the door to make it align with the mailbox lock slot. As I look at the other locks on the mailboxes near mine, I noticed that all the other locks had a keyhole cover. This lock does not. While a keyhole cover would be nice, our mailboxes are covered so it probably won't get rained on so for me, it probably isn't an issue. Hopefully no bugs will think the keyhole is a nice looking home... Now we'll see how well it holds up over time to determine if this was a good purchase or not.
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