Model # UMBS0B06

Internet #202176537

Store SKU #326264

Gibraltar Mailboxes 6 in. Universal Mailbox Mounting Bracket

Gibraltar Mailboxes

6 in. Universal Mailbox Mounting Bracket

  • Universal Mounting Bracket
  • Accommodates standard, large, and extra large mailboxes
  • Made of heavy-duty steel
$997 /each

Frequently Bought Together

Product Overview

The Gibraltar Industries 6 in. Mailbox Mounting Bracket is designed to fit mailboxes with mounting holes on either the side or underneath the mailbox. This mounting bracket is designed to support most light and heavy-weight mailboxes.

  • Bracket easily mounts to mailbox with side or bottom mounting assembly
  • Supports most standard and large size mailboxes
  • Heavy-duty steel construction
  • All Assembly hardware included

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Does this bracket expand to fit the Gibralter Mailsafe II mailbox which is 11.74 inches wide?

Asked by: LynnG
I have a standard T1 mailbox. No need for spacers as the bracket fits perfectly under the mailbox. The problem is the screws did not fit into the nuts. Screws broke and screw heads stripped when untightening them. Very poor quality screws that don't fit into the nuts.had to use my own screws and nuts.
Answered by: john
Date published: 2016-09-30

I want to replace mailbox on a wrought iron support. It is about 6 inches wide with scroll work ...

I want to replace mailbox on a wrought iron support. It is about 6 inches wide with scroll work between the posta. Current box is attached by brackets and screws. Will this mounting bracket work?
Asked by: jdy
Thank you for your interest in our products. No we do not recommend the universal mounting bracket to be used on an iron fence.
Answered by: Gibraltar support
Date published: 2017-06-12

Im using a 4x4 post for a standard mailbox so what do i need to attach the post under the mailbox

Asked by: Itsonlyaskintag
I've seen most, if not all, reviews complain that the post hole is too small for their posts. Well, here's a new flash...a normal 4x4 post is actually 3-1/2 x 3-1/2, NOT 4 x 4. I measured the post opening and it's exactly the right fit.
Answered by: JimA
Date published: 2017-03-10

I have Gibraltar sdpk0000 mounting post & oasis jr elite mailbox with 4x10 bolt hole pattern. Will this bracket work?

Asked by: Emma
Thank you for your interest in our products. No Gibraltar post and mounting brackets are only compatible with Gibraltar mailboxes.
Answered by: Gibraltar support
Date published: 2017-06-18
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Customer Reviews

6 in. Universal Mailbox Mounting Bracket is rated 2.9 out of 5 by 11.
Rated 5 out of 5 by from metal is stronger than plastic Read other reviews where they were concerned about the opening fitting a 4 x 4 post. Believe the opening is fine the way it is, just use your hammer to tap the plate level with top of post, it will fit, then run the screws into the sides of post...substantial. Metal sure beats plastic. This is a great accessory and easy to use. Allows for various types of attachments. Great design!
Date published: 2012-06-19
Rated 5 out of 5 by from easy to install, good price I liked this product because it was a good price and made sturdy. I needed something to hold up the weight of a large locking mail box and this bracket gets the job done. Fits snugly on the 4x4 post with some a few taps with a mallet.
Date published: 2012-09-28
Rated 5 out of 5 by from Worked as it was supposed to I attached the bracket to the mailbox post arm. The instructions were fine and I used the spacers to elevate the bracket from the arm and used the supplied wood screws to attach. The mailbox lined up and attached to the bracket perfectly. It seems pretty durable.
Date published: 2016-10-11
Rated 2 out of 5 by from Shoddy Manufacturing The door fell off the mailbox. It was so much trouble to install, that I just put a screw in it and decided not to return to Home Depot.
Date published: 2016-09-13
Rated 1 out of 5 by from Not what I call "universal" THE MAILBOX'S PREDRILLED HOLES DO NOT LINE UP WITH A UNIVERSAL MOUNTING BRACKET'S HOLES. I guess that's on me since the brand for the bracket that was at the Home Depot store is Gibraltar an the mailbox brand I purchased with Home Depot on-line is Salisbury, but you'd think that the mailbox saying it is a "standard" configuration and the bracket saying "universal" that it would still work. That said, it seems like it would be sturdy and was priced well. Maybe it will work for people who purchase a Gibraltar brand mailbox.
Date published: 2015-09-19
Rated 4 out of 5 by from Does the job with a little alteration When I saw this product I was glad to find a durable product, with universal holes, at a reasonable price. When I purchased the product and took it home to assemble with my mailbox and 4x4 post I was disappointed that the post hole on the mount was not quite big enough to fit around my 4x4. This was easily fixed by using some plyers to bend the post brackets back slightly. It now fits perfectly and is creating a very stable base for the mailbox; however, I wish it would have fit correctly without any alterations.
Date published: 2012-03-27
Rated 1 out of 5 by from A headache to use The nuts and bolts this product came with don't fit each other. They are very poor quality nuts and bolts. The bolts would tighten within a few threads to the point you can't tighten any more without the screw breaking. Two screws broke while forcing them to tighten. It's like the screws are two wide for the bolts. I had to remove the other two screws and bolts with grip plyers because while trying to unscrew them, the screw heads stripped very easily. I had to use my own screws and bolts. Stay away from this product. Not worth the $10 or headache.
Date published: 2016-04-11
Rated 3 out of 5 by from Good product The mounting bracket is well designed and sturdy. There are a few different nuts, bolts, spacers & screws. Take your time and remember measure twice, cut/drill once.
Date published: 2016-04-18
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