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  1. Home
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  3. CompX Chicago
  4. CompX Chicago MMC51 - MMC75
  5. Lock Code List

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CompX Chicago MMC51 - MMC75 Series Lock Code List

MMC51
MMC52
MMC53
MMC54
MMC55
MMC56
MMC57
MMC58
MMC59
MMC60
MMC61
MMC62
MMC63
MMC64
MMC65
MMC66
MMC67
MMC68
MMC69
MMC70
MMC71
MMC72
MMC73
MMC74
MMC75
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Key Rings

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Color Split, Giveaway, Cable & More Key Rings

 

Graphite Lubricant

Use a lubricant when using new keys in old locks

Use a lubricant when using new keys in old locks

 

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I Can't Read My Lock Code. How Do I Read It?

I Can't Read My Lock Code. How Do I Read It?

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Showing 20 most recent reviews
Daniel
Jul 25, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Good stuff Easy ordering”
Chancellor
Jul 25, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Using heip support to create a photo of broken key and lock code has been helpful for me to get the results needed to order a new key for my lock box.”
Norman
Jul 25, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“My experience was great. ”
Randy
Jul 25, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“It's easy to use and having a code helps.”
Joseph
Jul 25, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“The easiest way to get keys made”
David
Jul 25, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Good”
Irene
Jul 25, 2026
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★ ★ ★ ★ ★
“Hope the key blank works. Would have liked more details.”
Joel
Jul 25, 2026
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★ ★ ★ ★ ★
“Great site! Picture can be included, and that is important. ”
Anthony
Jul 25, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Hope this fits, see the pic. The shipping cost is a little much, it can go in a letter envelope for the cost of a stamp... just feels excessive. I'd pay more for the key to not feel like I'm getting hosed on the shipping... ”
Joseph
Jul 25, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Very easy to find and order what I was looking for.”
Donald
Jul 24, 2026
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★ ★ ★ ★ ★
“Easy site to work with ”
Gerald
Jul 24, 2026
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★ ★ ★ ★ ★
“Excellent customer service. Quick responses ”
Kevin
Jul 24, 2026
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★ ★ ★ ★ ★
“Was great ”
Vivian
Jul 24, 2026
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★ ★ ★ ★ ★
“You guys are great! Accurate keys and fast shipping :)”
Matthew
Jul 24, 2026
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★ ★ ★ ★ ★
“you all are awesome. ”
David
Jul 23, 2026
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★ ★ ★ ★ ★
“Awesome!”
David
Jul 23, 2026
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★ ★ ★ ★ ★
“Thank you, it was fast and easy.”
Robin
Jul 23, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Ordering was easy. I'm thrilled that you all asked for photos. I won't know exactly how well it went until my key arrives, though. Fingers crossed! ”
Karen
Jul 23, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“These keys are not even close to what I ordered. I need to return them. Help please.”
Kat
Jul 23, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
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