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  1. Home
  2. Browse Manufacturers
  3. Master Lock
  4. Master Lock SM401 - SM430
  5. Lock Code List

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Master Lock SM401 - SM430 Series Lock Code List

SM401
SM402
SM403
SM404
SM405
SM406
SM407
SM408
SM409
SM410
SM411
SM412
SM413
SM414
SM415
SM416
SM417
SM418
SM419
SM420
SM421
SM422
SM423
SM424
SM425
SM426
SM427
SM428
SM429
SM430
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Want it delivered Wednesday, July 29, 2026? Order by 5pm EST Tuesday, July 28, 2026 choose FedEx Overnight shipping.
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Key Rings

Color Split, Giveaway, Cable & More Key Rings

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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Google Reviews
Showing 20 most recent reviews
Bob
Jul 28, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Hope I get the right key. My remaining key has both an "A" (printed) and a "Y"(incised). I went with the "A".”
Lawrence
Jul 28, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“This is what great business looks like! I needed a replacement drawer lock for a wood file cabinet and, after sending a couple of photos of the old lock, and supplying a few dimensions, they were able to supply me with a lock that will be an exact fit! No pressure to buy anything, just good customer service!”
Michelle
Jul 28, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Customer service was very quick replying to my inquiry regarding which key I needed for a lock”
Bob
Jul 28, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Quick and easy to get some keys made and sent. Great pricing too.”
Jeff
Jul 27, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“So far so good - will see if I’m able to get into my toolbox when it gets here.”
Angelo
Jul 27, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Easy to order online and you can upload a picture of the lock to make sure you ordered the correct keys”
Dennis
Jul 27, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Fast and easy!”
Jose
Jul 27, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Professional service”
Randall
Jul 27, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“very helpful .. easy too.. Saved me a big hassle going to a hardware store and getting a badly cut key”
William
Jul 26, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Providing different type of keys replacement and fair price”
GWin
Jul 26, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“The item description indicated that it was eligible fpr free shipping, however, I did not get that. Why?”
Howard
Jul 26, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Great”
Clyde
Jul 26, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Great”
Dustin
Jul 26, 2026
✔ Verified Purchase
★ ★ ★ ★ ★
“Super easy. Feel 100% I ordered they correct keys. ”
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”
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