CompX Chicago 3S91 Replacement Key
Key Series 1S01 - 9S50
CompX Chicago 1S01 - 9S50 - 3S91 Replacement Key
CompX Chicago 1S01 - 9S50 - 3S91 Replacement Key
$8.87
Free shipping eligible
Ships free when your cart contains only free-shipping items and totals $35+.
Important: Matching the key number alone is not always enough. Confirm that CompX Chicago is the manufacturer and 3S91 is the exact key/lock code for your lock. The code may be located on the original key, lock face, back of the lock, key tag, or a label on or inside the equipment.
KEYS CUT On 1041Y KEY BLANK.
RECOMMENDED PRODUCTS
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Free shipping not eligible
Shipping charges will apply to this item.
Added To Cart!
Want it delivered Tuesday, October 27, 2026? Order by 5pm
EST
Monday, October 26, 2026
choose FedEx Overnight shipping.
My Cart
There are no items in your cart.
Spend $35+ on qualifying items to unlock FREE U.S. domestic shipping.
Orders of $35 or more of eligible items may qualify for FREE Shipping.
We provide tracking & delivery confirmations on all USPS & FedEx shipments. View Terms
Email &
Live
Chat Service
8:30 AM - 5:00 PM ET M - F
Use LiveChat & Email
(real humans)
New Products
Graphite Lubricant
Magnifying Card Light
Customer Reviews
What Our Customers Say
Honest feedback from customers who purchased from EasyKeys.
Showing 20 most recent reviews
Candido
Oct 25, 2026
“Very easy to find what I needed. ”
Denise
Oct 24, 2026
“Seemed very easy”
Randy
Oct 24, 2026
“Good ”
Anastasia
Oct 24, 2026
“It would be helpful to have a final order to review before submitting to ensure both billing and shipping addresses are entered separately and correctly, and to confirm all details.
”
John
Oct 24, 2026
“Website usefully in every way”
Janice
Oct 24, 2026
“Somehow I received the wrong key and never could talk with a person to handle this. Sending back wrong key you sent.my authorization #wasRA 519877 ”
Ryan
Oct 24, 2026
“It was so easy to order my new keys. I like the option to include pictures. It reassured me that I will get the right keys made. Thank you for a great ordering experience. ”
David
Oct 24, 2026
“PAINLESS”
Rusty
Oct 23, 2026
“Don’t have the key yet so not 100% sure it is correct but confident it is. The ordering process was straightforward. ”
Michael
Oct 23, 2026
“So far so good”
Rosetta
Oct 23, 2026
“Very user friendly and quick shipping”
Sarah
Oct 23, 2026
“Was easy to use. ”
Shawn
Oct 23, 2026
“The website was easy I was able to upload a picture. I have confidence that the keys I ordered will be correct. ”
mohammed
Oct 23, 2026
“Awesome”
Mandy
Oct 23, 2026
“The name says it all - EASY”
Forrest
Oct 22, 2026
“Easy very easy
”
Stephen
Oct 22, 2026
“It has it's moments. I am not used to uploading items but I understand the security”
Christina
Oct 22, 2026
“The website was very simple and easy to use!”
Victoria
Oct 22, 2026
“Communication with the EasyKeys team was very easy to confirm what was needed before purchasing.”
Rita
Oct 22, 2026
“Easy to use. Found what I needed. Took very little time.”