Master Lock K7CR Change Key fo...
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Master Lock K7CR Change Key for 175/176 Padlock Replacement Part

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Model: K7CR

In Stock (leaves warehouse same day if ordered before 3pm ET)

$23.45
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Master Lock K7CR Change Key for 175/176 Padlock Replacement Part

The Master Lock K7CR is a genuine replacement change key designed specifically for compatibility with Master Lock 175 and 176 series padlocks. This commercial-grade service part ensures that authorized users can perform combination changes on compatible lock models, maintaining the security and functionality of existing hardware. Sourced directly from Master Lock, the K7CR delivers the precision fit and quality construction expected from a trusted commercial lock manufacturer.

Key Features

  • Designed Compatibility: Specifically engineered for use with Master Lock 175 and 176 series padlocks, ensuring a precise and reliable fit.
  • Genuine Replacement Part: An authentic Master Lock service part for cylinders and keys, maintaining original manufacturer specifications and performance.
  • Commercial-Grade Quality: Rated for commercial applications, providing durability and reliability in demanding environments.
  • Change Key Function: Enables authorized combination changes on compatible 175/176 padlocks, supporting flexible access management.
  • Simplified Serviceability: Allows on-site rekeying or combination updates without replacing the entire padlock, reducing maintenance costs.

Technical Specifications

  • Department: Door Hardware
  • Product Category: Mechanical Locks
  • Product Group: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Subgroup: Parts and Accessories
  • Product Type: Keys
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: K7CR
  • Features: Service Parts/Cylinders and Keys

Typical Applications

  • Commercial Office Buildings with Master Lock 175/176 Padlocks
  • Industrial and Warehouse Facilities Requiring Padlock Combination Updates
  • Educational Institutions Managing Lock Combinations
  • Retail Establishments Servicing Existing Padlock Hardware
  • Government and Municipal Buildings with Ongoing Security Maintenance
  • Multi-Tenant Residential Properties Needing Padlock Rekeying
  • Facility Management Operations Supporting Master Lock Hardware

Why Master Lock K7CR?

Master Lock replacement parts like the K7CR are manufactured to the same exacting standards as the original components, ensuring seamless compatibility with 175 and 176 series padlocks. Designed for commercial applications, this change key supports efficient security management by allowing combination changes without full hardware replacement. For facilities maintaining Master Lock padlocks, the K7CR is the correct, manufacturer-specified solution for servicing cylinders and keys.

Manufacturer Resources

Product Specs

Department:
Door Hardware
Product Category:
Mechanical Locks
Product Group:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Keys
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
K7CR
Features:
Service Parts/Cylinders and Keys

Master Lock K7CR – Frequently Asked Questions

1) Will the K7CR work on any Master Lock padlock or only certain models?
Only the Master Lock 175 and 176 series. The K7CR is made specifically for those two padlock families, so if the padlock on your gate or locker is a different Master Lock series, this key will not service it. Check the model number stamped on the lock body before ordering.
2) Can a key blank like the Kaba Ilco CH1C be cut to work as a change key for a Master Lock 175 or 176 padlock?
No. The Master Lock K7CR is a factory change key made specifically for Master Lock 175 and 176 series padlocks, used to authorize combination changes on those locks. The Kaba Ilco CH1C is a key blank for the Arrow 1C keyway in nickel silver construction, intended to be cut to a pin tumbler cylinder bitting. A blank cut on a different keyway will not perform the combination change function on a 175 or 176 padlock; the K7CR is the manufacturer-specified part for that job.
3) If the padlock in question is not a Master Lock 175 or 176, is the K7CR still the right key to order?
No. The K7CR is engineered specifically for Master Lock 175 and 176 series padlocks, so its use is limited to those models. For cylinder-based hardware on other systems, the item type changes entirely - a BEST green core opening under the A keyway takes a cut operating key such as the 1A3A2KS531KS681, and Arrow 1C keyway cylinders take a blank like the Kaba Ilco CH1C cut to the cylinder. Confirm the padlock model stamped on the body before ordering the K7CR.
4) I manage a facility with dozens of Master Lock 175 padlocks. Do I need one change key per lock?
No. The K7CR is a service tool, not a per-lock item. One key handles combination changes across your Master Lock 175 and 176 padlocks, so a facilities or maintenance department typically keeps one on the key ring and updates combinations as staff turn over. Most buyers order a spare simply so a lost key does not stall the rekeying schedule.
5) Can I use the K7CR to make a duplicate key for my padlock?
No. The K7CR is a finished change key for the 175/176 series, not a blank. If what you need is stock to cut an operating key, that is a different item, for example the BEST 1AF Series patented key blank or the Kaba Ilco CH1C blank for the Arrow 1C keyway. Those are key blanks; the K7CR is a service key with a fixed function.
6) What is the difference between a change key and an operating key?
An operating key opens the lock. A change key, like the Master Lock K7CR, is used to reset the combination or service the cylinder. Cut keys sold as operating keys, such as the BEST 1A3A2 operating key for green core A keyway, are handed out to users; a change key stays with whoever controls access and should not circulate.
7) Do I have to replace the whole padlock to change its combination?
Not on a Master Lock 175 or 176. With the K7CR in hand the combination can be reset on site, which is why property managers and school facilities buyers keep one around instead of buying new padlocks every time a tenant or staff member leaves.
8) What is the difference between a change key like the Master Lock K7CR and an operating key such as the BEST 1A3A2KS531KS681?
They do different jobs. The BEST 1A3A2KS531KS681 is a cut operating key for a green core in the A keyway - it turns the cylinder to open the lock. The Master Lock K7CR is a service part that lets an authorized user change the combination on Master Lock 175 and 176 series padlocks without replacing the padlock. If the need is day-to-day access on a BEST core, the operating key is the item; if the need is resetting a 175 or 176 padlock, it is the K7CR.
9) For a facility standardizing key control, how does the Master Lock K7CR compare to the BEST 1AF patented key blank?
The BEST 1AFKEY is a Preferred patented key blank from the 1AF series, the route facilities take when they want restricted duplication on cut operating keys across a keying system. The Master Lock K7CR is not part of a keying system at all - it is a genuine Master Lock replacement service part for cylinders and keys that performs combination changes on 175 and 176 series padlocks. A key control program may use both: patented blanks for the door cylinders, and the K7CR held by maintenance for padlock combination updates.
10) Is the Master Lock K7CR a genuine factory part or an aftermarket copy?
It is a genuine Master Lock service part, catalogued by the manufacturer under cylinders and keys, and rated for commercial use. That matters on a change key more than on most parts: a copy cut slightly off will not index the change mechanism correctly and can leave a padlock stuck between combinations.
How fast can I get the Master Lock K7CR delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Master Lock K7CR come with a warranty?
Absolutely. The Master Lock K7CR is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Master Lock K7CR?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Master Lock K7CR from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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