Difference between PT and PT4 Key | Ask the Experts


I have a Yale factory key, but it only has a single letter stamp on it, but will not fit into any Yale cylinders. What could it go to?



A lot of larger manufacturers make competitors keyways. For instance, Yale actually makes Best Small Format keys in the A-M keyways (not including I) and Yale also offers the Schlage C keyway. It can be confusing because the keys will often have a Yale head. Yale is not alone in this, so if you ever have a factory original key that may not fit into the initial cylinder you think, try to find out if it could fit into the cylinder of a different manufacturers keyway.

For additional information or to place an order, contact your local IDN.

In addition to a broad offering of product and service solutions, IDN offers pre-sale and post-sale technical support.  The benefit to you is that we make security simple.  Whether your task is related to high-security systems, electronic access control, door installation, or other, our experts are here to assist.  Just let us know how we can help. 

Do you have a question, or need a quote? Contact your local IDN Branch, or ask the Electronic Access Control Ace through our website.

© Copyright IDN, Inc.