# ITT Cannon T9, T12 and T112 suffix explained

**URL:** <https://forum.digikey.com/t/itt-cannon-t9-t12-and-t112-suffix-explained/8788>\
**Category:** Circular Connectors\
**Tags:** itt-cannon, part-numbering, interconnect, circular-connectors\
**Created:** [September 17, 2020, 1:44pm UTC](https://forum.digikey.com/t/itt-cannon-t9-t12-and-t112-suffix-explained/8788 "2020-09-17T13:44:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![David\_1768](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1768/32/9762_2.png) [@David\_1768](https://forum.digikey.com/u/David_1768)\
**Post date:** [September 17, 2020, 1:44pm UTC](https://forum.digikey.com/t/itt-cannon-t9-t12-and-t112-suffix-explained/8788/1 "2020-09-17T13:44:31Z")

</div>

![27961-15](https://global.discourse-cdn.com/digikey/original/2X/5/527ec25dd11f61fa823b7f1b27644f56c5135479.jpeg)

When comparing these Circular Connector Contacts like [27961-15 **T9**](https://www.digikey.com/product-detail/en/itt-cannon-llc/27961-15T9/27961-15T9-ND/8789338), [27961-15 **T12**](https://www.digikey.com/product-detail/en/itt-cannon-llc/27961-15T12/27961-15T12-ND/4734623) and [27961-15 **T112**](https://www.digikey.com/product-detail/en/itt-cannon-llc/27961-15T112/27961-15T112-ND/5005638), from ITT Cannon LLC, the only difference is with the added **T9** , **T12** and **T112** suffixes.

These suffixes call out the plating on the contacts.

T9 = Silver Finish  
T12 = Standard Gold Finish  
T112 = Heavy Gold Finish

[Click here for the Datasheet](http://www.ittcannon.com/Core/medialibrary/ITTCannon/website/Literature/Catalogs-Brochures/Veam_CIR.pdf). This information is located under **General Specifications** at the bottom of Page 7.