U-229

Today, U-229 is a topic of great interest and relevance in our society. For years now, U-229 has captured the attention of experts and professionals in different fields, as well as the general public. The importance of U-229 has been increasing as we enter an era of change and advancement in various areas. Whether in the technological, scientific, social, or cultural field, U-229 has proven to be a topic of constant discussion and debate. In this article, we will explore different aspects related to U-229, from its impact on daily life to its influence on the future of society.

This article is about an electrical connector. For the WWII U-boat, see German submarine U-229. For the isotope of uranium, see Uranium-229. For the Swedish runestone, see Gällsta Runestones.
Front panel of KY-57 showing U-229 series fill connector in center.

The U-229 is a cable connector currently used by the U.S. military for audio connections to field radios, typically for connecting a handset. There are five-pin and six-pin versions, the sixth pin version using the extra pin to power accessories. This type of connector is also used by the National Security Agency to load cryptographic keys into encryption equipment from a fill device.

It is specified by the detail specification MIL-DTL-55116D.

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