| Name | Explanation | Examples | Pictures |
|---|---|---|---|
| K | Initials of Kalinin Design Bureau | K-7, K-12 |  |
| Ka | Initials of Kamov Design Bureau; | Ka-25, Ka-50 and more; | 
 |
| KB | Design bureau Konstructorskoe Bureau |
See KB-102 | - |
| KGB | Commetee on State Security Komitet Gosudarstvennoj Bezopasnosti |
||
| KhAI | Kharkovskij Aviatsionnij Institut Kharkov Aviation Institute |
KhAI-5 |  |
| Kolchugaluminij | First mass produced aluminum alloy in the USSR. It's composition differed from German duralumin. Production started in 1922 at Kolchugino factory, and lasted for 15 years. Soviet industry switched to duralumin at the same time when smooth aircraft skin replaced corrugated one. | ||
| KOMTA | Heavy Aviation Commission KOMissia po Tiazholoj Aviatsii |
See TsAGI Facts and KOMTA page; |  |
| KOR | Ship-borne Korablemij |
KOR-1 |  |
| KOSOS | Design Department of the SOS
TsAGI
Konstruktorskij Odel SOS TsAGI |
- | - |
| KOZOK | Design Department of the ZOK
TsAGI
Konstruktorskij Odel ZOK TsAGI |
- | - |
| KnAAPO | Komsomolsk-on-Amur Aircraft Production Association Komsomolsk-na-Amure Aviatsionnoe Proizvodstvennoe Objedinenie |
Komsomolsk-on-Amur Aircraft Production Association | - |
| KR | Ship-borne recce Korablemij Razvedchik |
KR-1 |  |
| KR | Counter-revolutioner KontrRevolutsioner |
Term used to label anti-bolshevik (later - anti-Stalin) opposition. Also - abbreviation for corresponding article in prosecution code | |
| KT | Winged Tank Krilatij Tank |
KT, KT-40 |  |
