Circular Connectors
For sixty years, the HCC Industries family of companies has been providing the technological know-how to meet the unique requirements of the defense and aerospace industries, as well as those customers in other industries using circular connectors in their applications.
HCC circular connectors conform to the design and performance requirements of:
| Part / Series Number | Military Qualification | Detailed File Links | HCC Facility |
MIL-DTL-38999![]() ![]() ![]() |
QPL | 38999 (Sealtron) | SI (QPL), HSC (QPL), GSP |
MIL-DTL-83723![]() |
QPL | 83723 (Sealtron) | SI (QPL), HSC (QPL), GSP |
MIL-DTL-26482 |
QPL | 26482 (Sealtron) | SI(QPL), HSC (QPL), GSP(QPL) |
MIL-C-81703![]() |
81703 (Sealtron) | SI, HSC | |
| MIL-C-25955 | QPL | 25955 (Sealtron) | SI (QPL), HSC |
MIL-DTL-26500 |
QPL | 26500 (Sealtron) | SI (QPL), HSC(QPL), GSP |
ESC 10 & 11 YE |
Qualified with Society of British Aerospace Companies (SBAC) | esc10ye (Sealtron) | SI |
EN2997 |
Qualified with the European Association of Aerospace Manufacturers (AECMA) | EN2997 | SI |
| Additional Series MIL-C-19572 ![]() MIL-C-22539 MIL-C-81511 ![]() NAS-1599 ![]() MIL-C-24217 MIL-C-22249 MIL-DTL-5015 ![]() |
Commercial Equivalent | MIL-C-19572 MIL-C-22539 MIL-C-81511 NAS-1599 MIL-C-24217 MIL-C-22249 5015 (Sealtron) |
SI, HSC, GSP |
Click here for additional general specifications about the various connector mil spec.
HCC also offers coaxial connectors that meet the mechanical interface requirements of:
- MIL-C-21367
- MIL-C-39012
- MIL-C-24231
Photos: Custom Connector Examples





















HCC Industries Corporate | tel: 626.443.8933 | 4232 Temple City Blvd. Rosemead, CA 91770