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.

NEW from Ametek SCP, a range of Rugged Gigabit Ethernet Connectors. Designed for use in very harsh environments and available in D38999 and MIL-C-24231 shell configurations. Certified by ETL to TIA/EIA 568 CAT 5E and CAT 6. PATENT PENDING.
Click here to contact us for more information and a copy of our data sheet.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) 38999 (Hermetic Seal) |
SI (QPL), HSC (QPL), GSP |
MIL-DTL-83723![]() |
QPL | 83723 (Sealtron) 83723 (Hermetic Seal) |
SI (QPL), HSC (QPL), GSP |
MIL-DTL-26482 |
QPL | 26482 (Sealtron) 26482 (Hermetic Seal) |
SI(QPL), HSC (QPL), GSP(QPL) |
MIL-C-81703![]() |
81703 (Sealtron) 81703 (Hermetic Seal) |
SI, HSC | |
| MIL-C-25955 | QPL | 25955 (Sealtron) 25955 (Hermetic Seal) |
SI (QPL), HSC |
MIL-DTL-26500 |
QPL | 26500 (Sealtron) 26500 (Hermetic Seal) |
SI (QPL), HSC(QPL), GSP |
ESC 10 & 11 YE |
Qualified with Society of British Aerospace Companies (SBAC) | esc10ye (Sealtron) | SI |
EN2997 |
Qualified to the ASD specification | EN2997 EN2997Y(E) Qualified Product |
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) 5015 (Hermetic Seal) |
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
AUTHORIZED STOCKING DISTRIBUTORS
In an effort to service our customers most effectively, we have partnered with BTC Electronic Components as an authorized stocking distributor. BTC maintains a multi-million dollar inventory of standard HCC products including QPL and similar non-QPL circular connectors, D-Subs and Rack and Panel Connectors; and has part number cross-referencing available. BTC also stocks the key connector lines of Ametek SCP, which includes MIL-C-24231, MIL-C-24217 and the innovative Rugged Gigabit Ethernet Connector.
Please feel free to contact BTC Electronic Components directly. Most items can ship within one day from BTC.
BTC Electronic Components
2709 Connector Drive
Wake Forest, NC 27587, USA
Toll Free: 1-800-526-2828
Ph (919) 556-8900
Fx (919) 556-8959
Web: http://www.BTCElectronics.com
Or by e-mail at:info@btcelectronics.com
To enhance our service to our European customers most effectively, we have expanded our European operation and partnered with NYK Component Solutions as our exclusive Authorized Distributor in the UK and Republic of Ireland. NYKCS provides commercial and stocking provision to support your one off and scheduled requirements for QPL and similar non-QPL circular connectors, D-Subs and Rack and Panel Connectors; and has part number cross-referencing available.
Please feel free to contact NYKCS directly:
NYK Component Solutions
Fleming Business Centre
Leigh Road
Eastleigh
Southampton
Hampshire, SO50 9PT
United Kingdom
Telephone: +44(0) 844 8044380
In Europe: +44 (0) 2380 649662
Fax: +44(0) 844 5070997
Web: www.nykcs.com
Or you may use our RFQ form and our Customer Service team will be in contact with you as soon as possible.
Thank you.





















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