
J599 Series III
38999 Series III type · shell sizes 9–25 · 184 insert arrangements
- Coupling
- Triple-start thread
- Shell sizes
- 9 to 25
- Insert arrangements
- 184
Mil-spec type circular connectors across 38999, 26482, 83723, 5015, Micro-D and GJB 2889.
Circular and Micro-D connector types for military, defense and aerospace equipment, from J599 Series III and YB bayonet designs to HMS31 power connectors, J30J and XC. Send your specification, drawing or part number for configuration and samples.



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This overview maps each specification type to the series Xinghua designs and makes in Shenyang, China. Compare coupling, termination, contact count, current and temperature, then send your specification, drawing or part number. We provide the corresponding configuration and samples for your verification. Minimum order quantity is 10 pcs; samples and production orders each take 4–8 weeks.
| Specification type | Our series | Series note |
|---|---|---|
| MIL-DTL-38999 Type | J599 Series III / J599WR / GJB599 | J599 Series III has 184 insert arrangements and triple-start threaded coupling; J599WR adds a cadmium-free nickel-PTFE finish; GJB599 covers Series I, II and IV types. |
| MIL-DTL-26482 Type | YB-I / YB-II | YB-I uses solder contacts and YB-II uses crimp contacts; YB-II L versions operate up to +200 °C. |
| MIL-C-83723 Type | ZH83723 | ZH83723 provides 65 dB RFI shielding at 100 MHz, with sealed versions operating up to +260 °C. |
| MIL-DTL-5015 Type | HMS31 / HMS31-K / HMS31-KY / VG31 | HMS31 uses threaded coupling and contacts up to 150 A; HMS31-K and HMS31-KY use reverse-bayonet coupling; VG31 uses VG 95234 with 5015 insert arrangements. |
| Micro-D 83513 Type | J30J | J30J uses gold-plated twist-pin contacts on a 1.27 mm grid, with 5 to 144 contacts. |
| GJB 2889 | XC | XC uses bayonet coupling and hyperboloid sockets, with 1–62 contacts carrying 5–40 A across 32 layouts. |

38999 Series III type · shell sizes 9–25 · 184 insert arrangements

26482 Series II type · crimp · mates with ZH8525

83723 type · 65 dB shielding · to +260 °C

MIL-DTL-5015 type · threaded · contacts up to 150 A

1.27 mm pitch · 5 to 144 contacts · twist-pin contacts

GJB 2889 bayonet · hyperboloid sockets · 1–62 contacts · 5–40 A
Shells, contacts and insulators are machined, molded and plated in-house in Shenyang, China.
Contact counts, cable lengths, materials and finishes can be customized, or we design a new connector for your equipment.
Samples are built to order for your own testing. Third-party testing is available on request.
We supply OEMs and distributors directly from the factory, with full specifications for every series online.


Part number, drawing, pin-out or a short description of your application.
Our engineers match the configuration and reply with a drawing and quotation.
Samples are built to order. Third-party testing to your specification is available on request.
You test the samples in your own equipment and approve them.
Production follows the approved sample configuration.
Send the part number or specification. We provide the corresponding configuration and samples for your verification; for D38999 part numbers, the 38999 page has a lookup to J599 Series III.
The minimum order quantity is 10 pcs. Samples take 4–8 weeks, and production orders take 4–8 weeks. Send your drawing or part number; we will acknowledge your inquiry by email within 1 business day.
Yes. Every series can be customized. We make shells, contacts and insulators in our own factory, so we can change a configuration or design a new connector for your equipment.
Yes. Samples are built to order so you can verify them before series production. Third-party testing is available on request.
We will come back with the matching configuration and a quotation.