Amphenol D38999/26fh10pn Premium Connector for Reliable Electrical Systems
D38999/26FH10PN Straight Plug, MIL-DTL-38999 Series III / GJB599 Series III
The D38999/26FH10PN is a triple-start threaded circular electrical connector plug designed for aerospace, avionics, and industrial platforms. It conforms to MIL-DTL-38999 Series III / D38999 requirements and is interchangeable with the J599/26FH10PN designation used in GJB599 Series III supply chains.
This straight plug features Class F electroless nickel finish, shell size H (shell size 23), insert arrangement H10 / 23-10 (10 contacts), pin contacts (P), and normal keying (N). The design supports EMI shielding, scoop-proof mating, self-locking threaded coupling, and removable crimp contacts.
Product Features
- Conformant to MIL-DTL-38999 Series III / D38999 (equivalent to GJB599 Series III / J599)
- Interchangeable with cross-reference part number J599/26FH10PN
- Triple-start threaded self-locking coupling for high-vibration retention
- Straight plug style for cable-end termination
- Class F electroless nickel shell finish for corrosion resistance and conductivity
- Pin contact configuration (P) with insert arrangement H10 / 23-10: typically 10 x #16 contacts
- Normal keying (N) for standard polarization and anti-mismatch mating
Technical Specifications - D38999/26FH10PN
| Parameter | Value |
|---|---|
| Part Number | D38999/26FH10PN |
| Equivalent Part Number | J599/26FH10PN |
| Series | MIL-DTL-38999 Series III / GJB599 Series III |
| Connector Type | Straight plug (D38999/26 / J599/26) |
| Coupling | Triple-start threaded, self-locking |
| Finish Class | F - Electroless nickel plating |
| Shell Size | H (numeric shell size 23) |
| Insert Arrangement | H10 / 23-10 (10 contacts: typically 10 x #16) |
| Contact Gender | P - Pin contacts (crimp, removable) |
| Keying / Polarization | N - Normal |
| Cable End Style | Straight plug (backshell / accessory attach as required) |
| Shielding | EMI shielded (conductive shell finish) |
| Operating Temperature | Approximately -65°C to +200°C (Class F) |
| Compatible Mating | D38999/20FH10SN or D38999/24FH10SN receptacle (or J599 equivalents), shell size H, arrangement 10, socket contacts, keying N |
Part Number Breakdown
| Segment | Meaning |
|---|---|
| D38999 | MIL-DTL-38999 Series III circular connector family (J599 / GJB599 equivalent) |
| /26 | Straight plug |
| F | Electroless nickel finish (Class F) |
| H | Shell size H (shell size 23) |
| 10 | Insert arrangement 10 (H10 / 23-10) |
| P | Pin contacts |
| N | Normal keying position |
Related options: D38999/26WH10PN uses olive drab cadmium finish (W); D38999/26KH10PN uses stainless Class K; socket versions use S contacts; mating square-flange receptacle is D38999/20FH10SN; jam-nut receptacle is D38999/24FH10SN. Same shell size also commonly uses arrangements H6, H8, H21, H32, H35, H53, and H55. Confirm contact layout from the Series III arrangement chart when specifying tooling. There is no functional difference between D38999 and J599 prefixes for form-fit-function mating within the same Series III family.
Compatible Applications
The D38999/26FH10PN straight plug is intended for platforms that require EMI-capable threaded interconnects with a mid-count #16 power / signal layout in shell size 23. Typical use cases include:
- Aircraft and helicopter wiring harness cable ends
- Avionics LRUs, radar, and communication equipment
- Ground vehicles and rugged electronic enclosures
- Shipboard and outdoor equipment requiring sealed circular connectors
- Industrial systems that standardize on D38999 / GJB599 Series III interfaces
Selection Guide
| Requirement | Recommended Choice |
|---|---|
| Straight plug, size H / arrangement 10 / pins / keying N / nickel | D38999/26FH10PN - this product |
| Same plug with cadmium olive drab finish | D38999/26WH10PN |
| Same plug with stainless Class K finish | D38999/26KH10PN |
| Matching square flange receptacle with socket contacts | D38999/20FH10SN / J599/20FH10SN |
| Matching jam-nut receptacle with socket contacts | D38999/24FH10SN / J599/24FH10SN |
| Same arrangement in larger shell size J (25) | D38999/26FJ10PN |
Installation Notes
- Verify shell size, insert arrangement, contact gender, finish class, and keying before mating.
- Use the correct crimp tooling for #16 contacts specified by arrangement H10 / 23-10; confirm layout from the arrangement chart.
- Select and install a compatible M85049 / GJB1784 backshell or strain relief for shell size 23.
- Fully engage the triple-start threaded coupling until the self-locking mechanism is seated.
- Mate only with Series III receptacles of the same shell size, arrangement, opposite contact gender, and matching keying.
Why Choose D38999/26FH10PN
Form-Fit-Function Compatibility
Choosing D38999/26FH10PN ensures form-fit-function compatibility with J599/26FH10PN supply chains while meeting MIL-DTL-38999 Series III requirements. The straight plug geometry supports secure mating, EMI continuity, and reliable #16 interconnect in aerospace and industrial systems.
Ordering Information
Order by the D38999 designation D38999/26FH10PN, or cross-reference as J599/26FH10PN, depending on your procurement standard. When requesting a quote, please confirm mating receptacle part number, backshell / accessory needs, contact plating, and required quantity.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.