J599/26fe26pn Mil Spec Amphenol Circular Connector
J599/26FE26PN Straight Plug, GJB599 Series III / D38999 Series III
The J599/26FE26PN is a triple-start threaded circular electrical connector plug designed for aerospace, avionics, and industrial platforms. It conforms to GJB599 Series III / J599 requirements and is interchangeable with the D38999/26FE26PN designation used in MIL-DTL-38999 Series III supply chains.
This straight plug features Class F electroless nickel finish, shell size E (shell size 17), insert arrangement E26 / 17-26 (26 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 GJB599 Series III (equivalent to MIL-DTL-38999 Series III / D38999)
- Interchangeable with cross-reference part number D38999/26FE26PN
- 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 E26 / 17-26: typically 26 x #20 contacts
- Normal keying (N) for standard polarization and anti-mismatch mating
Technical Specifications - J599/26FE26PN
| Parameter | Value |
|---|---|
| Part Number | J599/26FE26PN |
| Equivalent Part Number | D38999/26FE26PN |
| Series | GJB599 Series III / D38999 Series III |
| Connector Type | Straight plug (J599/26 / D38999/26) |
| Coupling | Triple-start threaded, self-locking |
| Finish Class | F - Electroless nickel plating |
| Shell Size | E (numeric shell size 17) |
| Insert Arrangement | E26 / 17-26 (26 contacts: typically 26 x #20) |
| 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 | J599/20FE26SN or J599/24FE26SN receptacle (or D38999 equivalents), shell size E, arrangement 26, socket contacts, keying N |
Part Number Breakdown
| Segment | Meaning |
|---|---|
| J599 | GJB599 Series III circular connector family (D38999 equivalent) |
| /26 | Straight plug |
| F | Electroless nickel finish (Class F) |
| E | Shell size E (shell size 17) |
| 26 | Insert arrangement 26 (E26 / 17-26) |
| P | Pin contacts |
| N | Normal keying position |
Related options: J599/26WE26PN uses olive drab cadmium finish (W); J599/26KE26PN uses stainless Class K; socket versions use S contacts; mating square-flange receptacle is J599/20FE26SN; jam-nut receptacle is J599/24FE26SN. Same shell size also commonly uses arrangements E6, E8, E35, and E99. There is no functional difference between J599 and D38999 prefixes for form-fit-function mating within the same Series III family.
Compatible Applications
The J599/26FE26PN straight plug is intended for platforms that require EMI-capable threaded interconnects with mid-count #20 circuits in shell size 17. 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 GJB599 / D38999 Series III interfaces
Selection Guide
| Requirement | Recommended Choice |
|---|---|
| Straight plug, size E / arrangement 26 / pins / keying N / nickel | J599/26FE26PN - this product |
| Same plug with cadmium olive drab finish | J599/26WE26PN |
| Same plug with stainless Class K finish | J599/26KE26PN |
| Matching square flange receptacle with socket contacts | J599/20FE26SN / D38999/20FE26SN |
| Matching jam-nut receptacle with socket contacts | J599/24FE26SN / D38999/24FE26SN |
| Mixed #20 / #16 layout in shell size E | J599/26FE99PN |
| High-density #22D layout in shell size E | J599/26FE35PN |
Installation Notes
- Verify shell size, insert arrangement, contact gender, finish class, and keying before mating.
- Use the correct crimp tooling for #20 contacts specified by arrangement E26 / 17-26.
- Select and install a compatible M85049 / GJB1784 backshell or strain relief for shell size 17.
- 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 J599/26FE26PN
Form-Fit-Function Compatibility
Choosing J599/26FE26PN ensures form-fit-function compatibility with D38999/26FE26PN supply chains while meeting GJB599 Series III requirements. The straight plug geometry supports secure mating, EMI continuity, and reliable #20 interconnect in aerospace and industrial systems.
Ordering Information
Order by the GJB599 designation J599/26FE26PN, or cross-reference as D38999/26FE26PN, depending on your procurement standard. When requesting a quote, please confirm mating receptacle part number, backshell / accessory needs, contact plating, and required quantity.
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