Reliable Amphenol Connector for Aviation Straight Plug D38999/26fb99pn
D38999/26FB99PN Straight Plug, MIL-DTL-38999 Series III / GJB599 Series III
The D38999/26FB99PN is a triple-start threaded circular electrical connector plug designed for aerospace, avionics, and industrial platforms. It conforms to MIL-DTL-38999 Series III requirements and is interchangeable with the J599/26FB99PN designation used in GJB599 Series III supply chains.
This straight plug features Class F electroless nickel finish, shell size B (shell size 11), insert arrangement B99 / 11-99 (7 contacts: 7 x #22D signal), 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 (equivalent to GJB599 Series III / J599)
- Interchangeable with cross-reference part number J599/26FB99PN
- 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
- Compact signal-only configuration (P) with insert arrangement B99 / 11-99: 7 x #22D signal contacts
- Normal keying (N) for standard polarization and anti-mismatch mating
Technical Specifications - D38999/26FB99PN
| Parameter | Value |
|---|---|
| Part Number | D38999/26FB99PN |
| Equivalent Part Number | J599/26FB99PN |
| 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 | B (numeric shell size 11) |
| Insert Arrangement | B99 / 11-99 (7 contacts: 7 x #22D signal) |
| 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 | D38999/20FB99SN or D38999/24FB99SN receptacle (or J599 equivalents), shell size B, arrangement 99, socket contacts, keying N |
Part Number Breakdown
| Segment | Meaning |
|---|---|
| D38999 | MIL-DTL-38999 Series III circular connector family (GJB599 / J599 equivalent) |
| /26 | Straight plug |
| F | Electroless nickel finish (Class F) |
| B | Shell size B (shell size 11) |
| 99 | Insert arrangement 99 (B99 / 11-99) |
| P | Pin contacts |
| N | Normal keying position |
Related options: D38999/26WB99PN uses olive drab cadmium finish (W); D38999/26KB99PN uses stainless Class K; socket versions use S contacts; mating square-flange receptacle is D38999/20FB99SN; jam-nut receptacle is D38999/24FB99SN. Same shell size also commonly uses arrangements B02, B05, B35, and B98. There is no functional difference between D38999 and J599 prefixes for form-fit-function mating within the same Series III family.
Compatible Applications
The D38999/26FB99PN straight plug is intended for platforms that require EMI-capable threaded interconnects with compact signal circuits in shell size 11. 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 MIL-DTL-38999 / GJB599 Series III interfaces
Selection Guide
| Requirement | Recommended Choice |
|---|---|
| Straight plug, size B / arrangement 99 / pins / keying N / nickel | D38999/26FB99PN - this product |
| Same plug with cadmium olive drab finish | D38999/26WB99PN |
| Same plug with stainless Class K finish | D38999/26KB99PN |
| Matching square flange receptacle with socket contacts | D38999/20FB99SN / J599/20FB99SN |
| Matching jam-nut receptacle with socket contacts | D38999/24FB99SN / J599/24FB99SN |
| Low-count signal layout in shell size B | D38999/26FB02PN |
| Higher-density signal layout in shell size B | D38999/26FB35PN |
Installation Notes
- Verify shell size, insert arrangement, contact gender, finish class, and keying before mating.
- Use the correct crimp tooling for #22D signal contacts specified by arrangement B99 / 11-99.
- Select and install a compatible M85049 / GJB1784 backshell or strain relief for shell size 11.
- 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 D38999/26FB99PN
Form-Fit-Function Compatibility
Choosing D38999/26FB99PN ensures form-fit-function compatibility with J599/26FB99PN supply chains while meeting MIL-DTL-38999 Series III requirements. The straight plug geometry supports secure mating, EMI continuity, and reliable compact signal interconnect in aerospace and industrial systems.
Ordering Information
Order by the MIL-DTL-38999 designation D38999/26FB99PN, or cross-reference as J599/26FB99PN, 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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