Versatile D38999/20FF32snh Aviation Wire Connector for Heavy-Duty Use
D38999/20FF32SNH Square Flange Wall Mount Receptacle, D38999 Series III / GJB599 Series III
The D38999/20FF32SNH is a triple-start threaded circular electrical connector receptacle designed for aerospace, avionics, and industrial platforms. It conforms to MIL-DTL-38999 Series III / D38999 requirements and is interchangeable with equivalent GJB599 Series III designations such as J599/20FF32SNH.
This wall-mount square flange receptacle features Class F electroless nickel finish, shell size F (shell size 19), insert arrangement F32 / 19-32 (32 contacts), socket contacts (S), normal keying (N), and an H suffix used by some suppliers for extended-durability or special contact options. 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)
- Interchangeable with cross-reference part number J599/20FF32SNH
- Triple-start threaded self-locking coupling for high-vibration retention
- Square flange wall-mount receptacle for panel installation
- Class F electroless nickel shell finish for corrosion resistance and conductivity
- Socket contact configuration (S) with insert arrangement F32 / 19-32: typically 32 x #20 contacts
- Normal keying (N); H suffix may denote extended mating durability or supplier-specific contact option
Technical Specifications - D38999/20FF32SNH
| Parameter | Value |
|---|---|
| Part Number | D38999/20FF32SNH |
| Base Equivalent | D38999/20FF32SN |
| Equivalent Part Number | J599/20FF32SNH |
| Series | D38999 Series III / GJB599 Series III |
| Connector Type | Square flange wall mount receptacle (D38999/20) |
| Coupling | Triple-start threaded, self-locking |
| Finish Class | F - Electroless nickel plating |
| Shell Size | F (numeric shell size 19) |
| Insert Arrangement | F32 / 19-32 (32 contacts: typically 32 x #20) |
| Contact Gender | S - Socket contacts (crimp, removable) |
| Keying / Polarization | N - Normal |
| Suffix | H - Extended durability / special option (confirm with supplier) |
| Mounting | Square flange panel mount |
| Shielding | EMI shielded (conductive shell finish) |
| Operating Temperature | Approximately -65°C to +200°C (Class F) |
| Compatible Mating | D38999/26FF32PNH plug (or D38999/26FF32PN), shell size F, arrangement 32, pin contacts, keying N |
Part Number Breakdown
| Segment | Meaning |
|---|---|
| D38999 | Series III circular connector family (GJB599 Series III equivalent) |
| /20 | Square flange wall mount receptacle |
| F | Electroless nickel finish (Class F) |
| F | Shell size F (shell size 19) |
| 32 | Insert arrangement 32 (F32 / 19-32) |
| S | Socket contacts |
| N | Normal keying position |
| H | Optional suffix (extended durability / special contact option) |
Related options: D38999/20FF32SN is the common base designation without H; D38999/20WF32SN uses olive drab cadmium finish (W); pin versions use P contacts; jam-nut style is D38999/24FF32SN. If your drawing does not call out the H suffix, order D38999/20FF32SN. There is no functional difference between D38999 and J599 prefixes for form-fit-function mating within the same Series III family.
Compatible Applications
The D38999/20FF32SNH square flange receptacle is intended for platforms that require EMI-capable threaded interconnects with high-density #20 signal circuits. Typical use cases include:
- Aircraft and helicopter wiring harness panel interfaces
- 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 |
|---|---|
| Square flange receptacle, size F / arrangement 32 / sockets / keying N / nickel | D38999/20FF32SNH - this product |
| Same configuration without H suffix | D38999/20FF32SN |
| Matching plug with pin contacts | D38999/26FF32PN (or PNH if H option is required) |
| Jam-nut rear panel mounting | D38999/24FF32SN |
Installation Notes
- Verify shell size, insert arrangement, contact gender, finish class, keying, and whether the H suffix is required before ordering.
- Use the correct crimp tooling for #20 contacts specified by arrangement F32 / 19-32.
- Mount the square flange securely to the panel and keep sealing surfaces clean.
- Fully engage the triple-start threaded coupling until the self-locking mechanism is seated.
- Select matching Series III plug and M85049 / GJB1784 accessories compatible with shell size 19.
Why Choose D38999/20FF32SNH
Form-Fit-Function Compatibility
Choosing D38999/20FF32SNH ensures form-fit-function compatibility with J599/20FF32SNH supply chains while meeting D38999 Series III requirements. The square-flange threaded receptacle geometry supports secure mating, EMI continuity, and reliable high-density #20 interconnect in aerospace and industrial systems.
Ordering Information
Order by the designation D38999/20FF32SNH, or cross-reference as J599/20FF32SNH, depending on your procurement standard. When requesting a quote, please confirm whether H is required, mating plug part number, contact plating, mounting panel cut-out, and required quantity.
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