Square Flange Receptacle Mil-Dtl D38999 Series III Connector J59920wd35sn-H
| Application: | Aerospace | Contact Material: | Copper |
| Surface Treatment: | Cadmium Plating | Type of Contact: | Solder Socket |
| Orientation: | Normal | Trademark: | Donconn |
| HS Code: | 8536909000 |
J59920WD35SN-H Square Flange Wall Mount Receptacle, GJB599 Series III / D38999 Series III
The J59920WD35SN-H (standard form J599/20WD35SN-H) is a triple-start threaded circular electrical connector receptacle designed for aerospace, avionics, and industrial platforms. It conforms to GJB599 Series III / J599 requirements and is interchangeable with the D38999/20WD35SN-H designation used in MIL-DTL-38999 Series III supply chains.
This wall-mount square flange receptacle features Class W olive drab cadmium finish, shell size D (shell size 15), insert arrangement D35 / 15-35 (37 contacts), socket contacts (S), and normal keying (N). The trailing -H suffix denotes an optional durability / special-order marking; confirm with your supplier whether -H is required for the application or if the base part number J599/20WD35SN is acceptable.
Product Features
- Conformant to GJB599 Series III (equivalent to MIL-DTL-38999 Series III / D38999)
- Interchangeable with cross-reference part number D38999/20WD35SN-H (base: D38999/20WD35SN)
- Triple-start threaded self-locking coupling for high-vibration retention
- Square flange wall-mount receptacle for panel installation
- Class W olive drab cadmium shell finish for corrosion resistance
- Socket contact configuration (S) with insert arrangement D35 / 15-35: typically 37 x #22D contacts
- Normal keying (N) for standard polarization and anti-mismatch mating
- Optional -H durability / special suffix; order base P/N without -H when not specified
Technical Specifications - J59920WD35SN-H
| Parameter | Value |
|---|---|
| Part Number | J59920WD35SN-H (standard: J599/20WD35SN-H) |
| Base Part Number (without -H) | J599/20WD35SN |
| Equivalent Part Number | D38999/20WD35SN-H / D38999/20WD35SN |
| Series | GJB599 Series III / D38999 Series III |
| Connector Type | Square flange wall mount receptacle (J599/20 / D38999/20) |
| Coupling | Triple-start threaded, self-locking |
| Finish Class | W - Olive drab cadmium plating |
| Shell Size | D (numeric shell size 15) |
| Insert Arrangement | D35 / 15-35 (37 contacts: typically 37 x #22D) |
| Contact Gender | S - Socket contacts (crimp, removable) |
| Keying / Polarization | N - Normal |
| Suffix | -H - Optional durability / special-order marking (confirm with supplier) |
| Mounting | Square flange panel mount |
| Shielding | EMI shielded (conductive shell finish) |
| Operating Temperature | Approximately -65°C to +175°C (Class W cadmium) |
| Compatible Mating | J599/26WD35PN plug (or D38999/26WD35PN), shell size D, arrangement 35, pin contacts, keying N |
Part Number Breakdown
| Segment | Meaning |
|---|---|
| J599 | GJB599 Series III circular connector family (D38999 equivalent) |
| /20 (or 20) | Square flange wall mount receptacle |
| W | Olive drab cadmium finish (Class W) |
| D | Shell size D (shell size 15) |
| 35 | Insert arrangement 35 (D35 / 15-35) |
| S | Socket contacts |
| N | Normal keying position |
| -H | Optional durability / special suffix (confirm requirement vs. base P/N) |
Related options: J599/20FD35SN uses electroless nickel finish (F); pin versions use P contacts; jam-nut style is J599/24WD35SN; mating plug is typically J599/26WD35PN. Same shell size also commonly uses arrangements D5, D15, D18, D19, and D97. If your BOM lists J59920WD35SN without a slash, it is the same part as J599/20WD35SN. Order without -H unless the drawing or purchase order specifically requires the -H marking.
Compatible Applications
The J599/20WD35SN-H square flange receptacle is intended for platforms that require EMI-capable threaded interconnects with high-density #22D 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 GJB599 / D38999 Series III interfaces
Selection Guide
| Requirement | Recommended Choice |
|---|---|
| Square flange receptacle, size D / arrangement 35 / sockets / keying N / cadmium, with -H | J599/20WD35SN-H - this product |
| Same configuration without -H suffix | J599/20WD35SN / D38999/20WD35SN |
| Same receptacle with electroless nickel finish | J599/20FD35SN |
| Matching plug with pin contacts | J599/26WD35PN / D38999/26WD35PN |
| Pin contact receptacle (same shell / arrangement / finish) | J599/20WD35PN |
Installation Notes
- Verify shell size, insert arrangement, contact gender, finish class, keying, and whether -H is required before mating or ordering.
- Use the correct crimp tooling for #22D contacts specified by arrangement D35 / 15-35.
- 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 15.
Why Choose J599/20WD35SN-H
Form-Fit-Function Compatibility
Choosing J599/20WD35SN-H ensures form-fit-function compatibility with D38999/20WD35SN supply chains while meeting GJB599 Series III requirements. The square-flange threaded receptacle geometry supports secure mating, EMI continuity, and reliable high-density #22D interconnect in aerospace and industrial systems.
Ordering Information
Order by the GJB599 designation J599/20WD35SN-H (or compact J59920WD35SN-H), or cross-reference as D38999/20WD35SN-H, depending on your procurement standard. If -H is not required, order the base part number J599/20WD35SN. When requesting a quote, please confirm mating plug part number, contact plating, mounting panel cut-out, -H marking requirement, and required quantity.
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