D38999/24wb02sn D38999 Series Jam Nut Receptacle Cable Connector
D38999/24WB02SN Jam-Nut Receptacle, MIL-DTL-38999 Series III / GJB599 Series III
The D38999/24WB02SN is a triple-start threaded circular electrical connector jam-nut receptacle designed for aerospace, avionics, and industrial platforms. It conforms to MIL-DTL-38999 Series III requirements and is interchangeable with the J599/24WB02SN designation used in GJB599 Series III supply chains.
This jam-nut receptacle features Class W olive drab cadmium finish, shell size B (shell size 11), insert arrangement B02 / 11-2 (2 contacts: 2 x #22D signal, Service Class I - non-sealed), socket contacts (S), 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 J599/24WB02SN
- Triple-start threaded self-locking coupling for high-vibration retention
- Jam-nut receptacle style for panel or bulkhead mounting
- Class W olive drab cadmium shell finish for corrosion resistance and conductivity
- Non-sealed signal-only configuration with insert arrangement B02 / 11-2: 2 x #22D signal contacts (Service Class I - non-sealed)
- Normal keying (N) for standard polarization and anti-mismatch mating
Technical Specifications - D38999/24WB02SN
| Parameter | Value |
|---|---|
| Part Number | D38999/24WB02SN |
| Equivalent Part Number | J599/24WB02SN |
| Series | GJB599 Series III / MIL-DTL-38999 Series III |
| Connector Type | Jam-nut receptacle (D38999/24 / J599/24) |
| Coupling | Triple-start threaded, self-locking |
| Finish Class | W - Olive drab cadmium plating |
| Shell Size | B (numeric shell size 11) |
| Insert Arrangement | B02 / 11-2 (2 contacts: 2 x #22D signal, Service Class I - non-sealed) |
| Contact Gender | S - Socket contacts (crimp, removable) |
| Keying / Polarization | N - Normal |
| Cable End Style | Jam-nut receptacle (panel / bulkhead mount, mating with plug) |
| Shielding | EMI shielded (conductive shell finish) |
| Operating Temperature | Approximately -65°C to +150°C (Class W) |
| Suffix Designation | None — keying N is the trailing segment |
| Compatible Mating | D38999/26WB02PN or D38999/20WB02PN plug (or J599 equivalents), shell size B, arrangement 02, pin contacts, keying N |
Part Number Breakdown
| Segment | Meaning |
|---|---|
| D38999 | MIL-DTL-38999 Series III circular connector family (J599 equivalent) |
| /24 | Jam-nut receptacle |
| W | Olive drab cadmium finish (Class W) |
| B | Shell size B (shell size 11) |
| 02 | Insert arrangement 02 (B02 / 11-2, 2 x #22D signal, Service Class I - non-sealed) |
| S | Socket contacts |
| N | Normal keying position |
Related options: D38999/20WB02SN uses square flange mount (/20); D38999/24FB02SN uses electroless nickel finish (F); D38999/24KB02SN uses stainless Class K; pin contact version is D38999/24WB02PN; mating straight plug is D38999/26WB02PN; square flange receptacle version is D38999/20WB02SN. Same shell size also commonly uses arrangements B35 (13 x #22D sealed signal, Service Class M) and B99 (7 x #22D signal). Note: arrangement 02 is Service Class I (non-sealed) — for sealed applications use B35. There is no functional difference between D38999 and J599 prefixes for form-fit-function mating within the same Series III family.
Compatible Applications
The D38999/24WB02SN jam-nut receptacle is intended for platforms that require EMI-capable threaded interconnects with low-count non-sealed signal circuits in shell size B (11), using olive drab cadmium finish. 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 / MIL-DTL-38999 Series III interfaces
Selection Guide
| Requirement | Recommended Choice |
|---|---|
| Jam-nut receptacle, size B / arrangement 02 / sockets / keying N / cadmium / non-sealed | D38999/24WB02SN - this product |
| Same receptacle with square flange mount (/20) | D38999/20WB02SN |
| Same receptacle with electroless nickel finish | D38999/24FB02SN |
| Same receptacle with stainless Class K finish | D38999/24KB02SN |
| Mating straight plug with pin contacts | D38999/26WB02PN / J599/26WB02PN |
| Pin contact version of this receptacle | D38999/24WB02PN |
| Sealed signal layout in shell size B (Service Class M) | D38999/24WB35SN |
Installation Notes
- Verify shell size, insert arrangement, contact gender, finish class, and normal keying (N) before mating.
- Use the correct crimp tooling for #22D signal contacts specified by arrangement B02 / 11-2.
- Install the jam-nut receptacle panel mount in the designated cutout (shell size 11).
- Fully engage the triple-start threaded coupling with the mating plug until the self-locking mechanism is seated.
- Mate only with Series III plugs of the same shell size, arrangement, opposite contact gender (pin), and normal keying (N). Note: B02 is Service Class I (non-sealed) — do not use in applications requiring environmental sealing.
Why Choose D38999/24WB02SN
Form-Fit-Function Compatibility
Choosing D38999/24WB02SN ensures form-fit-function compatibility with J599/24WB02SN supply chains while meeting MIL-DTL-38999 Series III requirements. The jam-nut receptacle geometry supports secure panel mounting, EMI continuity, and reliable low-count non-sealed signal interconnect with socket contacts and olive drab cadmium finish in shell size B (11) for aerospace and industrial systems.
Ordering Information
Order by the MIL-DTL-38999 designation D38999/24WB02SN, or cross-reference as J599/24WB02SN, depending on your procurement standard. When requesting a quote, please confirm mating plug part number (pin contacts), panel mount requirements, contact plating, and required quantity. Note: B02 is Service Class I (non-sealed); specify B35 for sealed applications.
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