D38999/24WA98PN Jam-Nut Receptacle, MIL-DTL-38999 Series III / GJB599 Series III

The D38999/24WA98PN 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 J599/24WA98PN designation used in GJB599 Series III supply chains.

This jam-nut receptacle features Class W olive drab cadmium finish, shell size A (shell size 9), insert arrangement A98 / 9-98 (6 contacts: 6 x #22D signal, Service Class I - non-sealed), 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 J599/24WA98PN
• 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 configuration with insert arrangement A98 / 9-98: 6 x #22D signal contacts (Service Class I - non-sealed)
• Normal keying (N) for standard polarization and anti-mismatch mating

Technical Specifications - D38999/24WA98PN

Part Number Breakdown

Related options: D38999/20WA98PN uses square flange mount (/20); D38999/24FA98PN uses electroless nickel finish (F); D38999/24KA98PN uses stainless Class K; socket contact version is D38999/24WA98SN; mating straight plug is D38999/26WA98SN; square flange receptacle version is D38999/20WA98PN. Same shell size also commonly uses arrangements A35 (13 x #22D sealed signal, Service Class M) and A02 (2 x #22D signal, Service Class I). Note: arrangement 98 is Service Class I (non-sealed) — for sealed applications use A35. There is no functional difference between D38999 and J599 prefixes for form-fit-function mating within the same Series III family.

Compatible Applications

The D38999/24WA98PN jam-nut receptacle is intended for platforms that require EMI-capable threaded interconnects with low-count non-sealed signal circuits in shell size A (9), 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 circular connectors
• Industrial systems that standardize on GJB599 / MIL-DTL-38999 Series III interfaces

Selection Guide

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 A98 / 9-98.
• Install the jam-nut receptacle panel mount in the designated cutout (shell size 9).
• 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 (socket), and normal keying (N). Note: A98 is Service Class I (non-sealed) — do not use in applications requiring environmental sealing.

Why Choose D38999/24WA98PN

Form-Fit-Function Compatibility

Choosing D38999/24WA98PN ensures form-fit-function compatibility with J599/24WA98PN 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 pin contacts and olive drab cadmium finish in shell size A (9) for aerospace and industrial systems.

Ordering Information

Order by the MIL-DTL-38999 designation D38999/24WA98PN, or cross-reference as J599/24WA98PN, depending on your procurement standard. When requesting a quote, please confirm mating plug part number (socket contacts), panel mount requirements, contact plating, and required quantity. Note: A98 is Service Class I (non-sealed); specify A35 for sealed applications.