Mil-Dtl D38999 Series III J599/26wj61sn 61pin Female Connector

J599/26WJ61SN Straight Plug, GJB599 Series III / MIL-DTL-38999 Series III

The J599/26WJ61SN is a triple-start threaded circular electrical connector plug designed for aerospace, avionics, and industrial platforms. It conforms to GJB599 Series III requirements and is interchangeable with the D38999/26WJ61SN designation used in MIL-DTL-38999 Series III supply chains.

This straight plug features Class W olive drab cadmium finish, shell size J (shell size 25), insert arrangement J61 / 25-61 (61 contacts: 61 x #22D signal, Service Class M - 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 GJB599 Series III (equivalent to MIL-DTL-38999 Series III / D38999)
• Interchangeable with cross-reference part number D38999/26WJ61SN
• Triple-start threaded self-locking coupling for high-vibration retention
• Straight plug style for cable-end termination
• Class W olive drab cadmium shell finish for corrosion resistance and conductivity
• Sealed signal-only configuration (S) with insert arrangement J61 / 25-61: 61 x #22D signal contacts (Service Class M - sealed)
• Normal keying (N) for standard polarization and anti-mismatch mating

Technical Specifications - J599/26WJ61SN

Part Number Breakdown

Related options: J599/26FJ61SN uses electroless nickel finish (F); J599/26KJ61SN uses stainless Class K; pin contact version is J599/26WJ61PN; mating square-flange receptacle is J599/20WJ61PN; jam-nut receptacle is J599/24WJ61PN. Same shell size also commonly uses arrangements J19 (19 x #22D sealed signal), J53 (53 x #22D high-density signal), and J07 (7 x #22D low-count signal). Note: arrangement 61 is non-standard for shell 25 — confirm availability and contact count with supplier. There is no functional difference between J599 and D38999 prefixes for form-fit-function mating within the same Series III family.

Compatible Applications

The J599/26WJ61SN straight plug is intended for platforms that require EMI-capable threaded interconnects with high-count sealed signal circuits in shell size J (25). 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

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 J61 / 25-61.
• Select and install a compatible M85049 / GJB1784 backshell or strain relief for shell size 25.
• 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 normal keying (N).

Why Choose J599/26WJ61SN

Form-Fit-Function Compatibility

Choosing J599/26WJ61SN ensures form-fit-function compatibility with D38999/26WJ61SN supply chains while meeting GJB599 Series III requirements. The straight plug geometry supports secure mating, EMI continuity, and reliable high-count sealed signal interconnect with olive drab cadmium finish in the largest shell size (J / 25) for aerospace and industrial systems.

Ordering Information

Order by the GJB599 designation J599/26WJ61SN, or cross-reference as D38999/26WJ61SN, depending on your procurement standard. When requesting a quote, please confirm mating receptacle part number, backshell / accessory needs, contact plating, arrangement 61 availability, and required quantity.