Electrical Wire Connector Stainless Steel Plug J599/26kh55pn

J599/26KH55PN Straight Plug, GJB599 Series III / MIL-DTL-38999 Series III

The J599/26KH55PN 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 D38999/26KH55PN designation used in MIL-DTL-38999 Series III supply chains.

This straight plug features Class K stainless steel finish, shell size H (shell size 23), insert arrangement H55 / 23-55 (55 contacts: 55 x #22D signal, Service Class M - 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 GJB599 Series III (equivalent to MIL-DTL-38999 Series III / D38999)
• Interchangeable with cross-reference part number D38999/26KH55PN
• Triple-start threaded self-locking coupling for high-vibration retention
• Straight plug style for cable-end termination
• Class K stainless steel shell finish for corrosion resistance and conductivity
• Sealed signal-only configuration (P) with insert arrangement H55 / 23-55: 55 x #22D signal contacts (Service Class M - sealed)
• Normal keying (N) for standard polarization and anti-mismatch mating

Technical Specifications - J599/26KH55PN

Part Number Breakdown

Related options: J599/26FH55PN uses electroless nickel finish (F); J599/26WH55PN uses olive drab cadmium finish (W); socket contact version is J599/26KH55SN; mating square-flange receptacle is J599/20KH55SN; jam-nut receptacle is J599/24KH55SN. Same shell size also commonly uses arrangements H06 (low-count #12 power), H31 (39 x #22D signal), H37 (high-density signal), and H53 (high-density signal). Note: arrangement 55 is non-standard for shell 23 — 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 J599/26KH55PN straight plug is intended for platforms that require EMI-capable threaded interconnects with mid-count sealed signal circuits in shell size H (23), using stainless steel 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

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 H55 / 23-55.
• Select and install a compatible M85049 / GJB1784 backshell or strain relief for shell size 23.
• 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 J599/26KH55PN

Form-Fit-Function Compatibility

Choosing J599/26KH55PN ensures form-fit-function compatibility with D38999/26KH55PN supply chains while meeting GJB599 Series III requirements. The straight plug geometry supports secure mating, EMI continuity, and reliable mid-count sealed signal interconnect with stainless steel finish in shell size H (23) for aerospace and industrial systems.

Ordering Information

Order by the GJB599 designation J599/26KH55PN, or cross-reference as D38999/26KH55PN, depending on your procurement standard. When requesting a quote, please confirm mating receptacle part number, backshell / accessory needs, contact plating, arrangement 55 availability, and required quantity.