D38999/26FF35pn Straight Plug Amphenol Connector for Electronic Devices

D38999/26FF35PN Straight Plug, MIL-DTL-38999 Series III / GJB599 Series III

The D38999/26FF35PN is a triple-start threaded circular electrical connector plug designed for aerospace, avionics, and industrial platforms. It conforms to MIL-DTL-38999 Series III requirements and is interchangeable with the J599/26FF35PN designation used in GJB599 Series III supply chains.

This straight plug features Class F electroless nickel finish, shell size F (shell size 19), insert arrangement F35 / 19-35 (66 contacts), 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 J599/26FF35PN
• Triple-start threaded self-locking coupling for high-vibration retention
• Straight plug style for cable-end termination
• Class F electroless nickel shell finish for corrosion resistance and conductivity
• Pin contact configuration (P) with insert arrangement F35 / 19-35: typically 66 x #22D contacts
• Normal keying (N) for standard polarization and anti-mismatch mating

Technical Specifications - D38999/26FF35PN

Part Number Breakdown

Related options: D38999/26WF35PN uses olive drab cadmium finish (W); D38999/26KF35PN uses stainless Class K; socket versions use S contacts; mating square-flange receptacle is D38999/20FF35SN; jam-nut receptacle is D38999/24FF35SN. Same shell size also commonly uses arrangements F6, F8, F26, and F99. There is no functional difference between D38999 and J599 prefixes for form-fit-function mating within the same Series III family.

Compatible Applications

The D38999/26FF35PN straight plug is intended for platforms that require EMI-capable threaded interconnects with high-density #22D circuits in shell size 19. 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 MIL-DTL-38999 / GJB599 Series III interfaces

Selection Guide

Installation Notes

• Verify shell size, insert arrangement, contact gender, finish class, and keying before mating.
• Use the correct crimp tooling for #22D contacts specified by arrangement F35 / 19-35.
• Select and install a compatible M85049 / GJB1784 backshell or strain relief for shell size 19.
• 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 matching keying.

Why Choose D38999/26FF35PN

Form-Fit-Function Compatibility

Choosing D38999/26FF35PN ensures form-fit-function compatibility with J599/26FF35PN supply chains while meeting MIL-DTL-38999 Series III requirements. The straight plug geometry supports secure mating, EMI continuity, and reliable high-density #22D interconnect in aerospace and industrial systems.

Ordering Information

Order by the MIL-DTL-38999 designation D38999/26FF35PN, or cross-reference as J599/26FF35PN, depending on your procurement standard. When requesting a quote, please confirm mating receptacle part number, backshell / accessory needs, contact plating, and required quantity.