D38999/26fb98pn Amphenol Spec Straight Plug Circular Connector

D38999/26FB98PN Straight Plug, MIL-DTL-38999 Series III / GJB599 Series III

The D38999/26FB98PN 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 J599/26FB98PN designation used in GJB599 Series III supply chains.

This straight plug features Class F electroless nickel finish, shell size B (shell size 11), insert arrangement B98 / 11-98 (6 contacts: 6 x #22D signal), 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 J599/26FB98PN
• 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
• Compact signal-only configuration (P) with insert arrangement B98 / 11-98: 6 x #22D signal contacts
• Normal keying (N) for standard polarization and anti-mismatch mating

Technical Specifications - D38999/26FB98PN

Part Number Breakdown

Related options: D38999/26WB98PN uses olive drab cadmium finish (W); D38999/26KB98PN uses stainless Class K; socket versions use S contacts; mating square-flange receptacle is D38999/20FB98SN; jam-nut receptacle is D38999/24FB98SN. Same shell size also commonly uses arrangements B02, B05, B35, and B99. There is no functional difference between D38999 and J599 prefixes for form-fit-function mating within the same Series III family.

Compatible Applications

The D38999/26FB98PN straight plug is intended for platforms that require EMI-capable threaded interconnects with compact signal circuits in shell size 11. 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 signal contacts specified by arrangement B98 / 11-98.
• Select and install a compatible M85049 / GJB1784 backshell or strain relief for shell size 11.
• 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 D38999/26FB98PN

Form-Fit-Function Compatibility

Choosing D38999/26FB98PN ensures form-fit-function compatibility with J599/26FB98PN supply chains while meeting MIL-DTL-38999 Series III requirements. The straight plug geometry supports secure mating, EMI continuity, and reliable compact signal interconnect in aerospace and industrial systems.

Ordering Information

Order by the MIL-DTL-38999 designation D38999/26FB98PN, or cross-reference as J599/26FB98PN, depending on your procurement standard. When requesting a quote, please confirm mating receptacle part number, backshell / accessory needs, contact plating, and required quantity.