Versatile D38999/20FF32snh Aviation Wire Connector for Heavy-Duty Use

D38999/20FF32SNH Square Flange Wall Mount Receptacle, D38999 Series III / GJB599 Series III

The D38999/20FF32SNH is a triple-start threaded circular electrical connector receptacle designed for aerospace, avionics, and industrial platforms. It conforms to MIL-DTL-38999 Series III / D38999 requirements and is interchangeable with equivalent GJB599 Series III designations such as J599/20FF32SNH.

This wall-mount square flange receptacle features Class F electroless nickel finish, shell size F (shell size 19), insert arrangement F32 / 19-32 (32 contacts), socket contacts (S), normal keying (N), and an H suffix used by some suppliers for extended-durability or special contact options. 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)
• Interchangeable with cross-reference part number J599/20FF32SNH
• Triple-start threaded self-locking coupling for high-vibration retention
• Square flange wall-mount receptacle for panel installation
• Class F electroless nickel shell finish for corrosion resistance and conductivity
• Socket contact configuration (S) with insert arrangement F32 / 19-32: typically 32 x #20 contacts
• Normal keying (N); H suffix may denote extended mating durability or supplier-specific contact option

Technical Specifications - D38999/20FF32SNH

Part Number Breakdown

Related options: D38999/20FF32SN is the common base designation without H; D38999/20WF32SN uses olive drab cadmium finish (W); pin versions use P contacts; jam-nut style is D38999/24FF32SN. If your drawing does not call out the H suffix, order D38999/20FF32SN. There is no functional difference between D38999 and J599 prefixes for form-fit-function mating within the same Series III family.

Compatible Applications

The D38999/20FF32SNH square flange receptacle is intended for platforms that require EMI-capable threaded interconnects with high-density #20 signal circuits. Typical use cases include:

• Aircraft and helicopter wiring harness panel interfaces
• 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 D38999 / GJB599 Series III interfaces

Selection Guide

Installation Notes

• Verify shell size, insert arrangement, contact gender, finish class, keying, and whether the H suffix is required before ordering.
• Use the correct crimp tooling for #20 contacts specified by arrangement F32 / 19-32.
• Mount the square flange securely to the panel and keep sealing surfaces clean.
• Fully engage the triple-start threaded coupling until the self-locking mechanism is seated.
• Select matching Series III plug and M85049 / GJB1784 accessories compatible with shell size 19.

Why Choose D38999/20FF32SNH

Form-Fit-Function Compatibility

Choosing D38999/20FF32SNH ensures form-fit-function compatibility with J599/20FF32SNH supply chains while meeting D38999 Series III requirements. The square-flange threaded receptacle geometry supports secure mating, EMI continuity, and reliable high-density #20 interconnect in aerospace and industrial systems.

Ordering Information

Order by the designation D38999/20FF32SNH, or cross-reference as J599/20FF32SNH, depending on your procurement standard. When requesting a quote, please confirm whether H is required, mating plug part number, contact plating, mounting panel cut-out, and required quantity.