D38999/20FJ35PN Circular MIL Spec Connector by Amphenol – Rugged Military-Grade Performance

The Circular MIL Spec Connector D38999/20FJ35PN by Amphenol is a high-performance, threaded coupling connector built for extreme environmental conditions. As part of the MIL-DTL-38999 Series III, this connector is trusted in aerospace, defense, and high-reliability industrial applications. With superior EMI shielding, secure mating, and a lightweight shell, it stands out as one of the most dependable Circular MIL Spec Connectors on the market.

In this blog, we’ll explore its specifications, key features, common applications, wiring overview, and how to download its datasheet or purchase it from Xon Electronics.

Technical Specifications of D38999/20FJ35PN

• Manufacturer: Amphenol Aerospace

• Part Number: D38999/20FJ35PN

• Category: Connectors, Circular Connectors, Circular MIL Spec Connectors

• Series: MIL-DTL-38999 Series III

• Shell Size & Style: Size 20, Jam Nut Receptacle

• Contact Configuration: 35-pin (Size 22D contacts)

• Shell Material: Aluminum Alloy

• Finish: Electroless Nickel Plated

• Coupling Mechanism: Threaded

• Mounting Style: Panel Mount (Jam Nut)

• Operating Temperature: -65°C to +200°C

• Environmental Sealing: Fully sealed with high resistance to moisture and vibration

• Compliance: MIL-DTL-38999 military standards

This connector provides rugged and reliable interconnection for mission-critical systems using Circular Connectors and high-density Connectors configurations.

Key Features of D38999/20FJ35PN

• MIL-Spec Performance – Fully compliant with MIL-DTL-38999 for military and aerospace use

• EMI/RFI Shielding – High-level shielding effectiveness for secure signal integrity

• Threaded Coupling – Secure, vibration-resistant locking mechanism

• Durable Construction – Lightweight aluminum alloy shell with nickel finish

• Versatile Design – Supports high-density wiring in compact installations

These features position the D38999/20FJ35PN among the most trusted Circular MIL Spec Connectors in critical Connectors applications.

Applications of D38999/20FJ35PN Circular Connector

This Circular MIL Spec Connector is engineered for use in demanding environments such as:

• Aerospace Navigation and Flight Control Systems

• Ground Combat and Tactical Vehicles

• Military Radio and Communication Systems

• Satellite and Space Launch Equipment

• Marine Avionics and Radar Equipment

• Rugged Industrial Robotics and Heavy Machinery

It is ideal for applications where compact, secure, and EMI-protected Circular Connectors are essential.

Wiring and Connection Overview

Typical wiring and integration setup for D38999/20FJ35PN:

• Panel Mounting: Secure jam nut mount on control panels or chassis

• Contact Insertion: 35 size 22D pins inserted into pre-defined cavity layout

• Backshell Attachment: Compatible with strain-relief backshells for cable shielding

• Coupling: Threaded mating with plug connector for vibration resistance

• Sealing: Environmental gaskets ensure moisture-proof performance

The connector ensures reliable performance in harsh conditions where Circular MIL Spec Connectors are deployed.

Use Case Scenario: Military Aircraft Avionics Interface

Scenario: An avionics contractor needed high-density, vibration-resistant connectors for electronic flight systems in military aircraft.

Problem: Previous connectors failed due to EMI interference and loose mating under vibration.

Solution: The D38999/20FJ35PN Circular MIL Spec Connector from Amphenol provided robust shielding, secure locking, and resistance to high temperatures and vibration.

Result: Improved flight control reliability, longer connector lifespan, and easier field servicing.

This showcases the real-world reliability of Circular Connectors in mission-critical aerospace systems.

Download Datasheet for D38999/20FJ35PN

Need pin configuration, shell specs, or mounting layout?

Download D38999/20FJ35PN Datasheet from Xon Electronics

This datasheet includes all necessary technical data for engineering with Circular MIL Spec Connectors.

Why Buy from Xon Electronics?

Xon Electronics is your reliable source for genuine Amphenol Connectors and military-grade Circular MIL Spec Connectors, offering:

• 100% Authentic Amphenol MIL-Spec Components
• Global Shipping – USA, India, Australia, Europe & more
• Bulk Order Support for OEMs and Military Contractors
• Technical Assistance for Product Selection
• Secure and Fast Online Ordering

Shop at www.xonelec.com to ensure quality and compliance in your Connectors inventory.

Conclusion

The D38999/20FJ35PN Circular MIL Spec Connector by Amphenol is a premium solution for high-reliability interconnects in aerospace, defense, and industrial systems. With threaded coupling, EMI shielding, and MIL-Spec compliance, it is engineered to withstand the harshest environments.

Now available at Xon Electronics—your trusted global source for Connectors, Circular Connectors, and Circular MIL Spec Connectors.

FAQs – D38999/20FJ35PN by Amphenol

Q1. What series does this connector belong to?
It’s part of the MIL-DTL-38999 Series III family.

Q2. How many contacts does it support?
It features 35 contact positions using size 22D pins.

Q3. What coupling type is used?
Threaded coupling for secure and vibration-resistant locking.

Q4. Is it environmentally sealed?
Yes, it includes full environmental sealing for rugged use.

Q5. Where can I buy this connector globally?
You can purchase it from www.xonelec.com with shipping to USA, India, Australia, Europe, and other regions.