71-433338-21R

Overview

The Amphenol Aerospace Operations model 71-433338-21R is a circular MIL-spec connector plug designed for harsh environment applications. It complies with the MIL-DTL-38999 series standards, ensuring reliability under vibration and extreme temperatures. The unit features shell size 22 and utilizes a threaded mating style for secure connection. It contains 21 positions configured with socket contacts to interface with corresponding pin plugs. The contacts are gold-plated copper alloy, providing low contact resistance and corrosion resistance. The cable entry orientation is straight, facilitating straightforward routing in confined spaces.

Feature Summary

• Complies with MIL-DTL-38999 environmental and performance standards
• Features gold-plated copper alloy socket contacts for reliable signal transmission
• Utilizes a threaded coupling mechanism for secure mating retention
• Designed for straight cable installation within shell size 22

Applications

• Avionics systems requiring high-reliability interconnects
• Defense communication equipment operating in harsh environments
• Radar and sensor system signal distribution
• Unmanned aerial vehicle (UAV) control interfaces

Procurement Notes

Verify the specific MIL-DTL-38999 compliance level and contact plating thickness against project requirements before ordering. Confirm that the straight cable orientation matches the physical routing constraints of the assembly. Ensure compatibility with the corresponding mating plug housing and backshell components to maintain environmental sealing integrity during operation.

Selection Notes

Select this component when a MIL-DTL-38999 compliant circular connector is required for shielded cable termination. The 21-position count suits complex signal or mixed-signal applications. Choose the gold-plated variant for superior conductivity and corrosion resistance in corrosive atmospheres. Verify that the straight cable entry angle aligns with the available space and bending radius limits of the wiring harness.

Part Context

This part belongs to the extensive Amphenol Circular Connectors portfolio, specifically the Series III line based on MIL-DTL-38999. These connectors are engineered for high-density applications where space is limited but performance must remain robust. The series supports various shell sizes and contact arrangements, allowing engineers to standardize on a single connector family across multiple platform designs while meeting stringent military specifications.

Replacement Considerations

Cross-reference with other manufacturers' MIL-DTL-38999 Series III plugs in shell size 22 with 21 positions. Verify dimensional interchangeability of the mounting flange and coupling threads. Ensure that the replacement part maintains the same contact type (socket) and plating material to guarantee electrical continuity and environmental performance.