71-418618-66S

Overview

The Amphenol Aerospace Operations part number 71-418618-66S is a circular MIL-spec connector plug. It features 66 positions with socket contacts. The shell size is 18, and the mounting style is cable installation. The contact termination method is crimp. This component complies with MIL-DTL-38999 standards. The voltage rating is 600 VAC and 850 VDC. The current ratings are 7.5 A and 13 A. The wire gauge range is 24 AWG to 20 AWG. The shell material is aluminum with nickel plating.

Feature Summary

• Bayonet coupling mechanism for secure connection
• Crimp termination for reliable electrical interface
• Aluminum alloy shell construction

Applications

• Avionics systems
• Aircraft power distribution
• Military instrumentation

Procurement Notes

Verify the specific series designation and environmental qualification against the official datasheet before procurement. Confirm that the crimp tooling matches the specified wire gauge range. Ensure compatibility with mating connectors regarding shell size and contact arrangement. Check for any updated compliance requirements relevant to the target application environment.

Selection Notes

Select this component when a high-density circular connector is required for cable-mounted applications. The 66-position capacity supports complex signal routing in avionics. The bayonet coupling offers rapid engagement compared to threaded alternatives. Verify that the aluminum shell provides sufficient shielding for the intended electromagnetic interference conditions.

Part Context

This part belongs to the MIL-DTL-38999 family of circular connectors. These connectors are widely used in aerospace and defense industries. The design ensures performance in harsh environments. The series provides standardized interfaces for interconnect systems. Compatibility with other manufacturers' parts within the same specification is a key feature.

Replacement Considerations

Equivalent parts from other manufacturers complying with MIL-DTL-38999 Series III may be considered. Verify dimensional interchangeability and contact arrangement. Ensure electrical ratings match or exceed original specifications. Cross-reference with official substitution lists for confirmed compatible replacements.