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Amphenol Aerospace

D38999 Coax Contacts

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Coax Size 12 & 16 Contact Performance:

  • Typical VSWR: 1.5:1 maximum up to 700 MHz and 500 MHz respectively, for properly cabled size 12 and 16 coaxial contacts in the M38999 Series I, II and III
  • Insulation Resistance: 5,000 megohms minimum @ 25° C
  • Dielectric Withstanding Voltage: Size 12: 1,000 VAC Rms @ sea level, 250 VAC Rms @ 50,000 ft. Size 16: 800 VAC Rms @ sea level, 250 VAC Rms @ 50,000 ft.
  • Contact Resistance: See MIL-C-39029/27, /28, /75 - 78
Coax Contacts are gold plated, crimp termination

The finish of mating contacts parts (supplied with 0.000050 min.) is gold over nickel. Other finishes are available; consult Amphenol for further information.


Amphenol® Coaxial contacts offer several advantages for reliable interconnection and continued performance:
  • Large crimping area assures low contact resistance and high tensile strength
  • Back insulator positively captivates inner contact against axial loads
  • Front insulator provides closed entry for socket inner contact
  • Recessed inner contact is protected
  • Outer contact has rugged wall section for durability


NEW 2010 - High Speed Contacts -Section of 12-C3

New "Split-Pair" Quadrax Contacts for MIL-DTL-38999, Series 111 - PDS-219

NEW 2010 - Printed Circuit Board - Section of 12-C3

Micro D-Twinax Transition Adapters-PDS-215

HF38999 High Frequency Contact - Catalog SL-400

Amphenol Press Fit Connectors for Printed Circuit Boards Applications

High Speed/High Frequency Contacts - Catalog 12-130

NEW 2010 Circular Interconnects Catalog - All sections - 12-C3


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