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Amphenol 31-321-RFX — RF / Coaxial Connectors

31-321-RFX BNC Plug, 50 Ohm, 4 GHz, 500 Cycles

MPN31-321-RFX
Active

Amphenol RF 31-321-RFX BNC plug, male pin, 50 Ohm, 4 GHz, 500 mating cycles, crimp termination, free-hanging, nickel body, includes connector + contact + ferrule + insulator.

$4.3400Ref. price · indicative, final on quote
Amphenol 31-321-RFX datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for stock & sourcing questions
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Jul 2026

Specifications

31-321-RFX key specifications
ParameterValue
MountingFree Hanging (In-Line)
Connector typePlug, Male Pin
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Cable groupRG-59, 59B, 62, 140, 210, Belden 8241, 8263, 8279, 9209
Operating temperature-65°C~165°C
Body materialZinc Die Cast
Housing colorSilver
Dielectric materialPolyoxymethylene (POM) Acetal
Center contact materialBrass
PackageBulk

All specifications

31-321-RFX additional specifications
ParameterValue
Includes4 pcs - 1 Connector, 1 Contact, 1 Ferrule, 1 Insulator
Impedance50Ohm
Body finishNickel
Mating cycles500
Insertion loss0.2dB
Number of ports1
Shield terminationCrimp
Contact terminationCrimp
Center contact platingGold

Product details

BNC Plug for RG-59/62/140/210 — 50 Ohm, 4 GHz

The 31-321-RFX: The kit includes 4 pieces: 1 connector body, 1 contact, 1 ferrule, and 1 insulator — everything needed for a single termination. The dielectric is polyoxymethylene (POM) acetal.

This plug terminates RG-59, RG-59B, RG-62, RG-140, RG-210, and Belden 8241, 8263, 8279, 9209 cables. The bayonet lock provides quick connect/disconnect with positive retention.

Rated for 4 GHz maximum frequency at 50 Ohm impedance with 0.2 dB insertion loss. The 500 mating cycles suit field-service and test-equipment applications where repeated connect/disconnect is expected. The voltage rating is 500 V.

Frequently asked questions

Which cables are compatible with 31-321-RFX?

This BNC plug terminates RG-59, RG-59B, RG-62, RG-140, RG-210, and Belden 8241, 8263, 8279, 9209 cables.