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Amphenol 031-5558-RFX — RF / Coaxial Connectors

031-5558-RFX BNC Plug, 50 Ohm, 4 GHz, Crimp Termination

MPN031-5558-RFX
Active

BNC plug, male pin, 50 Ohm, 4 GHz, crimp termination, bayonet lock, free hanging, 1 port, 500 mating cycles, gold center contact, nickel body, -65°C~165°C

$3.9592Ref. price · indicative, final on quote
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

031-5558-RFX key specifications
ParameterValue
MountingFree Hanging (In-Line)
Connector typePlug, Male Pin
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Cable groupRG-6, 6A, 54, 143, 212, Belden 1152A, 89248, 9290
Operating temperature-65°C~165°C
Body materialBrass
Housing colorSilver
Dielectric materialPolyoxymethylene (POM) Acetal
Center contact materialBrass
PackageBulk

All specifications

031-5558-RFX additional specifications
ParameterValue
Includes3 pcs - 1 Connector, 1 Contact, 1 Ferrule
Impedance50Ohm
Body finishNickel
Mating cycles500
Insertion loss0.2dB
Number of ports1
Shield terminationCrimp
Contact terminationCrimp
Center contact platingGold

Product details

50 Ohm BNC Plug for RG-6 Coax — Crimp Termination, 4 GHz

The 031-5558-RFX terminates to RG-6, RG-54, RG-143, RG-212, Belden 1152A, 89248, and 9290 with a crimp-on shield and center contact — one order covers the connector body, contact, and ferrule as a 3-piece kit.

Cable Fit and Termination Reality

This plug fits RG-6, 6A, 54, 143, 212, Belden 1152A, 89248, and 9290 cables. Verify your cable jacket OD and dielectric diameter against the ferrule bore before ordering.

Frequently asked questions

What cable groups does 031-5558-RFX fit?

It fits RG-6, RG-6A, RG-54, RG-143, RG-212, Belden 1152A, 89248, and 9290 coaxial cables. The ferrule and center contact are sized for those specific cable dielectrics and jacket ODs.

What is the impedance of 031-5558-RFX?

The characteristic impedance is 50 Ohm, standard for BNC RF interconnects. The crimp termination and POM dielectric maintain that impedance through the connector body.