Skip to main content
Log in
Amphenol 031-5998-RFX — RF / Coaxial Connectors

031-5998-RFX BNC Plug Kit, 50 Ohm, 4 GHz, NRND

MPN031-5998-RFX
NRND

Amphenol RF BNC plug kit, 031-5998-RFX, 50 Ohm, 4 GHz, 500 mating cycles, crimp termination, Bayonet lock, includes connector + contact + ferrule.

$11.4100Ref. 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

031-5998-RFX key specifications
ParameterValue
MountingFree Hanging (In-Line)
Connector typePlug, Male Pin
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Cable groupBelden 9913, 9914, LMR-400
Operating temperature-65°C~165°C
Body materialBrass
Housing colorSilver
Dielectric materialPolytetrafluoroethylene (PTFE)
Center contact materialBrass
PackageBulk

All specifications

031-5998-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

BNC Plug Kit for RG-8 / LMR-400 Coax

The 031-5998-RFX: It comes as a three-piece assembly: the connector body, a gold-plated brass crimp contact, and a nickel-plated brass ferrule.

This plug is sized for Belden 9913, 9914, and LMR-400 cable groups. The center contact crimps onto the pin, and the shield termination crimps over the braid through the supplied ferrule.

Lifecycle: NRND — Plan the Cross

The 031-5998-RFX carries a Not Recommended for New Design (NRND) status. That means it is still available through existing stock and last-time-buy channels, but the manufacturer will not support it in new projects. No official replacement part number is listed by Amphenol RF, so any cross must match the BNC interface, 50-ohm impedance, 4 GHz bandwidth, and the same crimp-on cable group.

500 Mating Cycles in the Field

The nickel body finish resists corrosion in shop-floor or outdoor cabinet environments.

Frequently asked questions

Is the 031-5998-RFX obsolete or NRND?

The 031-5998-RFX is marked Not Recommended for New Design (NRND). It is not fully discontinued, but it is not intended for new project designs.

What cable does the 031-5998-RFX work with?

This BNC plug is designed for Belden 9913, 9914, and LMR-400 cable groups — RG-8-size coax with a solid or stranded center conductor.

What is the insertion loss of the 031-5998-RFX?

The specified insertion loss is 0.2 dB across the rated frequency range.