Skip to main content
Amphenol 31-219-RFX — RF / Coaxial Connectors

31-219-RFX Amphenol RF BNC to BNC Adapter, 50 Ohm, 4 GHz

MPN31-219-RFX
Active

Amphenol RF BNC to BNC adapter, 31-219-RFX, straight, jack to jack, female to female, 50 Ohm impedance, 4 GHz max frequency, 500 mating cycles, gold-plated phosphor bronze center contacts, nickel-plated brass body, PTFE dielectric, free hanging in-line.

$6.9600Ref. 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 supplier — new & surplus connector stock· Listing updated Aug 2026

Specifications

31-219-RFX key specifications
ParameterValue
Adapter typeJack to Jack
MountingFree Hanging (In-Line)
Adapter seriesBNC to BNC
Fastening typeBayonet Lock, Bayonet Lock
Conversion typeSame Series
Frequency - max4 GHz
Operating temperature-65°C~165°C
Body materialBrass
Dielectric materialPolytetrafluoroethylene (PTFE)
Center contact materialPhosphor Bronze
StyleStraight
PackageBulk

All specifications

31-219-RFX additional specifications
ParameterValue
Impedance50Ohm
Body finishNickel
Center genderFemale to Female
Mating cycles500
Center contact platingGold
Convert to (Adapter end)BNC Jack, Female Socket
Convert from (Adapter end)BNC Jack, Female Socket

Product details

BNC Barrel Coupler for 50 Ohm Signal Paths

The Amphenol RF 31-219-RFX is a straight BNC-to-BNC adapter, joining two female BNC jacks back-to-back. It is a same-series barrel coupler — use it to extend a cable run, join two cables, or convert a male connector on a panel to a female bulkhead interface. The body is nickel-plated brass, the center contacts are gold-plated phosphor bronze, and the dielectric is PTFE.

Frequently asked questions

Is 31-219-RFX male or female?

The 31-219-RFX is a female-to-female adapter — both ends are BNC jacks with female center sockets. It joins two male BNC connectors or extends a cable run.

What is the impedance of 31-219-RFX?

The 31-219-RFX is a 50 Ohm adapter, standard for BNC video, telecom, and instrumentation signal paths.