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31-318-RFX — Amphenol product photo
Amphenol

Amphenol RF 31-318-RFX BNC Jack, 50 Ohm, 4 GHz, Bulkhead

MPN31-318-RFX
Active

Amphenol RF BNC jack, female socket, 50 Ohm, 4 GHz, 500 V, panel mount bulkhead, crimp termination, gold center contact, 5-piece kit.

$7.6600Ref. price · indicative, final on quote
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MOQ1 pcs
  • New & original stockTraceable channels only — no mixed lots, no re-taped reels.
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Specifications

31-318-RFX Technical Specifications
ParameterValue
Mounting typePanel Mount
Connector typeJack, Female Socket
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Mounting featureBulkhead - Front Side Nut
Cable groupRG-174, 188, 188A, 316, LMR-100, M17/119-RG174
Operating temperature-65°C~165°C
Body materialBrass
Housing colorSilver
Dielectric materialPolyoxymethylene (POM) Acetal
Center contact materialPhosphor Bronze
PackageBulk
Includes5 pcs - 1 Connector, 1 Contact, 1 Ferrule, 1 Lockwasher, 1 Nut
Impedance50Ohm
Body finishNickel
Mating cycles500
Insertion loss0.2dB
Number of ports1
Shield terminationCrimp
Contact terminationCrimp
Center contact platingGold

Product details

The 31-318-RFX is part of the 31-318 series of RF coaxial connectors, built for RG-174, RG-316, and LMR-100 class cables.

The 4 GHz frequency maximum covers the full BNC band for most lab and field applications; above that, the connector's geometry introduces a standing-wave ratio that degrades signal integrity. The insertion loss is rated at 0.2 dB, typical for a well-terminated BNC at these frequencies.

This jack accepts RG-174, RG-188, RG-188A, RG-316, LMR-100, and M17/119-RG174 cables — all small-diameter coax with a nominal impedance of 50 Ohms. It does not accept RG-58 class cables (that is the 31-320-RFX variant). Both the shield and the center contact are crimp-terminated, which gives a consistent, repeatable termination for field installation.

Panel Mount and Kit Contents

The connector mounts in a bulkhead panel using the front-side nut — the lockwasher and nut are included in the kit. The bayonet lock provides a quick, positive mate with the matching BNC plug.

Frequently asked questions

What cables are compatible with 31-318-RFX?

The 31-318-RFX accepts RG-174, RG-188, RG-188A, RG-316, LMR-100, and M17/119-RG174 cables. It does not accept RG-58 class cables.

Does 31-318-RFX include mounting hardware?

Yes, the 5-piece kit includes the connector body, crimp contact, ferrule, lockwasher, and nut — all needed for a bulkhead panel mount.