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Amphenol 31-321 — RF / Coaxial Connectors

Amphenol RF 31-321 BNC Plug, 50 Ohm, 4 GHz, RG-59/62 Kit

MPN31-321
Active

Amphenol RF BNC plug, 31-321, 50 Ohm, 4 GHz, bayonet lock, crimp termination, for RG-59/62 cable groups, includes 4-piece kit.

$9.5500Ref. price · indicative, final on quote
Amphenol 31-321 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 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 materialBrass
Housing colorSilver
Dielectric materialPolytetrafluoroethylene (PTFE)
Center contact materialBrass
PackageBulk

All specifications

31-321 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, 50 Ohm, 4 GHz — Kit Includes All Termination Parts

The bayonet lock provides a quick, secure mate with any standard BNC jack, and the crimp shield termination keeps the assembly consistent across a run of cables.

The 50 Ohm impedance is a straight match for the listed cable groups — no impedance bump at the transition if you follow the manufacturer's crimp dimensions.

Field Termination Kit Contents

Each 31-321 unit includes four pieces: the BNC plug body, one crimp contact, one ferrule, and one PTFE insulator. The crimp contact and ferrule are sized for the RG-59/62 cable group — no separate die selection needed for the common types.

Frequently asked questions

Where can I buy Amphenol RF 31-321?

Submit a request for current pricing and availability — confirmed at quote time.

What cable groups does the 31-321 support?

It supports RG-59, RG-59B, RG-62, RG-140, RG-210, and Belden 8241, 8263, 8279, 9209 cables. The kit includes the contact, ferrule, and insulator sized for these groups.

Does the 31-321 come with all parts or just the connector?

It ships as a complete 4-piece kit: the BNC plug body, one crimp contact, one ferrule, and one PTFE insulator. No separate parts to order for a single termination.