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31-242 — Amphenol product photo
Amphenol

31-242 BNC Plug, 50 Ohm, 4 GHz, RG-179 Cable Kit

MPN31-242
Active

Amphenol 31-242 BNC plug, male pin, 50 Ohm, 4 GHz, bayonet lock, free-hanging, crimp/solder termination, gold centre contact, kit includes 5 pieces.

$13.0700Ref. price · indicative, final on quote
31-242 datasheet
StockIn Stock (21)
Lead timeIn Stock wk
MOQ1 pcs
  • New & original stockTraceable channels only — no mixed lots, no re-taped reels.
  • Factory packaging where availableSealed reels, trays and bags; cut quantities always stated on the quote.
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Specifications

31-242 Technical Specifications
ParameterValue
Mounting typeFree Hanging (In-Line)
Connector typePlug, Male Pin
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Cable groupRG-179, 179A, 179B, 187, 187A, Belden 9221, M17/94-RG179
Operating temperature-65°C~165°C
Body materialBrass
Housing colorSilver
Dielectric materialPolytetrafluoroethylene (PTFE)
Center contact materialBrass
PackageBulk
Includes5 pcs - 1 Connector, 1 Contact, 1 Ferrule, 1 Insulator, 1 Sleeve
Impedance50Ohm
Body finishNickel
Mating cycles500
Insertion loss0.2dB
Number of ports1
Shield terminationCrimp
Contact terminationCrimp or Solder
Center contact platingGold

Product details

BNC Plug Kit for RG-179 and RG-187 Cables

The 31-242: This kit includes five pieces: one connector body, one centre contact, one ferrule, one insulator, and one sleeve — everything needed to terminate a cable in one order.

The cable group is specified for RG-179, 179A, 179B, 187, 187A, Belden 9221, and M17/94-RG179. That 75-Ohm-looking RG-179 is actually a 50-Ohm variant in this context; the 31-242 is built for 50 Ohm systems, not 75 Ohm video lines.

Termination and Assembly Notes

Shield termination is crimp; the centre contact can be crimped or soldered. The ferrule crimps over the cable braid, the insulator centres the pin, and the sleeve threads over the assembly. Rated voltage is 500 V, which is more than the signal levels on a typical 50 Ohm line — the limit is the cable, not the connector.

Frequently asked questions

What is the impedance of the 31-242?

The 31-242 is a 50 Ohm connector, confirmed by the specified impedance rating.

What parts are included in the 31-242 kit?

The kit includes 5 pieces: one connector body, one centre contact, one ferrule, one insulator, and one sleeve — everything needed to terminate one cable end.