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031-5137 — Amphenol product photo
Amphenol

Amphenol RF 031-5137 BNC Plug, 50 Ohm, 4 GHz, Suretwist

MPN031-5137
Active

Amphenol RF Suretwist® BNC plug, 50 Ohm, 4 GHz, bayonet lock, twist-on shield, gold-plated brass centre contact, -65°C to 165°C, free-hanging.

$8.9799Ref. price · indicative, final on quote
StockContact for availability
MOQ1 pcs
  • New & original stockTraceable channels only — no mixed lots, no re-taped reels.
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Specifications

031-5137 Technical Specifications
ParameterValue
SeriesSuretwist®
Mounting typeFree Hanging (In-Line)
Connector typePlug, Male Pin
Fastening typeBayonet Lock
Voltage rating500 V
Frequency - max4 GHz
Cable groupRG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, 9907
Operating temperature-65°C~165°C
Body materialBrass
Housing colorSilver
Dielectric materialPolytetrafluoroethylene (PTFE)
Center contact materialBrass
PackageBulk
Impedance50Ohm
Body finishNickel
Mating cycles500
Insertion loss0.2dB
Number of ports1
Shield terminationTwist On
Contact terminationPush On
Center contact platingGold

Product details

The 031-5137: This plug accepts RG-58, 58A, 58B, 58C, 141, 303, LMR-195, and Belden B7806A and 9907 — the standard 50 Ohm flexible and semi-rigid coax sizes that share a common dielectric diameter. The contact termination is push-on (solder or crimp the centre pin to the conductor), and the shield is secured by the twist-on body. No special tooling beyond a centre-pin crimp tool and a cable prep knife is required for field installs.

Construction and Duty

The dielectric is PTFE, which gives the wide temperature range and stable RF performance.

Frequently asked questions

Is the 031-5137 BNC plug 50 or 75 Ohm?

50 Ohm — the impedance is listed as 50 Ohm, and the cable groups (RG-58, LMR-195, etc.) are all 50 Ohm coax types.