Product details

RF Connectors / Coaxial Connectors BNC Straight Crimp Plug for RG-58, 50 Ohm

Name: 031-5557-RFX
SKU: 031-5557-RFX

China-sourced compatible alternative — fit confirmed by drawing/spec review.

Part number (MPN)

031-5557-RFX

Impedance

50 Ohms

Frequency

4 GHz

Need a custom version from drawing?

We coordinate supplier-qualified RF connector and cable assembly sourcing from drawings, samples, or BOM. Typical production lead time is 3–6 weeks after drawing/spec review; feasibility, MOQ, and fit are confirmed by RFQ.

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Lead time: 3–6 wks | MOQ: 200+ pcs

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• Share the reference MPN and source brand if it matters.
• Add the BOM and volume split for production projects.
• Attach the drawing or the key fit requirements.

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Specifications

031-5557-RFX

Specifications for 031-5557-RFX
Interface	RF Connectors / Coaxial Connectors
Interface	-
Interface	RG-58, RG-58C, RG-141, Belden 7806A, Belden 89907
Interface	BNC
Impedance	50 Ohms
Frequency (max)	-
Frequency (max)	4 GHz
Gender	Plug
Orientation	Straight
Termination	Cable - Crimp
Termination	Press Fit
Body Material	Brass

Show 16 more specs

Termination	Brass
Termination	Gold
Body Finish	Nickel
Part # Aliases	31-5557-RFX B1111K1-ND3G-58U-50
Coupling mechanism	Bayonet
Product	Connectors
Product Category	RF Connectors / Coaxial Connectors
Unit Weight	0.363322 oz
Maximum Operating Temperature	+ 165 C
Voltage Rating	500 V
Isolation	Non-Isolated
Mating Cycles	500
RoHS	N
Subcategory	RF Interconnects
Packaging	Bulk
Minimum Operating Temperature	- 65 C

Description

Current reference data for 031-5557-RFX: 50 Ohms · 4 GHz · Straight. The catalog currently lists the configuration as: Straight · Cable - Crimp. Impedance is listed as 50 Ohms. If that parameter is critical, confirm it again in RFQ. Frequency is listed as 4 GHz. The real operating limit still depends on the assembly, mating pair, and application context. If mounting is missing here, confirm it from the drawing or mating requirement. Material is listed as Brass. That is useful for review, but it does not replace full project stack-up confirmation. Use this page to shortlist before RFQ, not as the final sign-off.

Use this page to shortlist before RFQ. MOQ 200+ custom production and supply path are confirmed after drawing/spec/BOM review; no spot stock is assumed.

Request Quote (RFQ)

Cstone is a professional factory—not a trading company—specializing in RF and coaxial connectors, adapters, and cable assemblies, including N-type, BNC, SMA, SMP, SSMB, MMCX, and more. We manufacture custom connectors to 2D drawings or samples; fit, MOQ, lead time, and production details are confirmed by RFQ. Factory-made production to 2D drawings or samples; MOQ 200+ and typical 3–6 week lead time are confirmed after drawing/spec/BOM review. Physical inventory is not promised; production details are confirmed by RFQ.

Drawing / spec review MOQ / lead-time check RF connectors Adapters Cable assemblies

Why work with us?

Form-Fit-Function compatibility confirmed by drawing/spec review
Commercially competitive alternative for replacement and sourcing projects
MOQ 200+ and lead time confirmed by model, quantity, and supply path

Working hours: 10:00–20:00 (Beijing Time, UTC+8)

We typically reply within 1 business day (subject to workload and time zones).

Need a brand replacement workflow? Open the general brief → Need an approved alternative or cost-down workflow? Open the procurement brief →

Related RF sourcing routes

If this MPN is only a reference point, continue with a replacement, equivalent, adapter, or drawing-based cable assembly review.

Brand replacement briefs SMA alternatives from China BNC connector equivalents N Type RF replacement Custom RF cable from drawing

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Engineer checklist (key parameters)

Interface BNC

Gender Plug

Orientation Straight

Impedance 50 Ohms

Frequency (max) 4 GHz

Coupling mechanism Bayonet

Termination Cable - Crimp

Cable type RG-58, RG-58C, RG-141, Belden 7806A, Belden 89907

If these parameters are critical, include them in the RFQ.

FAQ

What is the impedance of 031-5557-RFX?

Our catalog lists the impedance for 031-5557-RFX as: 50 Ohms. If impedance is critical for your application, include the requirement in your RFQ and we will confirm.

What frequency is 031-5557-RFX rated for?

Our catalog lists the frequency for 031-5557-RFX as: 4 GHz. Actual performance depends on assembly/materials/application — send an RFQ so we can confirm a suitable option.

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MPN Search Supports exact, prefix, and partial matching. ⌄

Supports exact, prefix, and partial matching.

000-10400 000-1 00010400

Disclaimer

Manufacturer names, trademarks, symbols, and part numbers are used for identification and cross-reference only. Cstone Technology operates its own factory for RF/coaxial connectors, adapters, and cable assemblies and is not a trading company or affiliated with the original brands. Trademarks remain the property of their respective owners. Final suitability is confirmed by drawing/spec review during RFQ.