They are commonly used to extend the video section of a BNC to BNC cable by converting a male BNC Jack back to a Female BNC Jack, simple to use, simply twist and insert\remove! High Quality CCTV Joiners are made using nickel plated copper, ensuring no loss of video quality.
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1pc BNC to DuPont Cable BNC Male / Female to 2.54mm DuPont Female 1/2 Test Extension Cable 0.1-10m
Aliexpress UK
BNC to BNC Female Coupler Connector Joiner (Select Drop Down). This adapter has female BNC jacks on both ends, can be used to connect two male ended CCTV cables, or as gender changers. BNC Female to FEMALE Coupler Adapter Connector.
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Q9 BNC Female 4Holes Flange Connector BNC Female Jack with 4 Holes Flange Panel Chassis Mount Coaxial Solder Brass Nickel Plated
Aliexpress UK
This connector is a female to female connector used to join two BNC Male CCTV Connectors / Cables. Nickel Plated Connector corrosion resistance. A: Yes, Yes. no front/decoy or switch and bait. we are 100% UK based.
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1pcs Connector Adapter SMA Female Jack to BNC Female Jack RF Coaxial Converter Straight New Nickel Plated
Aliexpress UK
They are commonly used to extend the video section of a BNC to BNC cable by converting a male BNC Jack back to a Female BNC Jack, simple to use, simply twist and insert\remove! SECURICAM High Quality CCTV Joiners are made using nickel plated copper, ensuring no loss of video quality.
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brass BNC Female to Twin 4mm Banana Jack Female Coaxial
Aliexpress UK
SMA male/female to BNC male/female Straight RF Coaxial connector Converter Adapter. SMA Screw Thread Type: English.
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BNC Male Female Jack to SMA Female Jack Straight RF Adapter BNCK SMAK Coaxial Connector High Quality for SDR CCTV Camera Scanner
Aliexpress UK
BNC FEMALE TO FEMALE COUPLER ADAPTER. BNC Socket to BNC Socket. BNC connectors used mainly with CCTV systems. Converts a BNC plug into a BNC socket.
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RG174 cable 3.5mm male female to Q9 BNC male female connector monitoring hard disk recorder to speaker audio cable
Aliexpress UK
BNC Female to SMA Male adaptor,s.
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Surveillance video BNC female to BNC male BNC male to RCA female Q9 male to rca female Q9 female to AV male adapter
Aliexpress UK
5 pcs of BNC to BNC Female Coupler Connector Joiner. This adapter has female BNC jacks on both ends, can be used to connect two male ended CCTV cables, or as gender changers. BNC Female to FEMALE Coupler Adapter Connector.
eBay
OULLX RJ45 Female to Female Port Network Ethernet LAN Splitter Connector Transfer Head RJ45 Adapter Coupler CAT5 CAT6 Socket
Aliexpress UK