Editing BNC connector (section)

==Similar connectors==
{{main|RF connector}}

Similar connectors using the [[bayonet connection]] principle exist, and a [[TNC connector|threaded connector]] is also available. United States military standard MIL-PRF-39012 entitled ''Connectors, Coaxial, Radio Frequency, General Specification for'' (formerly MIL-C-39012) covers the general requirements and tests for radio frequency connectors used with flexible cables and certain other types of coaxial transmission lines in military, aerospace, and spaceflight applications.<ref>[http://www.everyspec.com/MIL-PRF/MIL-PRF-030000-79999/MIL-PRF-39012E_28965/ MIL-PRF-39012]</ref>

===SR connectors===
{{Main|SR connector}}In the USSR, BNC connectors were copied as [[SR connector]]s. As a result of recalculating from imperial to metric measurements their dimensions differ slightly from those of BNC. They are however generally interchangeable with them, sometimes with force applied.

===TNC (Threaded Neill–Concelman)===
{{Main|TNC connector}}
A threaded version of the BNC connector, known as the [[TNC connector]] (for '''Threaded Neill-Concelman''') is also available. It has superior performance to the BNC connector at [[microwave]] frequencies.

===Twin BNC or twinax===
[[File:Twinax connectors.jpg|thumb|Female (left) and male (right) twin BNC connectors]] 
'''Twin BNC''' (also known as '''twinax''') connectors use the same bayonet latching shell as an ordinary BNC connector but contain two independent contact points (one male and one female), allowing the connection of a 78 ohm or 95 ohm shielded [[Differential signaling|differential pair]] such as RG-108A.<ref>{{cite web |author=E-Base Interactive |url=http://www.amphenolrf.com/products/twinbnc.asp |title=Twin BNC connector series |publisher=Amphenol RF |access-date=26 November 2011 |archive-date=23 July 2008 |archive-url=https://web.archive.org/web/20080723220858/http://www.amphenolrf.com/products/twinbnc.asp |url-status=dead }}</ref> They can operate up to 100&nbsp;MHz and 100&nbsp;volts. They cannot mate with ordinary BNC connectors. An abbreviation for twinax connectors has been BNO ({{interlanguage link|Huber+Suhner|de}}).

===Triaxial===
[[File:BNC triax.jpg|thumb|right|110px|Triaxial BNC connector]] [[Triaxial cable|Triaxial]] (also known as '''triax''') connectors are a variant on BNC that carry a signal and guard as well as ground conductor. These are used in sensitive electronic measurement systems. Early triaxial connectors were designed with just an extra inner conductor, but later triaxial connectors also include a three-lug arrangement to rule out an accidental forced mating with a BNC connector. Adaptors exist to allow some interconnection possibilities between triaxial and BNC connectors. The triaxial may also be known as a Trompeter connection.

===High-voltage connectors===
{{Main|MHV connector|SHV connector}}
For higher voltages (above 500&nbsp;V), [[MHV connector|MHV]] and [[SHV connector|SHV]] connectors are typically used. MHV connectors are easily mistaken for BNC type, and can be made to mate with them by brute force. The SHV connector was developed as a safer alternative: it will not mate with ordinary BNC connectors, and the inner conductor is much harder to accidentally contact.

===Miniature connectors===
[[File:Cross sections of BNC and HDBNC connectors.png|thumb|Section through BNC and HD-BNC connectors]]
BNC connectors are commonly used in electronics, but in some applications they are being replaced by [[LEMO]] 00 miniature connectors which allow for significantly higher densities. In video broadcast industry, the [[DIN 1.0/2.3]] and the HD-BNC connector are used for higher density products