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BNC to 10-32 adapters are shown below. This coaxial adapter offers a transition from the 10-32 typically used in down hole applications to the bnc which is common in test equipmnt. A BNC to 10-32 adapter is a common test lab accessory. 10-32 to BNC adapters are usually brass. 10-32 adapters were originally manufactured by a company called Microdot.