Standard 3/8"-16 Female to 1/4"-20 Male Tripod Thread Reducer Screw Adapter
Precision made brass tripod mono-pod screw adapters Height inc thread: 20mm (0.79"). Antenna Adapter for Antennas. Item model number 1/4brass. Impedance 50 Ohm. Part number 1/4brass. Weight 18g (0.63oz).