PL-259 plug to 3/8in (9.5mm) thread adaptor.
Size
53mm PL-259 Adaptor to 3/8in (9.5mm) thread socket,
useful for converting standard antenna mounts with SO-239 sockets for use with 9.5mm (3/8in) based antennas.
PL-3/8 CONVERTS SO239 TO 3/8 FITTING
for antennas with 3/8 stud base upto 1 meter long
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