Buy from Amazon.com : https://www.amazon.com/gp/product/B01H2Y1ZEG?tag=thefithousewi-20

Generic UHF Female Nut to SO239 Female Jack Bulkhead with Nut Panel Mount Connector

Product Description :
UHF female to UHF female Adapter
Straight RF Coaxial Coax adapter
UHF SO239 SO-239 international standard
Each package include 1 PCS
1 YEAR warranty