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What is Included:
1/4" Male flare with Schrader valve x 5/16" also known as 1/2"-20 UNF Female.
This adapter is used on the R410a mini-split A/C systems that have the larger unique fitting on the service valve, the fitting is 5/16" also known as 1/2" ACME Male-20UN.
This adapter will screw onto the 5/16" also known as 1/2" ACME MALE-20 UN fitting and allow you to connect a standard 1/4 service hose to it.