The Ralston XTHA-2FSA 1/4" Female NPT x Female Quick-test XT Gauge Adapter connects a male NPT pressure gauge or other male NPT device to a hand pump or nitrogen calibration device, thereby adapting one side of a quick-disconnect to 10,000 psi. The adapter can be installed with thread tape once onto any male NPT pressure gauge; the Quick-test connection can then be used to quickly connect or disconnect from any hand pump, nitrogen calibration device or other Quick-test adapter. The adapter therefore saves the threads on a pressure gauge by not needing to make and remake the connection with thread sealant. Please note that the adapter is not compatible with QT or QS hoses - pease use Quick-test XT hoses.