1/4 turn 5/16 conversion head adapter all copper r410 reducer with valve core air conditioning refilling connector - AliExpress
CONVERTER SCREW: 5/16"-24 to 1/4"-20
Amazon.com: R410A Adapter 5/16 inches SAE Female to 1/4 inches SAE Male Flare for Air Conditioners HVAC, 2 Straight Adapter + 2 Angled Adapter : Automotive
Sufanic R410a Adapter 5/16 SAE F Quick Couplers To 1/4 SAE M Flare 5/16 SAE M To 1/4 SAE - Walmart.com
5/16"-1/4" 410A Adapter
Parker - Industrial Pipe Adapter: 3/4″ Female Thread, 1-5/16-12 Male Thread, Male Straight Thread O-Ring x Female NPTF - 72517931 - MSC Industrial Supply
200DD – 5/16 X 1/4 Inverted Flare X Male Connector – Couplings Company
Buy 1-5/16-12 Male JIC x 3/4" Female NPT Steel JIC Female Connector Hydraulic Adapter
JB Industries A31665 5/16" SAE Male x 1/4" SAE Female Brass Adapter - Amazon.com
Beta Tools 892/5 Adapter, 5/16" Hex Bit to 1/4" Square Drive - Pegasus Auto Racing Supplies
ADAPTER 1/4" FEMALE - 5/16" MALE sae
LTWFITTING 5/16 in. O.D. Comp x 1/4 in. FIP Brass Compression Adapter Fitting (5-Pack) HF665405 - The Home Depot
Amazon.com: R410A Adapter 5/16" SAE Female Quick Couplers to 1/4" SAE Male Flare, 2 PC 45 Degree Angled Charging Vacuum Adapter, Used for R410a with Thimble Mini Split System, HVAC and Refrigeration