1pc Brass R410a Adapter Connectors 1/4" Male To 5/16" Sae Female Charging Hose To Vacuum Pump For Air Conditioners Mayitr - Pneumatic Parts - AliExpress
Parker - Barbed Hose Fitting: 1/4" x 5/16" ID Hose, Female Connector - 01045707 - MSC Industrial Supply
1/4" NPT Male To 5/16" Inverted Flare Female Adapter Fitting - BF54 - Affordable Street Rods
Amazon.com: Beduan Brass Hose Barb Reducer, 5/16" to 1/4" Barb Hose ID, Reducing Barb Brabed Fitting Splicer Mender Union Air Water Fuel : Industrial & Scientific
1/4 NPT to 5/16 (8mm) Hose Barb Fitting, Brass - Straight | Pegasus Auto Racing Supplies
1/4 in x 5/16 in Fitting Size, Male x Male, Hydraulic Hose Adapter - 4HM25|J5-4CBO - Grainger
Midland Metal Manufacturing Hose Adapter, 1/4 x 5/16 in, Push-On Hose Barb x Female Inverted Flare, 0.62 in Hex, 1.18 in L, 150 psi, Brass - 269604 - Northern Safety Co., Inc.