Precision 1/4 inch male SAE to 5/16 inch female SAE adapter designed specifically for R410a mini split air conditioners, HVAC systems, and refrigeration service applications. Ideal for technicians and DIY users who need to connect standard 1/4 inch SAE gauge hoses to equipment with 5/16 inch SAE vacuum and charging ports, ensuring compatibility without additional tools. Lowloss fitting helps minimize refrigerant leakage during connection and disconnection, improving efficiency and safety during maintenance. Constructed from quality brass for sealing performance, longlasting durability, and reliable operation under demanding conditions. Strong tensile strength and corrosion resistance make this adapter dependable for outdoor and indoor service work. Compact and easy to handle, allowing quick installation in tight spaces without compromising performance. Practical uses: 1. Connecting a standard manifold gauge set to a R410a mini split during system charging or testing. 2. Performing vacuuming operations on HVAC systems with 5/16 inch SAE service ports using common 1/4 inch hoses. 3. Servicing refrigeration units that require crosscompatibility between different SAE fitting sizes. Dimensions and specifications: Male SAE size: 1/4 inch Female SAE size: 5/16 inch Material: Solid brass construction Compatible refrigerants: R410a and similar systems with matching port sizes Application: HVAC and refrigeration servicing, charging, vacuuming, and maintenance tasks