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The USD PRODUCTS U1-10D-S is a steel threaded adapter designed to connect a 5/8-inch flare fitting to a 1/2-inch male iron pipe (MIP) thread, with an additional tapped 3/8-inch female iron pipe (FIP) port. This multi-connection geometry allows a technician to tie in a branch line or access port without adding extra inline fittings. Built from steel construction, the adapter is suited for use in gas and refrigerant line assemblies where a durable, leak-resistant mechanical joint is required. HVAC technicians and plumbers commonly use this type of fitting during equipment installation, service, or line extension work.
This adapter is appropriate for residential and light commercial applications where flare-to-MIP transitions are needed, such as gas appliance hookups, refrigerant line sets, or plumbing rough-in work. The tapped 3/8-inch FIP port adds versatility by allowing a secondary connection point at the same fitting body, reducing the need for additional tees or couplings in tight spaces. It is packaged in a carton quantity of 315 units, making it well suited for wholesale distribution, contractor stocking, or supply house inventory.
Designed as an OEM-style replacement or service fitting for residential and light commercial gas or refrigerant piping assemblies requiring a 5/8-inch flare to 1/2-inch MIP transition with a tapped 3/8-inch FIP port.
Installation should be performed by a licensed HVAC technician or plumber in accordance with applicable local codes, including IFGC and IPC requirements. Shut off the gas supply or recover refrigerant and depressurize the system completely before making or breaking any fittings. Apply appropriate thread sealant or flare preparation as required by the connection type — use sealant only on the pipe thread side, never on flare seats. Inspect flare seats and threads for damage before assembly to ensure a leak-free joint.
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