Brass Air Conditioner Coupling — a forged brass male-to-female straight-flare adapter designed for robust HVAC and refrigeration connections.

With a secure, leak-tight seal and versatile thread compatibility, this fitting is ideal for connecting branch pipes and equipment across a range of systems.

Key specifications

• Material: Brass
• Max pressure: 229 PSI (1.6 MPa)
• Operating temperature: -20 to 120 °C
• Configuration: SAE sizes from 1/4" to 3/4" with UNF male-to-female straight-flare threads

Size options and threads

• 6.35 mm = SAE 1/4" (Fit Nut Thread 7/16"-20 UNF)
• 9.52 mm = SAE 3/8" (Fit Nut Thread 5/8"-18 UNF)
• 12.7 mm = SAE 1/2" (Fit Nut Thread 3/4"-16 UNF)
• 15.88 mm = SAE 5/8" (Fit Nut Thread 7/8"-14 UNF)
• 19.05 mm = SAE 3/4" (Fit Nut Thread 17/16" UNF)

Applications

• Air conditioning branch pipes
• Refrigeration equipment
• Ship piping
• Copper water pipes
• Medical oxygen pipes
• Etc.

Installation and compatibility

This adapter provides a straightforward male-to-female, straight-flare connection compatible with the listed UNF nut threads. Select the size that matches your line’s outer diameter and corresponding UNF thread for a secure fit.