Reducing Flare Union

*The working assumption for the chart below is that the temperature is 73°F with copper tubing

Tube OD 1/8" 3/16" 1/4" 5/16" 3/8" 1/2" 5/8" 3/4" 7/8"
Working Pressure
(PSI)		 2800 1900 1400 1200 1000 750 650 550 450
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Reducing Union 45deg Flare Diagram

5/16" Tube O.D. (1/2-20 Thread) x 1/4" Tube O.D. (7/16-20 Thread) Reducing Flare Union SAE 45 Degree Flare Brass
Price $5.24
Reducing Union 45deg Flare Diagram

3/8" Tube O.D. (5/8-18 Thread) x 1/4" Tube O.D. (7/16-20 Thread) Reducing Flare Union SAE 45 Degree Flare Brass
Price $4.13
Reducing Union 45deg Flare Diagram

3/8" Tube O.D. (5/8-18 Thread) x 5/16" Tube O.D. (1/2-20 Thread) Reducing Flare Union SAE 45 Degree Flare Brass
Price $7.32
Reducing Union 45deg Flare Diagram

1/2" Tube O.D. (3/4-16 Thread) x 1/4" Tube O.D. (7/16-20 Thread) Reducing Flare Union SAE 45 Degree Flare Brass
Price $6.30
Reducing Union 45deg Flare Diagram

1/2" Tube O.D. (3/4-16 Thread) x 3/8" Tube O.D. (5/8-18 Thread) Reducing Flare Union SAE 45 Degree Flare Brass
Price $6.28
Description N/A 5/16" Tube O.D. (1/2-20 Thread) x 1/4" Tube O.D. (7/16-20 Thread) Reducing Flare Union SAE 45 Degree Flare Brass N/A 3/8" Tube O.D. (5/8-18 Thread) x 1/4" Tube O.D. (7/16-20 Thread) Reducing Flare Union SAE 45 Degree Flare Brass N/A 3/8" Tube O.D. (5/8-18 Thread) x 5/16" Tube O.D. (1/2-20 Thread) Reducing Flare Union SAE 45 Degree Flare Brass N/A 1/2" Tube O.D. (3/4-16 Thread) x 1/4" Tube O.D. (7/16-20 Thread) Reducing Flare Union SAE 45 Degree Flare Brass N/A 1/2" Tube O.D. (3/4-16 Thread) x 3/8" Tube O.D. (5/8-18 Thread) Reducing Flare Union SAE 45 Degree Flare Brass
Tube O.D. N/A 5/16" x 1/4" N/A 3/8" x 1/4" N/A 3/8" x 5/16" N/A 1/2" x 1/4" N/A 1/2" x 3/8"
Thread Size N/A 1/2-20 x 7/16-20 N/A 5/8-18 x 7/16-20 N/A 5/8-18 x 1/2-20 N/A 3/4-16 x 7/16-20 N/A 3/4-16 x 5/8-18
A N/A 1.28 N/A 1.38 N/A 1.44 N/A 1.53 N/A 1.69
Hex N/A 0.50 N/A 0.62 N/A 0.62 N/A 0.75 N/A 0.75