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A (mm)
Conventional flare tool
Clutch type Wing nut type
1/4 6.35 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0
3/8 9.52 0.8 0 to 0.5 1.0 to 1.5 1.5 to 2.0
1/2 12.70 0.8 0 to 0.5 1.0 to 1.5 2.0 to 2.5
5/8 15.88 1.0 0 to 0.5 1.0 to 1.5 2.0 to 2.5
Table 6-2-3 Dimensions related to flare processing for R410A
Nominal
diameter
Outer
diameter
(mm)
Thickness
(mm)
Flare tool for R410A
clutch type
A (mm)
Conventional flare tool
Clutch type Wing nut type
1/4 6.35 0.8 0 to 0.5 0.5 to 1.0 1.0 to 1.5
3/8 9.52 0.8 0 to 0.5 0.5 to 1.0 1.0 to 1.5
1/2 12.70 0.8 0 to 0.5 0.5 to 1.0 1.5 to 2.0
5/8 15.88 1.0 0 to 0.5 0.5 to 1.0 1.5 to 2.0
Table 6-2-4 Dimensions related to flare processing for R22
Nominal
diameter
Outer
diameter
(mm)
Thickness
(mm)
Flare tool for R22
clutch type
Dimension (mm)
ABCD
1/4 6.35 0.8 9.1 9.2 6.5 13 17
3/8 9.52 0.8 13.2 13.5 9.7 20 22
1/2 12.70 0.8 16.6 16.0 12.9 23 26
5/8 15.88 1.0 19.7 19.0 16.0 25 29
Table 6-2-5 Flare and flare nut dimensions for R410A
Nominal
diameter
Outer
diameter
(mm)
Thickness
(mm)
Flare nut
width
(mm)
Dimension (mm)
ABCD
1/4 6.35 0.8 9.0 9.2 6.5 13 17
3/8 9.52 0.8 13.0 13.5 9.7 20 22
1/2 12.70 0.8 16.2 16.0 12.9 20 24
5/8 15.88 1.0 19.4 19.0 16.0 23 27
3/4 19.05 1.0 23.3 24.0 19.2 34 36
Table 6-2-6 Flare and flare nut dimensions for R22
Nominal
diameter
Outer
diameter
(mm)
Flare nut
width
(mm)
Thickness
(mm)