MVAC Refrigerants Fitting Sizes & Label Colors
These fittings and labels must be used with alternative
refrigerants when used in motor vehicle air conditioning
systems. For more details, see EPA's
fact sheet titled
"Choosing and Using Alternative Refrigerants for Motor
Vehicle Air Conditioning," available from the hotline and
on the web site.
This list includes all refrigerants found acceptable
subject to use conditions in motor vehicle air
conditioning as of December 18, 2000.
If your browser cannot display tables, please call our
Hotline at
800-296-1996 to receive a free copy of this fact
sheet in the mail or by fax. The title is
Fitting Sizes and Label Colors for Motor Vehicle
Refrigerants.
Fitting Sizes
Refrigerant |
Contact |
High Side Service Port |
Low Side Service Port |
30-lb. Cylinders |
Small Cans |
Diameter
(inches) |
Pitch
(threads/inch) |
Thread
Direction |
Diameter
(inches) |
Pitch
(threads/inch) |
Thread
Direction |
Diameter
(inches) |
Pitch
(threads/inch) |
Thread
Direction |
Diameter
(inches) |
Pitch
(threads/inch) |
Thread
Direction |
CFC-12
(post-1987) |
multiple |
6/16 |
24 |
Right |
7/16 |
20 |
Right |
7/16 |
20 |
Right |
7/16 |
20 |
Right |
CFC-12
(pre-1987) |
7/16 |
20 |
Right |
7/16 |
20 |
Right |
7/16 |
20 |
Right |
7/16 |
20 |
Right |
HFC-134a |
multiple |
quick-connect |
quick-connect |
8/16 |
16 Acme |
Right |
8/16 |
16 Acme |
Right |
Freeze 12 |
Technical
Chemical
800-527-0885 |
7/16 |
14 |
Left |
8/16 |
18 |
Right |
8/16 |
18 |
Right |
6/16 |
24 |
Right |
Free Zone /
RB-276 |
Refrigerant
Gases
888-373-3066 |
8/16 |
13 |
Right |
9/16 |
18 |
Right |
9/16 |
18 |
Right |
6/16 |
24 |
Left |
Hot Shot |
ICOR
800-357-4062 |
10/16 |
18 |
Left |
10/16 |
18 |
Right |
10/16 |
18 |
Right |
5/16 |
24 |
Right |
McCool
Chill-It |
McMullen Oil
Products, Inc.
800-669-5730 |
6/16 |
24 |
Left |
7/16 |
20 |
Left |
.368 |
26 |
Right |
14mm |
1.25mm
spacing |
Left |
GHG-X4 /
Autofrost |
People's Welding
800-382-9006 |
.305 |
32 |
Right |
.368 |
26 |
Right |
.368 |
26 |
Right |
14mm |
1.25mm
spacing |
Left |
GHG-X5 |
8/16 |
20 |
Left |
9/16 |
18 |
Left |
9/16 |
18 |
Left |
not sold in small cans |
R-406A |
.305 |
32 |
Left |
.368 |
26 |
Left |
.368 |
26 |
Left |
8/16 |
20 |
Left |
GHG-HP |
not yet developed* |
Ikon-12 / Ikon
A |
Ikon
505-345-2707 |
not yet developed* |
FRIGC
FR-12 |
Intercool
800-555-1442 |
quick-connect, different from HFC-134a |
quick-connect, different from HFC-134a |
8/16 |
20 |
Left |
7/16 |
20 |
Left |
SP34E |
Solpower
888-289-8866 |
7/16 |
14 |
Right |
8/16 |
18 |
Left |
8/16 |
18 |
Left |
5/16 |
24 |
Left |
R-426A (RS-24, new formulation) |
Refrigerant
Solutions Ltd |
Quick connect, different from HFC-134a and FRIGC
FR-12 |
Quick connect, different from HFC-134a and FRIGC
FR-12 |
Quick connect, different from HFC-134a and FRIGC
FR-12 |
Quick connect, different from HFC-134a and FRIGC
FR-12 |
R-420A |
RMS of
Georgia |
0.5625
(9/16) |
18 |
Right |
0.5625
(9/16) |
18 |
Left |
0.5625
(9/16) |
18 |
Left |
0.5625
(9/16) |
18 |
Right |
* These refrigerants have not been marketed
yet; therefore, fittings have not been
developed.
Label Colors
To comply with the conditions on the use of motor vehicle refrigerants, a detailed label must be applied that features a unique background color. This table summarizes the colors chosen for the refrigerants listed as of June 3, 1997. The information required for each label is listed in EPA's fact sheet titled "Choosing and Using Alternative Refrigerants for Motor Vehicle Air Conditioning," available from EPA's world wide web site and from the Stratospheric Ozone Hotline at 800-296-1996.
Refrigerant |
Background |
CFC-12 |
White |
HFC-134a |
Sky Blue |
Freeze 12 |
Yellow |
Free Zone /
RB-276 |
Light
Green |
Hot Shot |
Medium
Blue |
GHG-X4 |
Red |
R-406A |
Black |
GHG-X5 |
Orange |
GHG-HP |
not yet
developed* |
Ikon-12 / Ikon
A |
not yet
developed* |
FRIGC
FR-12 |
Grey |
SP34E |
Tan |
R-426A (RS-24, new formulation) |
Gold |
R-420A |
Dark green
(PMS #347) |
* These refrigerants have not been marketed
yet; therefore, label colors have not been
developed. |