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You are here: Home > Knowledge Center > MVAC Refrigerants Fitting Sizes & Label Colors

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.

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
RS-24 Refrig-erant Products 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
RS-24 Gold
R-420A Dark green (PMS #347)
* These refrigerants have not been marketed yet; therefore, label colors have not been developed.

Century Tool & Equipment
4013 S. Old Hwy 94
St. Peters MO 63304
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