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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 Choosing and Using Alternative Refrigerants for Motor Vehicle Air Conditioning.

This list includes all refrigerants found acceptable subject to use conditions in motor vehicle air conditioning as of March 29, 2011.

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
HFO-1234yf Honeywell Quick connect as in SAE J 639 (2011); different from HFC-134a, FRIGC FR-12, and R-426A Quick connect as in SAE J 639 (2011); different from HFC-134a, FRIGC FR-12, and R-426A Quick connect consistent with SAE J 2844 (2011); different from HFC-134a, FRIGC FR-12, and R-426A Not yet developed; additional information to be submitted to EPA.
* 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 Choosing and Using Alternative Refrigerants for Motor Vehicle Air Conditioning.

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.

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