Identifying Unique Fittings
UNIQUE FITTING TYPESCFC-12 (pre-87)
High Side Service Port
Diameter 3/8 in.
Pitch 24 threads per inch
Thread direction right
Low Side Service Port
Diameter 7/16 in.
Pitch 20 threads per inch
Thread direction right
CFC-12 (post-87)
High Side Service Port
Diameter 7/16 in.
Pitch 20 threads per inch
Thread direction right
Low Side Service Port
Diameter 7/16 in.
Pitch 20 threads per inch
Thread direction right
FREEZE 12
High Side Service Port
Diameter 7/16 in.
Pitch 14 threads per inch
Thread direction left
Low Side Service Port
Diameter 1/2 in
Pitch 18 threads per inch
Thread direction right
Free Zone, RB-276
High Side Service Port
Diameter 1/2 in.
Pitch 13 threads per inch
Thread direction right
Low Side Service Port
Diameter 9/16 in.
Pitch 18 threads per inch
Thread direction right
Hot Shot
High Side Service Port
Diameter 5/8 in.
Pitch 18 threads per inch
Thread direction left
Low Side Service Port
Diameter 5/8 in.
Pitch 18 threads per inch
Thread direction right
GHG-X4
High Side Service Port
Diameter 0.305 in.
Pitch 32 threads per inch
Thread direction right
Low Side Service Port
Diameter 0.368 in.
Pitch 26 threads per inch
Thread direction right
R-406a
High Side Service Port
Diameter 0.305 in.
Pitch 32 threads per inch
Thread direction left
Low Side Service Port
Diameter 0.368 in.
Pitch 26 threads per inch
Thread direction left
HFC-134a Quick-connect fitting
FRIGC, FR-12 Quick-connect fitting (different from HFC-134a)