MAXIMATOR couplings are female to female fittings that allow the joining of two different sizes and/or types of connections for a variety of size combinations. All couplings and adapters are made of 316 cold worked stainless steel material; other materials are available upon request. Glands and collars are included with each female tube connection.
Instructions
Find the first connection you want in the “A” column and the other connection in the “B” column. At the intersection of the two columns is the appropriate catalog number.
Female Connection “A”
Female Connection “B”
Tube Size (in.)
Connection Type
Maximum Pressure (psi)*
Female Medium Pressure 21,000 psi
1/4” 4MF
3/8” 6MF
9/16” 9MF
3/4” 12MF
1” 16MF
1/4
4MF
21,000
21F4M
21F4M6M
21F4M9M
21F4M12M
21F4M16M
3/8
6MF
21,000
21F6M
21F6M9M
21F6M12M
21F6M16M
9/16
9MF
21,000
21F9M
21F9M12M
21F9M16M
3/4
12MF
21,000
21F12M
21F12M16M
1
16MF
21,000
21F16M
* The pressure rating of any adapter is the value of the lowest rated connection in the fitting.
Male Connection “A”
Female Connection “B”
Tube Size (in.)
Connection Type
Maximum Pressure (psi)*
Female High Pressure 65,000 psi
Female Ultra-High Pressure 152,000 psi
1/4” 4HF
3/8” 6HF
9/16” 9HF
5/16” 5UF
1/4
4MF
21,000
21F4M4H
21F4M6H
21F4M9H
21F4M5U
3/8
6MF
21,000
21F6M4H
21F6M6H
21F6M9H
21F6M5U
9/16
9MF
21,000
21F9M4H
21F9M6H
21F9M9H
21F9M5U
3/4
12MF
21,000
21F12M4H
21F12M6H
21F12M9H
21F12M5U
1
16MF
21,000
21F16M4H
21F16M6H
21F16M9H
21F16M5U
1/4
4HF
65,000
65F4H
65F4H6H
65F4H9H
65F4H5U
3/8
6HF
65,000
65F6H
65F6H9H
65F6H5U
9/16
9HF
65,000
65F9H
65F9H5U
5/16
5UF
152,000
152F5U
Male Connection “A”
Female Connection “B”
Tube Size (in.)
Connection Type
Maximum Pressure (psi)*
Female Pipe 15,200 psi
1/8” FNPT
1/4” FNPT
3/8” FNPT
1/2” FNPT
3/4” FNPT
1” FNPT
1/4
4MF
21,000
15F4M2P
15F4M4P
15F4M6P
15F4M8P
15F4M12P
15F4M16P
3/8
6MF
21,000
15F6M2P
15F6M4P
15F6M6P
15F6M8P
15F6M12P
15F6M16P
9/16
9MF
21,000
15F9M2P
15F9M4P
15F9M6P
15F9M8P
15F9M12P
15F9M16P
3/4
12MF
21,000
15F12M2P
15F12M4P
15F12M6P
15F12M8P
15F12M12P
15F12M16P
1
16MF
21,000
15F16M2P
15F16M4P
15F16M6P
15F16M8P
15F16M12P
15F16M16P
1/4
4HF
65,000
15F4H2P
15F4H4P
15F4H6P
15F4H8P
15F4H12P
15F4H16P
3/8
6HF
65,000
15F6H2P
15F6H4P
15F6H6P
15F6H8P
15F6H12P
15F6H16P
9/16
9HF
65,000
15F9H2P
15F9H4P
15F9H6P
15F9H8P
15F9H12P
15F9H16P
5/16
5UF
152,000
15F5U2P
15F5U4P
15F5U6P
15F5U8P
15F5U12P
15F5U16P
* The pressure rating of any adapter is the value of the lowest rated connection in the fitting.