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.
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Maximum Female Connection Pressure (psi)

Female Connection Type A

Female Connection Type B

Item #

Female Connection Tube Size A

Female Connection Tube Size B

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21F4M N/A 1/4 in N/A 1/4 in

21F4M6M N/A 1/4 in N/A 3/8 in

21F6M N/A 3/8 in N/A 3/8 in

21F4M9M N/A 1/4 in N/A 9/16 in

21F6M9M N/A 3/8 in N/A 9/16 in

21F9M N/A 9/16 in N/A 9/16 in

21F4M12M N/A 1/4 in N/A 3/4 in

21F6M12M N/A 3/8 in N/A 3/4 in

21F9M12M N/A 9/16 in N/A 3/4 in

21F12M N/A 3/4 in N/A 3/4 in

21F4M16M N/A 1/4 in N/A 1 in

21F6M16M N/A 3/8 in N/A 1 in

21F9M16M N/A 9/16 in N/A 1 in

21F12M16M N/A 3/4 in N/A 1 in

21F16M N/A 1 in N/A 1 in

21F4M4H N/A 1/4 in N/A 1/4 in

21F6M4H N/A 3/8 in N/A 1/4 in

21F9M4H N/A 9/16 in N/A 1/4 in

21F12M4H N/A 3/4 in N/A 1/4 in

21F16M4H N/A 1 in N/A 1/4 in

65F4H N/A 1/4 in N/A 1/4 in

21F4M6H N/A 1/4 in N/A 3/8 in

21F6M6H N/A 3/8 in N/A 3/8 in

21F9M6H N/A 9/16 in N/A 3/8 in

21F12M6H N/A 3/4 in N/A 3/8 in

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