Pipe or Tube Couplings by available Material and Size

Pipe or Tube Couplings are in the group Pipe & Tube Fittings. In general, the difference between tubes and pipes is in how they are specified. Tubes are generally specified by their outside diameter, and pipes are usually specified by their inside diameter. Fittings are the connectors (Elbows, Crosses, Tees, etc.), that are used to join segments together or to interface with them.

Pipe or Tube Couplings available in the following materials.

• Pipe or Tube Couplings, Steel
• Pipe or Tube Couplings, Grade 9
• Pipe or Tube Couplings, 300 Stainless (A1,A2, 18-8,304,310 etc.)
• Pipe or Tube Couplings, 316, 317, A4 Stainless
• Pipe or Tube Couplings, Superalloy (Inconel, Hastelloy, Alloy 20)
• Pipe or Tube Couplings, Copper
• Pipe or Tube Couplings, Aluminum
• Pipe or Tube Couplings, Brass
• Pipe or Tube Couplings, Silicon Bronze
• Pipe or Tube Couplings, Iron
• Pipe or Tube Couplings, Nylon
• Pipe or Tube Couplings, Plastic




Pipe or Tube Couplings available in the following US/Imperial diameters.

• Pipe or Tube Couplings, #1
• Pipe or Tube Couplings, #2
• Pipe or Tube Couplings, #3
• Pipe or Tube Couplings, #4
• Pipe or Tube Couplings, #4-20
• Pipe or Tube Couplings, #5
• Pipe or Tube Couplings, #6
• Pipe or Tube Couplings, #6-18
• Pipe or Tube Couplings, #8
• Pipe or Tube Couplings, #8-16
• Pipe or Tube Couplings, #10
• Pipe or Tube Couplings, #12
• Pipe or Tube Couplings, #14
• Pipe or Tube Couplings, 1/8
• Pipe or Tube Couplings, 3/16
• Pipe or Tube Couplings, 1/4
• Pipe or Tube Couplings, 1/4-20
• Pipe or Tube Couplings, 5/16
• Pipe or Tube Couplings, 5/16-18
• Pipe or Tube Couplings, 3/8
• Pipe or Tube Couplings, 3/8-16
• Pipe or Tube Couplings, 7/16
• Pipe or Tube Couplings, 1/2
• Pipe or Tube Couplings, 1/2-20
• Pipe or Tube Couplings, 9/16
• Pipe or Tube Couplings, 9/16-18
• Pipe or Tube Couplings, 5/8
• Pipe or Tube Couplings, 3/4
• Pipe or Tube Couplings, 3/4-16
• Pipe or Tube Couplings, 7/8
• Pipe or Tube Couplings, 1
• Pipe or Tube Couplings, 1 1/4
• Pipe or Tube Couplings, 1 1/2
• Pipe or Tube Couplings, 1 3/4
• Pipe or Tube Couplings, 2
• Pipe or Tube Couplings, 2 1/2
• Pipe or Tube Couplings, 3
• Pipe or Tube Couplings, 4
• Pipe or Tube Couplings, 5
• Pipe or Tube Couplings, 6




Pipe or Tube Couplings available in the following Metric diameters.

• Pipe or Tube Couplings, M4
• Pipe or Tube Couplings, M6
• Pipe or Tube Couplings, M8
• Pipe or Tube Couplings, M10
• Pipe or Tube Couplings, M12
• Pipe or Tube Couplings, M14