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How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Tight-Seal Plastic Barbed Tube Fittings for Air and Water
Minimize leaks in your line—these fittings have a single barb that creates a smooth clamping surface for extra-tight connections. Fittings are nylon for excellent impact and abrasion resistance.
NPSM (National Pipe Straight Mechanical) male threads are compatible with NPSM and NPSH threads.
For technical drawings and 3-D models, click on a part number.
Through-Wall Straight Adapters, Tube × Male Threaded Pipe
- Temperature Range: -50° to 275° F
- Tubing: Use with firm (Durometer 75A-80A) polyurethane rubber or PVC plastic
- Clarity: Black: Opaque; White: Opaque; Off-White: Semi-Clear
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
| For Tube ID | Pipe Size  | Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Pkg. Qty. | Choose a Color | Pkg. | |
NPSM Threads | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 5/32" | 1/4 | Nylon Plastic | Not Rated | 1/2" | 23/64" | 10 | 0000000 | 000000 | |
| 3/16" | 1/4 | Nylon Plastic | Not Rated | 1/2" | 27/64" | 10 | 0000000 | 00000 | |
| 1/4" | 1/4 | Nylon Plastic | Not Rated | 1/2" | 31/64" | 10 | 0000000 | 00000 | |
| 5/16" | 1/4 | Nylon Plastic | Not Rated | 1/2" | 17/32" | 10 | 0000000 | 00000 | |
| 3/8" | 1/4 | Nylon Plastic | Not Rated | 1/2" | 1/2" | 10 | 0000000 | 00000 | |
| 1/2" | 1/4 | Nylon Plastic | Not Rated | 1/2" | 37/64" | 10 | 0000000 | 00000 | |