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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Aluminum Low-Pressure Barbed Tube Fittings for Air and Water
- For Use With: Air, Lubricated Air, Water
- Temperature Range: -40° to 230° F
- Tubing: Use with hard (Durometer 75A-60D) EVA plastic, polyethylene plastic, polyurethane rubber or PVDF plastic
Made of aluminum, these fittings are lighter in weight than other metal barbed tube fittings and have good corrosion resistance. The barb grips onto tubing, providing a secure hold with no clamp required.
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 | Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/16" | Aluminum | 125 psi @ 72° F | 3/16" | 1/4" | 00000000 | 000000 |
| 1/8" | Aluminum | 125 psi @ 72° F | 1/4" | 5/16" | 00000000 | 00000 |
| 0.17" | Aluminum | 125 psi @ 72° F | 5/16" | 13/32" | 00000000 | 00000 |
| 1/4" | Aluminum | 125 psi @ 72° F | 3/8" | 13/32" | 00000000 | 00000 |
| 3/8" | Aluminum | 125 psi @ 72° F | 1/2" | 13/32" | 00000000 | 00000 |
| 1/2" | Aluminum | 125 psi @ 72° F | 3/4" | 53/64" | 00000000 | 00000 |
Brass Low-Pressure Barbed Tube Fittings for Air and Water
A brass body provides protection against corrosive environments. Fittings have barbs that grip onto tubing.
- Temperature Range: -65° to 75° F
- Tubing: Use with firm (Durometer 95A) polyurethane rubber
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.
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.
- 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 | |
Metal Barbed Hose Fittings for Air and Water
Slide the barbed end into rubber hose and secure with the appropriate clamp or crimp-on hose ferrule.
Brass fittings are softer than other metal fittings, so they’re easier to thread together. Plain brass fittings have good corrosion resistance.Stainless steel fittings have very good corrosion resistance. 303 stainless steel fittings won’t rust when exposed to water, making them good for areas that require frequent cleanings. Hose connectors are also known as hose menders and splicers. Use them to connect lengths of hose or to repair damaged hose.
Through-wall straight connectors are also known as bulkhead couplings and panel-mount couplings. They mount through your wall or panel to create an inlet or outlet.
- Maximum Pressure: 250 psi @ 72° F
- Maximum Vacuum: 27 in. of Hg @ 72° F
- Temperature Range: -30° to 200° F
- Attachment Type: Use Crimp-On Hose Ferrules, Worm-Drive Clamps or Band-and-Buckle Clamps
| For Hose ID | For Hole Dia. | For Max. Wall Thick. | Pkg. Qty. | Pkg. | |
Brass | |||||
|---|---|---|---|---|---|
| 1/8" | 5/32" | 3/16" | 1 | 00000000 | 000000 |
| 3/16" | 5/32" | 9/32" | 1 | 00000000 | 00000 |
| 1/4" | 3/8" | 9/32" | 1 | 00000000 | 00000 |
| 5/16" | 7/16" | 9/32" | 1 | 00000000 | 00000 |
| 3/8" | 1/2" | 9/32" | 1 | 00000000 | 00000 |
| 1/2" | 5/8" | 15/32" | 1 | 00000000 | 00000 |
| 5/8" | 3/4" | 9/16" | 1 | 00000000 | 00000 |
| 3/4" | 1" | 3/4" | 1 | 00000000 | 00000 |
| 1" | 1 1/4" | 3/4" | 1 | 00000000 | 00000 |
303 Stainless Steel | |||||
| 1/8" | 5/32" | 3/16" | 1 | 0000000 | 00000 |
| 3/16" | 5/32" | 9/32" | 1 | 00000000 | 00000 |
| 1/4" | 3/8" | 9/32" | 1 | 00000000 | 00000 |
| 5/16" | 7/16" | 9/32" | 1 | 00000000 | 00000 |
| 3/8" | 1/2" | 9/32" | 1 | 00000000 | 00000 |
| 1/2" | 5/8" | 15/32" | 1 | 00000000 | 00000 |
| 5/8" | 3/4" | 9/16" | 1 | 00000000 | 00000 |
| 3/4" | 1" | 3/4" | 1 | 00000000 | 000000 |
| 1" | 1 1/4" | 3/4" | 1 | 00000000 | 000000 |