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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 Moisture-Resistant Plastic Barbed Tube Fittings for Air and Water
- Temperature Range: -20° to 280° F
- Tubing: Use with firm or soft (Durometer 50A-90A) polyurethane rubber or PVC plastic
- Specifications Met: FDA Compliant 21 CFR 177.2470
Fittings have a single barb that creates a smooth clamping surface for extra-tight connections that minimize leaks. Made of acetal, they won’t absorb water and lose strength, even in high-humidity environments.
For technical drawings and 3-D models, click on a part number.
Straight Adapters, Tube × Male Threaded Pipe
| For Tube ID | Pipe Size  | Thread Size | Thread Pitch | Material | Color | Clarity | Max. Pressure | Pkg. Qty. | Each | |
NPT Threads | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/8" | 1/8 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 00000 |
| 3/16" | 1/16 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 0000 |
| 1/4" | 1/16 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 0000 |
| 1/4" | 1/8 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 1/4" | 1/4 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 3/8" | 1/4 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 3/8" | 3/8 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 1/2" | 3/8 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 1/2" | 1/2 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 3/4" | 3/4 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 1" | 1 | __ | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| Pkg. | ||||||||||
Metric Threads | ||||||||||
| 3mm | __ | M6 | 1 mm | Acetal Plastic | White | Semi-Clear | Not Rated | 10 | 00000000 | 00000 |
| Each | ||||||||||
UNF Threads | ||||||||||
| 1/16" | __ | 10-32 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 000 |
| 1/16" | __ | 1/4"-28 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 0000 |
| 3/32" | __ | 10-32 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 000 |
| 3/32" | __ | 1/4"-28 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 000 |
| 1/8" | __ | 10-32 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 000 |
| 1/8" | __ | 1/4"-28 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 0000 |
| 5/32" | __ | 10-32 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 000 |
| 5/32" | __ | 1/4"-28 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 0000 |
| 3/16" | __ | 1/4"-28 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 0000 |
Straight Connectors, Tube
| For Tube ID | Material | Color | Clarity | Max. Pressure | Pkg. Qty. | Each | |
| 1/16" | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 00000 |
| 3/32" | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 000 |
| 1/8" | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 5/32" | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 0000 |
| 3/16" | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 00000000 | 000 |
| 1/4" | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 3/8" | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 1/2" | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 3/4" | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| 1" | Acetal Plastic | White | Semi-Clear | Not Rated | __ | 0000000 | 0000 |
| Pkg. | |||||||
|---|---|---|---|---|---|---|---|
| 5mm | Acetal Plastic | White | Semi-Clear | Not Rated | 10 | 00000000 | 0000 |
| 6mm | Acetal Plastic | White | Semi-Clear | Not Rated | 5 | 00000000 | 00000 |
| 7mm | Acetal Plastic | White | Semi-Clear | Not Rated | 5 | 00000000 | 0000 |
| 10mm | Acetal Plastic | White | Semi-Clear | Not Rated | 5 | 00000000 | 00000 |
Straight Reducers, Tube
| For Tube ID (A) | For Tube ID (B) | Material | Color | Clarity | Max. Pressure | Each | |
| 1/8" | 1/16" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 00000 |
| 1/8" | 3/32" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 3/16" | 1/16" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 1/4" | 1/16" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 1/4" | 1/8" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/8" | 1/4" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/2" | 1/4" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 1/2" | 3/8" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 5/8" | 1/2" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 3/4" | 1/2" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1" | 1/2" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 1" | 3/4" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
90° Elbow Adapters, Tube × Male Threaded Pipe
| For Tube ID | Pipe Size | Thread Size | Material | Color | Clarity | Max. Pressure | Each | |
NPT Threads | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/16" | 1/8 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 00000 |
| 1/8" | 1/8 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/4" | 1/8 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/4" | 1/4 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/8" | 1/4 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/8" | 3/8 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/2" | 3/8 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/2" | 1/2 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/4" | 3/4 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1" | 1 | __ | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
UNF Threads | ||||||||
| 1/16" | __ | 10-32 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/8" | __ | 10-32 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/8" | __ | 1/4"-28 | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 3/16" | __ | 1/4"-28 | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
90° Elbow Connectors, Tube
| For Tube ID | Material | Color | Clarity | Max. Pressure | Each | |
| 1/16" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 00000 |
| 3/32" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 1/8" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 5/32" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 3/16" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 1/4" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/8" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/2" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/4" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
Inline Tee Adapters, Tube × Male Threaded Pipe
Inline tees are also known as branch tees.
| For Tube ID | Pipe Size | Material | Color | Clarity | Max. Pressure | Each | |
NPT Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/8" | 1/8 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 00000 |
| 1/4" | 1/8 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/4" | 1/4 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/8" | 1/4 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/8" | 3/8 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/2" | 3/8 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/2" | 1/2 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/4" | 3/4 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1" | 1 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
Tee Connectors, Tube
| For Tube ID | Material | Color | Clarity | Max. Pressure | Each | |
| 1/16" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 00000 |
| 3/32" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 1/8" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 5/32" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 3/16" | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
| 1/4" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/8" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1/2" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 3/4" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
| 1" | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
Moisture-Resistant Plastic Barbed Tube Fittings for Air and Water
- Temperature Range: -40° to 190° F
- Tubing: Use with firm or soft (Durometer 40A-80A) polyurethane rubber or PVC plastic
Made of acetal, these fittings won’t absorb water and lose strength, even in high-humidity environments. They have barbs that grip onto tubing.
For technical drawings and 3-D models, click on a part number.
Straight Connectors, Tube
| For Tube ID, mm | Material | Color | Clarity | Max. Pressure | Each | |
| 4 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 00000 |
| 5 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 000 |
| 6 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 8 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 10 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 12 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
90° Elbow Connectors, Tube
| For Tube ID, mm | Material | Color | Clarity | Max. Pressure | Each | |
| 3 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 00000 |
| 4 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 5 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 6 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 8 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 10 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 12 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
Tee Connectors, Tube
| For Tube ID, mm | Material | Color | Clarity | Max. Pressure | Each | |
| 3 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 00000 |
| 4 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 5 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 6 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 8 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 10 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
| 12 | Acetal Plastic | White | Semi-Clear | 145 psi @ 72° F | 0000000 | 0000 |
Plastic Barbed Tube Fittings for Air and Water
Fittings have barbs that grip onto tubing.
Nylon fittings have excellent impact and abrasion resistance.
For technical drawings and 3-D models, click on a part number.
Straight Adapters, Tube × Male Threaded Pipe
- Temperature Range: See table
- Tubing: Semi-Clear: Use with firm or soft (Durometer 45A-80A) polyurethane rubber or PVC plastic
Opaque: Use with firm or soft (Durometer 40A-80A) polyurethane rubber or PVC plastic
| For Tube ID | Pipe Size | Material | Color | Clarity | Max. Pressure | Temp. Range, °F | Pkg. Qty. | Pkg. | |
NPT Threads | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4mm | 1/4 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 00000 |
| 5mm | 1/4 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 0000 |
| 6mm | 1/8 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 0000 |
| 6mm | 1/4 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 0000 |
| 8mm | 1/4 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 0000 |
| 10mm | 1/4 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 0000 |
| 12mm | 3/8 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 0000 |
90° Elbow Adapters, Tube × Male Threaded Pipe
- Temperature Range: See table
- Tubing: Semi-Clear: Use with firm or soft (Durometer 45A-80A) polyurethane rubber or PVC plastic
Opaque: Use with firm or soft (Durometer 40A-80A) polyurethane rubber or PVC plastic
| For Tube ID | Pipe Size | Material | Color | Clarity | Max. Pressure | Temp. Range, °F | Pkg. Qty. | Pkg. | |
NPT Threads | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4mm | 1/4 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 00000 |
| 6mm | 1/8 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 0000 |
| 6mm | 1/4 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 0000 |
| 8mm | 1/4 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 0000 |
| 12mm | 3/8 | Nylon Plastic | Black | Opaque | 145 psi @ 72° F | -40° to 190° | 1 | 0000000 | 0000 |
Inline Tee Adapters, Tube × Male Threaded Pipe
- Temperature Range: See table
- Tubing: Semi-Clear: Use with firm or soft (Durometer 45A-80A) polyurethane rubber or PVC plastic
Opaque: Use with firm or soft (Durometer 40A-80A) polyurethane rubber or PVC plastic
Inline tees are also known as branch tees.