Filter by
DFARS Compliance
Thread Type
Pipe Size
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.
More
Compression Fittings for Steel Tubing
BSPP and UN/UNF
(SAE Straight) Male
Threads with Gasket
(SAE Straight) Male
Threads with Gasket
- For Use With: Inch: Air, Hydraulic Fluid, Water
Metric: Hydraulic Fluid - Tubing: Inch: Use with welded steel
Metric: Use with seamless steel - Specifications Met: Inch: SAE J514
Metric: ISO 8434, DIN 2353
A single sleeve (ferrule) bites into tubing as you tighten the nut, creating a strong seal. The nut and sleeve are included. Fittings are also known as flareless and bite fittings.
Zinc-plated steel fittings have fair corrosion resistance.
ISO 8434 (formerly DIN 2353) fittings meet international standards for tube fitting pressures.
For technical drawings and 3-D models, click on a part number.
Straight Adapters, Tube × Male Threaded Pipe
BSPP and UN/UNF
(SAE Straight) Male
Threads with Gasket
(SAE Straight) Male
Threads with Gasket
- Temperature Range: See table
For Tube | ||||||||
|---|---|---|---|---|---|---|---|---|
| OD | Pipe Size  | Thread Size | Material | Gasket Material | Max. Pressure | Temp. Range, °F | Each | |
NPT Threads | ||||||||
| 6mm | 1/4 | __ | Zinc-Plated Steel | __ | 4,500 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
| 10mm | 3/8 | __ | Zinc-Plated Steel | __ | 4,500 psi @ 72° F | -75° to 750° | 00000000 | 0000 |
| 12mm | 1/4 | __ | Zinc-Plated Steel | __ | 4,500 psi @ 72° F | -75° to 750° | 00000000 | 0000 |
| 12mm | 1/2 | __ | Zinc-Plated Steel | __ | 4,500 psi @ 72° F | -75° to 750° | 00000000 | 0000 |
| 15mm | 3/8 | __ | Zinc-Plated Steel | __ | 4,500 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
| 18mm | 1/2 | __ | Zinc-Plated Steel | __ | 4,500 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
| 22mm | 3/4 | __ | Zinc-Plated Steel | __ | 2,300 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
| 28mm | 1 | __ | Zinc-Plated Steel | __ | 2,300 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
| 35mm | 1 1/4 | __ | Zinc-Plated Steel | __ | 2,300 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
BSPP Threads | ||||||||
| 6mm | 1/4 | __ | Zinc-Plated Steel | Buna-N Rubber | 7,200 psi @ 72° F | -20° to 212° | 00000000 | 0000 |
| 8mm | 1/8 | __ | Zinc-Plated Steel | Buna-N Rubber | 7,200 psi @ 72° F | -20° to 212° | 00000000 | 0000 |
| 10mm | 1/8 | __ | Zinc-Plated Steel | Buna-N Rubber | 7,200 psi @ 72° F | -20° to 212° | 00000000 | 00000 |
| 10mm | 3/8 | __ | Zinc-Plated Steel | Buna-N Rubber | 7,200 psi @ 72° F | -20° to 212° | 00000000 | 0000 |
| 10mm | 1/2 | __ | Zinc-Plated Steel | Buna-N Rubber | 7,200 psi @ 72° F | -20° to 212° | 00000000 | 00000 |
| 12mm | 1/4 | __ | Zinc-Plated Steel | Buna-N Rubber | 5,800 psi @ 72° F | -20° to 212° | 00000000 | 0000 |
| 12mm | 1/2 | __ | Zinc-Plated Steel | Buna-N Rubber | 5,800 psi @ 72° F | -20° to 212° | 00000000 | 00000 |
| 28mm | 3/4 | __ | Zinc-Plated Steel | Buna-N Rubber | 3,600 psi @ 72° F | -20° to 212° | 00000000 | 00000 |
BSPT Threads | ||||||||
| 6mm | 1/4 | __ | Zinc-Plated Steel | __ | 3,600 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
| 8mm | 3/8 | __ | Zinc-Plated Steel | __ | 3,600 psi @ 72° F | -75° to 750° | 00000000 | 0000 |
| 10mm | 3/8 | __ | Zinc-Plated Steel | __ | 3,600 psi @ 72° F | -75° to 750° | 00000000 | 0000 |
UN/UNF (SAE Straight) Threads | ||||||||
| 6mm | __ | 9/16"-18 | Zinc-Plated Steel | Buna-N Rubber | 7,200 psi @ 72° F | -20° to 212° | 00000000 | 00000 |
Straight Connectors, Tube
- Temperature Range: See table
For Tube | ||||||
|---|---|---|---|---|---|---|
| OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | Each | |
| 1/8" | 0.028" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 000000 |
| 3/16" | 0.028" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 1/4" | 0.035" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 5/16" | 0.035" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 00000 |
| 3/8" | 0.035" | Zinc-Plated Steel | 3,000 psi @ 72° F | -65° to 400° | 000000000 | 00000 |
| 1/2" | 0.049" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 00000 |
| 5/8" | 0.058" | Zinc-Plated Steel | 1,000 psi @ 72° F | -65° to 400° | 000000000 | 00000 |
| 3/4" | 0.065" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 00000 |
| 1" | 0.065" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 00000 |
| 4mm | Not Rated | Zinc-Plated Steel | 1,400 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 6mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 8mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 10mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 12mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 00000 |
| 15mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 00000 |
| 18mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 00000 |
| 22mm | Not Rated | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 230° | 00000000 | 00000 |
| 28mm | Not Rated | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 230° | 00000000 | 00000 |
Through-Wall Straight Connectors, Tube
- Temperature Range: See table
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 | ||||||||
|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/4" | 0.035" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 7/16" | 3/8" | 000000000 | 000000 |
| 3/8" | 0.035" | Zinc-Plated Steel | 3,000 psi @ 72° F | -65° to 400° | 9/16" | 13/32" | 000000000 | 0000 |
| 1/2" | 0.049" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 3/4" | 13/32" | 000000000 | 00000 |
| 3/4" | 0.065" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 1 1/16" | 7/16" | 000000000 | 00000 |
| 6mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 13mm | 23mm | 00000000 | 00000 |
| 8mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 15mm | 24mm | 00000000 | 00000 |
| 10mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 17mm | 24mm | 00000000 | 00000 |
| 12mm | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 19mm | 25mm | 00000000 | 00000 |
Straight Connectors (Swivels Until Tightened), Tube
- Temperature Range: See table
Fittings that swivel until tightened rotate 360° for easy installation.
For Tube | |||||||
|---|---|---|---|---|---|---|---|
| OD, mm | Material | Gasket Material | Max. Pressure | Temp. Range, °F | Nut Material | Each | |
| 8 | Zinc-Plated Steel | Buna-N Rubber | 7,200 psi @ 72° F | -20° to 212° | Steel | 00000000 | 000000 |
Nuts
- Temperature Range: See table
| For Tube OD | Nut Material | Max. Pressure | Temp. Range, °F | Each | |
| 1/8" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 00000 |
| 3/16" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 000 |
| 1/4" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 5/16" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 3/8" | Zinc-Plated Steel | 3,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 1/2" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 5/8" | Zinc-Plated Steel | 1,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 3/4" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 1" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 4mm | Zinc-Plated Steel | 1,400 psi @ 72° F | -20° to 230° | 00000000 | 000 |
| 6mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 8mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 10mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 12mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 15mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 18mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 22mm | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 28mm | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 230° | 00000000 | 00000 |
| 35mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
Sleeves
- Temperature Range: See table
| For Tube OD | Sleeve Material | Max. Pressure | Temp. Range, °F | Each | |
| 1/8" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 00000 |
| 3/16" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 1/4" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 000 |
| 5/16" | Zinc-Plated Steel | 4,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 3/8" | Zinc-Plated Steel | 3,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 1/2" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 5/8" | Zinc-Plated Steel | 1,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 3/4" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 1" | Zinc-Plated Steel | 2,000 psi @ 72° F | -65° to 400° | 000000000 | 0000 |
| 4mm | Zinc-Plated Steel | 1,400 psi @ 72° F | -20° to 230° | 00000000 | 000 |
| 6mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 000 |
| 8mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 000 |
| 10mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 000 |
| 12mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 000 |
| 15mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 18mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 22mm | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 28mm | Zinc-Plated Steel | 2,300 psi @ 72° F | -20° to 230° | 00000000 | 0000 |
| 35mm | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 212° | 00000000 | 0000 |
Plug and Cap Assortments
- Temperature Range: -20° to 230° F
| Number of Pieces | Includes | Material | Max. Pressure | Each | |
| 72 | Plug for 6 mm OD Tubing (4 each) Plug for 8 mm OD Tubing (4 each) Plug for 10 mm OD Tubing (6 each) Plug for 12 mm OD Tubing (6 each) Plug for 15 mm OD Tubing (6 each) Plug for 18 mm OD Tubing (4 each) Plug for 22 mm OD Tubing (4 each) Plug for 28 mm OD Tubing (2 each) Cap for 6 mm OD Tubing (4 each) Cap for 8 mm OD Tubing (4 each) Cap for 10 mm OD Tubing (6 each) Cap for 12 mm OD Tubing (6 each) Cap for 15 mm OD Tubing (6 each) Cap for 18 mm OD Tubing (4 each) Cap for 22 mm OD Tubing (4 each) Cap for 28 mm OD Tubing (2 each) Metal Box | Zinc-Plated Steel | 2,300 psi @ 72° F | 00000000 | 0000000 |
High-Pressure Compression Fittings for Steel Tubing
- For Use With: Hydraulic Fluid
- Specifications Met: DIN 2353, ISO 8434
Thicker walls make these fittings—sometimes called flareless or bite fittings—withstand about twice as much pressure as standard compression fittings, so they’re good for hydraulic power applications. Their single sleeve, or ferrule, bites into tubing as you tighten the nut, creating a seal that is leak tight even at high heat. The nut and sleeve are included. All meet ISO 8434 (formerly DIN 2353), which is an international standard for tube fitting pressures.
Zinc-plated steel fittings have fair corrosion resistance.
BSPP male threads have a gasket to prevent leaks.
For technical drawings and 3-D models, click on a part number.
Straight Adapters, Tube × Male Threaded Pipe
BSPP Male Threads with Gasket
- Temperature Range: See table
- Tubing: Use with seamless steel
For Tube | ||||||||
|---|---|---|---|---|---|---|---|---|
| OD, mm | Wall Thickness | Pipe Size | Material | Gasket Material | Maximum Pressure | Temperature Range, °F | Each | |
NPT Threads | ||||||||
| 6 | Not Rated | 1/4 | Steel | __ | 9,100 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
| 8 | Not Rated | 1/4 | Steel | __ | 9,100 psi @ 72° F | -75° to 750° | 00000000 | 0000 |
| 10 | Not Rated | 3/8 | Steel | __ | 9,100 psi @ 72° F | -75° to 750° | 00000000 | 0000 |
| 12 | Not Rated | 3/8 | Steel | __ | 9,100 psi @ 72° F | -75° to 750° | 00000000 | 0000 |
| 12 | Not Rated | 1/2 | Steel | __ | 9,100 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
| 14 | Not Rated | 1/2 | Steel | __ | 9,100 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
| 20 | Not Rated | 3/4 | Steel | __ | 5,800 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
| 25 | Not Rated | 1 | Steel | __ | 5,800 psi @ 72° F | -75° to 750° | 00000000 | 00000 |
BSPP Threads | ||||||||
| 12 | Not Rated | 1/2 | Steel | Buna-N Rubber | 9,100 psi @ 72° F | -20° to 212° | 00000000 | 0000 |
BSPT Threads | ||||||||
| 10 | Not Rated | 3/8 | Steel | __ | 9,100 psi @ 72° F | -75° to 750° | 00000000 | 0000 |
Straight Connectors, Tube
- Temperature Range: See table
- Tubing: See table
For Tube | |||||||
|---|---|---|---|---|---|---|---|
| OD, mm | Wall Thickness | Material | Maximum Pressure | Temperature Range, °F | For Tube Material | Each | |
| 6 | Not Rated | Steel | 11,600 psi @ 72° F | -75° to 750° | Steel | 00000000 | 00000 |
| 8 | Not Rated | Steel | 11,600 psi @ 72° F | -75° to 750° | Steel | 00000000 | 0000 |
| 10 | Not Rated | Steel | 11,600 psi @ 72° F | -75° to 750° | Steel | 00000000 | 0000 |
| 12 | Not Rated | Steel | 9,100 psi @ 72° F | -75° to 750° | Steel | 00000000 | 00000 |
| 14 | Not Rated | Steel | 9,100 psi @ 72° F | -75° to 750° | Steel | 00000000 | 00000 |
| 16 | Not Rated | Zinc-Plated Steel | 3,600 psi @ 72° F | -20° to 230° | Seamless Steel | 00000000 | 00000 |
| 20 | Not Rated | Steel | 6,000 psi @ 72° F | -75° to 750° | Steel | 00000000 | 00000 |
Nuts
- Temperature Range: -75° to 750° F
- Tubing: Use with seamless steel
| For Tube OD, mm | Nut Material | Maximum Pressure | Each | |
| 6 | Steel | 11,600 psi @ 72° F | 0000000 | 00000 |
| 8 | Steel | 11,600 psi @ 72° F | 0000000 | 0000 |
| 10 | Steel | 11,600 psi @ 72° F | 0000000 | 0000 |
| 12 | Steel | 9,100 psi @ 72° F | 0000000 | 0000 |
| 14 | Steel | 9,100 psi @ 72° F | 0000000 | 0000 |
| 16 | Steel | 9,100 psi @ 72° F | 0000000 | 0000 |
| 20 | Steel | 6,000 psi @ 72° F | 0000000 | 0000 |
| 25 | Steel | 6,000 psi @ 72° F | 0000000 | 00000 |
Sleeves
- Temperature Range: -75° to 750° F
- Tubing: Use with seamless steel
| For Tube OD, mm | Sleeve Material | Maximum Pressure | Each | |
| 6 | Steel | 11,600 psi @ 72° F | 0000000 | 00000 |
| 8 | Steel | 11,600 psi @ 72° F | 0000000 | 000 |
| 10 | Steel | 11,600 psi @ 72° F | 0000000 | 0000 |
| 12 | Steel | 9,100 psi @ 72° F | 0000000 | 0000 |
| 14 | Steel | 9,100 psi @ 72° F | 0000000 | 0000 |
| 16 | Steel | 9,100 psi @ 72° F | 0000000 | 0000 |
| 20 | Steel | 6,000 psi @ 72° F | 0000000 | 0000 |
| 25 | Steel | 6,000 psi @ 72° F | 0000000 | 0000 |
Vibration-Resistant Compression Fittings for Steel Tubing
BSPP Male
Threads with
Gasket and Washer
Threads with
Gasket and Washer
- For Use With: Cutting Oil, Diesel Fuel
- Temperature Range: -30° to 250° F
- Tubing: Use with seamless steel
- Specifications Met: DIN 3861
The sleeve (ferrule) in these fittings is made of rubber instead of metal, so it cushions the tubing and absorbs vibration while creating a tight seal. Fittings are also known as flareless fittings. They are zinc-plated steel for fair corrosion resistance.
BSPP male threads have a gasket and washer to prevent leaks.
For technical drawings and 3-D models, click on a part number.
Straight Adapters, Tube × Male Threaded Pipe
BSPP Male
Threads with
Gasket and Washer
Threads with
Gasket and Washer
Straight Adapters, Tube × Female Threaded Pipe
| For Tube OD, mm | Thread Size | Thread Pitch, mm | Material | Max. Pressure | Each | |
Metric Threads | ||||||
|---|---|---|---|---|---|---|
| 6 | M10 | 1 | Zinc-Plated Steel | 4,500 psi @ 72° F | 00000000 | 000000 |
O-Ring Face Seal Fittings for Steel Tubing
- For Use With: Air, Hydraulic Fluid
- Temperature Range: -30° to 250° F, except BSPP fittings are -20° to 230° F
- Tubing: Use with seamless steel
- Specifications Met: SAE J1453
A tube adapter sits flush against the flat face of the fitting so you can slide the tubing and fitting sideways to disconnect in cramped spaces. Fittings are also known as zero-clearance fittings. To install, weld a tube adapter to the tubing with a brazing ring (sold separately), then mate the tube adapter to the fitting and screw on the nut. As the nut is tightened, the tube adapter compresses the O-ring, creating a strong seal. Fittings are zinc-plated steel for fair corrosion resistance. Nuts and tube adapters are sold separately.
For technical drawings and 3-D models, click on a part number.
