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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High-Pressure Steel Threaded Pipe Cap and Plug Assortments
The heavy duty caps and plugs in these assortments come in various sizes and stand up to high-pressure flow applications. Made of steel, they’re for use in noncorrosive environments. You can take them apart as needed for maintenance and repair because they’re threaded.
| Thread Type | Number of Pieces | Plug Construction | Max. Pressure | Includes | Material | Each | |
NPT | 64 | Solid | 2,000 psi to 5,000 psi | 32 Caps in the following pipe sizes: 1/8 (10 ea.) 11/16" Lg. 1/4 (8 ea.) 3/4" Lg. 3/8 (6 ea.) 13/16" Lg. 1/2 (4 ea.) 1" Lg. 3/4 (2 ea.) 1 1/2" Lg. 1 (2 ea.) 1 1/4" Lg. 32 Plugs in the following pipe sizes: 1/8 (10 ea.) 9/16" Lg. 1/4 (8 ea.) 3/4" Lg. 3/8 (6 ea.) 3/4" Lg. 1/2 (4 ea.) 15/16" Lg. 3/4 (2 ea.) 1 1/8" Lg. 1 (2 ea.) 1 3/8" Lg. | Steel | 0000000 | 0000000 |
| BSPP | 48 | Solid | 2,000 psi to 5,000 psi | 24 Caps in the following pipe sizes: 1/8 (4 ea.) 15 mm Lg. 1/4 (4 ea.) 17 mm Lg. 3/8 (4 ea.) 18 mm Lg. 1/2 (4 ea.) 22 mm Lg. 5/8 (2 ea.) 22 mm Lg. 3/4 (4 ea.) 27 mm Lg. 1 (2 ea.) 30 mm Lg. 24 Plugs in the following pipe sizes: 1/8 (4 ea.) 17 mm Lg. 1/4 (4 ea.) 19 mm Lg. 3/8 (4 ea.) 20 mm Lg. 1/2 (4 ea.) 23 mm Lg. 5/8 (2 ea.) 27 mm Lg. 3/4 (4 ea.) 24 mm Lg. 1 (2 ea.) 30 mm Lg. | Steel | 0000000 | 000000 |
High-Pressure Stainless Steel Threaded Pipe Fittings
Use these heavy duty fittings in high-pressure flow applications.
316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Coolant, Diesel Fuel, Steam, Hydraulic Fluid, Natural Gas, Oil, Water
- Specifications Met: NSF/ANSI 169
- Pipe Nipples and Pipe: Use Schedule 80 stainless steel
- Temperature Range: -100° to 550° F
316 Stainless Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Size | Thread Pitch, mm | Dash Size | Lg., mm | Drive Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Max. Vacuum | Each | |
BSPT Male | |||||||||||
| 1/8 | __ | __ | 02 | 7.5 | 5 mm | Solid | 2,000 psi @ 72° F | Not Rated | 29 in. of Hg @ 72° F | 00000000 | 000000 |
| 1/4 | __ | __ | 04 | 10 | 6 mm | Solid | 2,000 psi @ 72° F | Not Rated | 29 in. of Hg @ 72° F | 00000000 | 00000 |
| 3/8 | __ | __ | 06 | 11 | 8 mm | Solid | 2,000 psi @ 72° F | Not Rated | 29 in. of Hg @ 72° F | 00000000 | 00000 |
| 1/2 | __ | __ | 08 | 13 | 10 mm | Solid | 2,000 psi @ 72° F | Not Rated | 29 in. of Hg @ 72° F | 00000000 | 00000 |
BSPP Male | |||||||||||
| 1/8 | __ | __ | 02 | 8.5 | 5 mm | Solid | 2,000 psi @ 72° F | Not Rated | 29 in. of Hg @ 72° F | 00000000 | 00000 |
| 1/4 | __ | __ | 04 | 11 | 6 mm | Solid | 2,000 psi @ 72° F | Not Rated | 29 in. of Hg @ 72° F | 00000000 | 00000 |
Metric Male | |||||||||||
| __ | M5 | 0.8 | __ | 6 | 2 mm | Solid | 2,000 psi @ 72° F | Not Rated | 29 in. of Hg @ 72° F | 00000000 | 00000 |
- For Use With:
NPT Threads: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
BSPP Threads: Air, Coolant, Diesel Fuel, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Metric Threads: Air, Water, Hydraulic Fluid - Pressure Class:
NPT Threads: 3000 - Specifications Met:
NPT: ASTM A182
BSPP: NSF/ANSI 169 - Pipe Nipples and Pipe:
NPT and BSPP Threads: Use Schedule 80 stainless steel - Temperature Range: See table
316 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size | Dash Size | Plug Construction | Max. Vacuum | Temperature Range, °F | Max. Pressure | Max. Steam Pressure | Each | |
BSPP Male | ||||||||
| 1/8 | 02 | Hollow | 29 in. of Hg @ 72° F | -100° to 550° | 2,000 psi @ 72° F | Not Rated | 00000000 | 000000 |
| 1/4 | 04 | Hollow | 29 in. of Hg @ 72° F | -100° to 550° | 2,000 psi @ 72° F | Not Rated | 00000000 | 00000 |
| 3/8 | 06 | Hollow | 29 in. of Hg @ 72° F | -100° to 550° | 2,000 psi @ 72° F | Not Rated | 00000000 | 00000 |
| 1/2 | 08 | Hollow | 29 in. of Hg @ 72° F | -100° to 550° | 2,000 psi @ 72° F | Not Rated | 00000000 | 00000 |
| 3/4 | 12 | Hollow | 29 in. of Hg @ 72° F | -100° to 550° | 2,000 psi @ 72° F | Not Rated | 00000000 | 00000 |
Aluminum Quick-Connect Pipe Fittings for Compressed Air
Twist these fittings onto aluminum pipe for quick, sealed connections—no threading, soldering, or welding necessary. Use them to build a compressed air system in half the time it would take to build a copper or steel system. Also known as Unipipe fittings, they’re part of a quick-connect system that’s compatible with pipe from Unipipe, Transair, and Infinity.
Finger tighten the collar on the end of these fittings, then use a wrench for the final quarter turn. The inside of these fittings has a compression ring and O-ring to seal against the pipe. They’re easy to take apart as needed to modify your setup.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Coolant, Nitrogen, Oil
- Temperature Range: 0° to 210° F
- Specifications Met: ASME B31.1, ASME B31.3, ASME B31.9
- Pipe Nipples and Pipe: Use Quick-Disconnect Aluminum
Plugs block the end of a fitting. They include a ¼ BSPP valve that can be used to exhaust your line or attach a pressure gauge. To install, remove the fitting's nut, collar, and grip ring. Insert the plug into the fitting, slide the collar on, and tighten the nut. Discard the connector's grip ring.
37° Flared Fittings for Aluminum Tubing
- For Use With: Air, Coolant, Gasoline, Hydraulic Fluid, Water
- Temperature Range: -60° to 400° F
- Tubing: Use with seamless aluminum
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings are aluminum, which is lightweight with good corrosion resistance. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
For technical drawings and 3-D models, click on a part number.
| For Tube OD | Material | Max. Pressure | Each | |
| 1/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 00000 |
| 3/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1/2" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 5/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 3/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1" | Anodized 2024 Aluminum | 1,500 psi @ 72° F | 0000000 | 00000 |
| For Tube OD | Nut Material | Max. Pressure | Each | |
| 1/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 00000 |
| 3/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1/2" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 5/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 3/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1" | Anodized 2024 Aluminum | 1,500 psi @ 72° F | 0000000 | 00000 |
| For Tube OD | Sleeve Material | Max. Pressure | Each | |
| 1/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 00000 |
| 3/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1/2" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 5/8" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 3/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 0000 |
| 1" | Anodized 2024 Aluminum | 1,500 psi @ 72° F | 0000000 | 0000 |
Quick-Disconnect Hose Couplings for Coolant
Also known as coolant-line mold couplings, these couplings are often used to install and remove coolant lines in molding and die casting applications. A complete coupling consists of a plug and a socket (both sold separately) that connect and disconnect quickly. Use them when you need frequent access to a line. All of the quick-disconnect coolant plugs are compatible with any of the quick-disconnect coolant sockets of the same coupling size, regardless of the pipe size or barbed hose ID.
Open-flow plugs and sockets do not have a shut-off valve, so the couplings allow for maximum flow. Plugs are also known as nipples.
Zinc-plated steel plugs have fair corrosion resistance and are stronger and more durable than brass. Brass plugs and sockets have better corrosion resistance than zinc-plated steel, and are softer, so they’re easier to thread together.
NPTF (Dryseal) threads are compatible with NPT threads. Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.
Warning: For open-flow plugs and sockets, stop the flow of coolant before you disconnect the line.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 200 psi @ 72° F
- Temperature Range: -30° to 400° F
- Compatible With: See Table
Plug Tip | Open Flow | ||||||
|---|---|---|---|---|---|---|---|
| Coupling Size | Lg. | Dia. | Pipe Size | Lg. | Compatible With | Each | |
Brass | |||||||
| 1/4 | 7/32" | 3/8" | 1/8 | 59/64" | Foster FP, Foster FS, Hansen FT, Parker Moldmate | 0000000 | 00000 |
| 1/4 | 7/32" | 3/8" | 1/8 | 15/16" | Hansen FT | 0000000 | 0000 |
| 1/4 | 7/32" | 3/8" | 1/4 | 1 5/32" | Foster FP, Foster FS, Hansen FT, Parker Moldmate | 0000000 | 0000 |
| 1/4 | 7/32" | 3/8" | 1/4 | 1 5/32" | Hansen FT | 0000000 | 0000 |
| 1/4 | 7/32" | 3/8" | 3/8 | 1 3/16" | Foster FP, Foster FS, Hansen FT, Parker Moldmate | 0000000 | 0000 |
| 1/4 | 7/32" | 3/8" | 3/8 | 1 3/16" | Hansen FT | 0000000 | 0000 |
| 3/8 | 3/8" | 1/2" | 1/4 | 1 13/32" | Hansen FT | 0000000 | 0000 |
| 3/8 | 3/8" | 1/2" | 3/8 | 1 13/32" | Hansen FT | 0000000 | 0000 |
| 3/8 | 3/8" | 1/2" | 1/2 | 1 9/16" | Hansen FT | 0000000 | 0000 |
| 3/8 | 3/8" | 17/32" | 3/8 | 1 25/64" | Foster FP, Foster FS, Hansen FT, Parker Moldmate | 0000000 | 0000 |
| 3/8 | 3/8" | 17/32" | 1/2 | 1 29/64" | Foster FP, Foster FS, Hansen FT, Parker Moldmate | 0000000 | 0000 |
| 1/2 | 17/32" | 23/32" | 1/2 | 1 3/4" | Hansen FT | 0000000 | 0000 |
| 1/2 | 17/32" | 23/32" | 3/4 | 1 3/4" | Hansen FT | 0000000 | 00000 |
- Maximum Pressure: 200 psi @ 72° F
- Temperature Range: -30° to 400° F
- Compatible With:
Zinc-Plated Steel: Foster FP, Foster FS, Hansen FT, Parker Moldmate
Brass: Hansen FT
Plug Tip | Open Flow | |||||
|---|---|---|---|---|---|---|
| Coupling Size | Lg. | Dia. | Pipe Size | Lg. | Each | |
Zinc-Plated Steel | ||||||
| 1/4 | 7/32" | 3/8" | 1/8 | 1" | 0000000 | 00000 |
| 1/4 | 7/32" | 3/8" | 1/4 | 1 9/32" | 0000000 | 0000 |
| 1/4 | 7/32" | 3/8" | 3/8 | 1 3/8" | 0000000 | 0000 |
| 3/8 | 3/8" | 17/32" | 3/8 | 1 9/16" | 0000000 | 0000 |
Brass | ||||||
| 1/4 | 7/32" | 3/8" | 1/8 | 1" | 0000000 | 0000 |
| 1/4 | 7/32" | 3/8" | 1/4 | 1 13/64" | 0000000 | 0000 |
| 3/8 | 3/8" | 1/2" | 1/4 | 1 3/8" | 0000000 | 0000 |
| 3/8 | 3/8" | 1/2" | 3/8 | 1 13/32" | 0000000 | 0000 |
| 3/8 | 3/8" | 1/2" | 1/2 | 1 5/8" | 0000000 | 0000 |
| 1/2 | 17/32" | 23/32" | 1/2 | 1 23/32" | 0000000 | 00000 |
Minimal-Spill Quick-Disconnect Hose Couplings for Coolant
Reduce the risk of spills near electronics when connecting and disconnecting liquid cooling lines. Also known as double shut-off couplings, these couplings have a shut-off valve on both sides that stops the flow of coolant if they’re separated. Often used to connect servers to a cooling manifold in data centers, they comply with the performance specifications of OCP (Open Computing Project). To avoid mixing up your lines, choose blue couplings for cold supply and red couplings for hot return. A complete coupling consists of a plug and socket or two adapters (all sold separately).
Install plugs on manifolds and servers. They’re also known as nipples.
UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
BSPP male threads have a gasket to protect against leaks.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: See Table
- Temperature Range: -40° to 300° F
- Material: 303 Stainless Steel
- Compatible With: Danfoss Hansen UQD
Plug Tip | |||||||
|---|---|---|---|---|---|---|---|
| Coupling Size | Lg. | Dia. | Thread Size | Dash Size | Max. Pressure | Each | |
Blue | |||||||
| 1/8 | 27/32" | 1/4" | 7/16"-20 | 04 | 290 psi @ 72° F | 0000000 | 000000 |
| 1/4 | 1 1/8" | 7/16" | 9/16"-18 | 06 | 230 psi @ 72° F | 0000000 | 00000 |
| 3/8 | 1 9/32" | 9/16" | 3/4"-16 | 08 | 100 psi @ 72° F | 0000000 | 00000 |
| 1/2 | 1 7/16" | 11/16" | 7/8"-14 | 10 | 100 psi @ 72° F | 0000000 | 00000 |
Red | |||||||
| 1/8 | 27/32" | 1/4" | 7/16"-20 | 04 | 290 psi @ 72° F | 0000000 | 00000 |
| 1/4 | 1 1/8" | 7/16" | 9/16"-18 | 06 | 230 psi @ 72° F | 0000000 | 00000 |
| 3/8 | 1 9/32" | 9/16" | 3/4"-16 | 08 | 100 psi @ 72° F | 0000000 | 00000 |
| 1/2 | 1 7/16" | 11/16" | 7/16"-14 | 10 | 100 psi @ 72° F | 0000000 | 00000 |
- Maximum Pressure: See Table
- Temperature Range: -40° to 300° F
- Material: 303 Stainless Steel
- Compatible With: Danfoss Hansen UQD
Plug Tip | |||||||
|---|---|---|---|---|---|---|---|
| Coupling Size | Lg. | Dia. | Pipe Size | Dash Size | Max. Pressure | Each | |
Blue | |||||||
| 1/8 | 27/32" | 1/4" | 1/8 | 02 | 290 psi @ 72° F | 0000000 | 000000 |
| 1/4 | 1 1/8" | 7/16" | 3/8 | 06 | 230 psi @ 72° F | 0000000 | 00000 |
| 3/8 | 1 9/32" | 9/16" | 3/8 | 06 | 100 psi @ 72° F | 0000000 | 00000 |
| 1/2 | 1 7/16" | 11/16" | 1/2 | 08 | 100 psi @ 72° F | 0000000 | 00000 |
Red | |||||||
| 1/8 | 27/32" | 1/4" | 1/8 | 02 | 290 psi @ 72° F | 0000000 | 00000 |
| 1/4 | 1 1/8" | 7/16" | 3/8 | 06 | 230 psi @ 72° F | 0000000 | 00000 |
| 3/8 | 1 9/32" | 9/16" | 3/8 | 06 | 100 psi @ 72° F | 0000000 | 00000 |
| 1/2 | 1 7/16" | 11/16" | 1/2 | 08 | 100 psi @ 72° F | 0000000 | 00000 |
Pop-Up Full-Tank Indicators
Avoid overfilling—these indicators pop up when your tank is almost full.
Indicators with a polypropylene float have a plastic window to protect the indicator’s movement and keep it working properly. When you see the indicator behind the overfill alert warning, you'll know your tank is almost full.
Alarms flash and sound when your tank is almost full.
For technical drawings and 3-D models, click on a part number.
with
Float Rod
Temp. Range, °F | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Overall Ht. | Max. Pressure | Window Ht. | Min. | Max. | For Use With | Seal Material | Window Material | Features | Each | |
Polypropylene Plastic Float with Aluminum Float Rod | |||||||||||
| 3/4 | 10" | 70 psi @ 70° F | 3" | -50° | 110° | Water, Hydraulic Fluid, Diesel Fuel, Alcohol-Based Solvents, Coolant, Fuel Oil, Gasoline, Glycerin | Buna-N Rubber | Cellulose Acetate Plastic | UV Resistant | 0000000 | 000000 |
| 3/4 | 12" | 70 psi @ 70° F | 3" | -50° | 110° | Water, Hydraulic Fluid, Diesel Fuel, Alcohol-Based Solvents, Coolant, Fuel Oil, Gasoline, Glycerin | Buna-N Rubber | Cellulose Acetate Plastic | UV Resistant | 0000000 | 00000 |
| 3/4 | 16" | 70 psi @ 70° F | 3" | -50° | 110° | Water, Hydraulic Fluid, Diesel Fuel, Alcohol-Based Solvents, Coolant, Fuel Oil, Gasoline, Glycerin | Buna-N Rubber | Cellulose Acetate Plastic | UV Resistant | 0000000 | 00000 |
| 1 1/2 | 10" | 70 psi @ 70° F | 3" | -50° | 110° | Water, Hydraulic Fluid, Diesel Fuel, Alcohol-Based Solvents, Coolant, Fuel Oil, Gasoline, Glycerin | Buna-N Rubber | Cellulose Acetate Plastic | UV Resistant | 0000000 | 00000 |
| 1 1/2 | 12" | 70 psi @ 70° F | 3" | -50° | 110° | Water, Hydraulic Fluid, Diesel Fuel, Alcohol-Based Solvents, Coolant, Fuel Oil, Gasoline, Glycerin | Buna-N Rubber | Cellulose Acetate Plastic | UV Resistant | 0000000 | 00000 |
| 1 1/2 | 16" | 70 psi @ 70° F | 3" | -50° | 110° | Water, Hydraulic Fluid, Diesel Fuel, Alcohol-Based Solvents, Coolant, Fuel Oil, Gasoline, Glycerin | Buna-N Rubber | Cellulose Acetate Plastic | UV Resistant | 0000000 | 00000 |
| 2 | 10" | 70 psi @ 70° F | 3" | -50° | 110° | Water, Hydraulic Fluid, Diesel Fuel, Alcohol-Based Solvents, Coolant, Fuel Oil, Gasoline, Glycerin | Buna-N Rubber | Cellulose Acetate Plastic | UV Resistant | 0000000 | 00000 |
| 2 | 12" | 70 psi @ 70° F | 3" | -50° | 110° | Water, Hydraulic Fluid, Diesel Fuel, Alcohol-Based Solvents, Coolant, Fuel Oil, Gasoline, Glycerin | Buna-N Rubber | Cellulose Acetate Plastic | UV Resistant | 0000000 | 00000 |
| 2 | 16" | 70 psi @ 70° F | 3" | -50° | 110° | Water, Hydraulic Fluid, Diesel Fuel, Alcohol-Based Solvents, Coolant, Fuel Oil, Gasoline, Glycerin | Buna-N Rubber | Cellulose Acetate Plastic | UV Resistant | 0000000 | 00000 |
Light | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Cord Length, ft. | Signal Type | Color | Pattern | No. of | Bulb Type | Volume | Housing Material | Batteries Included | |
Direct Mount | |||||||||
| __ | Audible Alarm, Signal Light | Red | Flashing | 1 | LED | 110 dB | ABS Plastic | No | 00000000 |
Remote Mount | |||||||||
| 25 | Audible Alarm, Signal Light | Red | Flashing | 1 | LED | 110 dB | ABS Plastic | No | 00000000 |
| 50 | Audible Alarm, Signal Light | Red | Flashing | 1 | LED | 110 dB | ABS Plastic | No | 00000000 |
| 75 | Audible Alarm, Signal Light | Red | Flashing | 1 | LED | 110 dB | ABS Plastic | No | 00000000 |
| 100 | Audible Alarm, Signal Light | Red | Flashing | 1 | LED | 110 dB | ABS Plastic | No | 00000000 |