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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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Extreme-Pressure Stainless Steel Threaded Pipe Fittings
With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines. 316 stainless steel fittings have excellent corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads. BSPP and metric male threads have either a gasket or a gasket and washer to prevent leaks. UN/UNF (SAE) threads are also known as O-ring boss threads; the male threads have a gasket to prevent leaks.
For technical drawings and 3-D models, click on a part number.
Male Threads with
Gasket and Washer
- For Use With: See table
- Specifications Met: See table
316 Stainless Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size (A) | Thread Size (A) | Dash Size (A) | Pipe Size (B) | Thread Size (B) | Dash Size (B) | Max. Pressure | For Use With | Specifications Met | Each | |
NPTF Male × UN/UNF (SAE) Male | ||||||||||
| 3/4 | __ | 12 | __ | 1 1/16"-12 | 12 | 6,000 psi @ 72° F | Hydraulic Fluid (Petroleum Base), Oil, Water | SAE J514 | 000000000 | 0000000 |
UN/UNF (SAE) Male × BSPP Male | ||||||||||
| __ | 1 1/16"-12 | 12 | 1/2 | __ | 08 | 3,500 psi @ 72° F | Hydraulic Fluid, Oil, Water | ISO 1179, ISO 8434-6, SAE J1926 | 00000000 | 00000 |
| __ | 1 1/16"-12 | 12 | 3/4 | __ | 12 | 3,500 psi @ 72° F | Hydraulic Fluid, Oil, Water | ISO 1179, ISO 8434-6, SAE J1926 | 00000000 | 00000 |
| __ | 1 1/16"-12 | 12 | 1 | __ | 16 | 2,900 psi @ 72° F | Hydraulic Fluid, Oil, Water | ISO 1179, ISO 8434-6, SAE J1926 | 00000000 | 000000 |
Compact Extreme-Pressure Steel Threaded Pipe Fittings
These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized steel, which has fair corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads. BSPP and metric male threads have either a gasket, or a gasket and washer, to prevent leaks. UN/UNF (SAE) threads are also known as O-ring boss threads; the male threads have either a gasket or a gasket and washer to prevent leaks.
For technical drawings and 3-D models, click on a part number.
(SAE) Male Threads with
Gasket and Washer
- For Use With: See table
- Specifications Met: See table
| Pipe Size (A) | Thread Size (A) | Dash Size (A) | Pipe Size (B) | Thread Size (B) | Dash Size (B) | Max. Pressure | For Use With | Specifications Met | Each | |
NPTF Male × UN/UNF (SAE) Male | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | __ | 08 | __ | 1 1/16"-12 | 12 | 5,000 psi @ 72° F | Air, Hydraulic Fluid, Water | ASTM A108 | 000000000 | 00000 |
| 3/4 | __ | 12 | __ | 1 1/16"-12 | 12 | 5,000 psi @ 72° F | Air, Hydraulic Fluid, Water | ASTM A108 | 000000000 | 00000 |
UN/UNF (SAE) Male × BSPP Male | ||||||||||
| __ | 1 1/16"-12 | 12 | 1/2 | __ | 08 | 3,500 psi @ 72° F | Air, Hydraulic Fluid, Oil, Water | ISO 1179, ISO 11926, ISO 8434-6, SAE J1926 | 00000000 | 00000 |
| __ | 1 1/16"-12 | 12 | 3/4 | __ | 12 | 3,500 psi @ 72° F | Air, Hydraulic Fluid, Oil, Water | ISO 1179, ISO 11926, ISO 8434-6, SAE J1926 | 00000000 | 00000 |
| __ | 1 1/16"-12 | 12 | 1 | __ | 16 | 3,500 psi @ 72° F | Air, Hydraulic Fluid, Oil, Water | ISO 1179, ISO 11926, ISO 8434-6, SAE J1926 | 00000000 | 00000 |
Metal Push-On Barbed Hose Fittings for Air and Water
Fittings have sharper barbs than standard barbed hose fittings to grip rubber push-on hose with no clamps or ferrules required. The more you pull on the fittings, the tighter the hose will grip.
Brass fittings are softer than other metal fittings, so they’re easier to thread together. They have good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance, so they’re the best choice for high-humidity environments.
Fittings that swivel until tightened rotate 360° for easy installation.
Fittings with a flared end meet JIC or SAE standards for dimensions. Fittings with a 37° flared end are also known as JIC (Joint Industrial Council) fittings. The optional installation tool (sold separately) allows you to connect large quantities of barbed fittings to push-on hose. Use the built-in cutter to squarely cut the hose without fraying. Then, clamp the hose into the tool’s vise and apply light pressure on the handle to drive into the fitting. Note: To ensure proper connection, the barbed end has to be pushed in all the way, with the hose end concealed by the ring.
For technical drawings and 3-D models, click on a part number.
Mounting Hole | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Hose ID Range | Lg. | Ht. | Dp. | Dia. | No. of | Mounting Fasteners Included | Each | |
| 1/4" to 3/4" | 13 1/2" | 7" | 2 3/8" | 7/16" | 4 | No | 00000000 | 0000000 |
International Standard ISO Minimal-Spill
Quick-Disconnect Hose Couplings for Hydraulic Fluid
Also known as flush-face couplings, the plugs and sockets have a flat face, which allows them to mate close against each other, reducing fluid loss when connecting and disconnecting the line. 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 International Standard ISO Minimal-Spill quick-disconnect plugs are compatible with any of the International Standard ISO Minimal-Spill quick-disconnect sockets of the same coupling size, regardless of the pipe size. Couplings are compatible with ISO 16028 Parker FEM, ISO 16028 Perfecting HT, and ISO 16028 Snap-Tite 74 couplings. Also known as double shut-off couplings, the plugs and sockets both have a shut-off valve that stops the flow when the coupling is separated. They are zinc-plated steel, which has excellent strength and durability and fair corrosion resistance.
Plugs are also known as nipples.
Sockets are push-to-connect style. To connect, push the plug into the socket until you hear a click. To disconnect, slide the sleeve on the socket forward until the plug ejects.
Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size. Pressure ratings are given for static (constant) pressure conditions.
Warning: Never attempt to connect or disconnect couplings when operating at maximum pressure. Stop the flow before you disconnect the line.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: See table
- Temperature Range: -20° to 212° F
- Compatible With: ISO 16028 Parker FEM, ISO 16028 Perfecting HT, ISO 16028 Snap-Tite 74
- Specifications Met: ISO 16028
- Maximum Pressure: See table
- Temperature Range: -20° to 212° F
- Compatible With: ISO 16028 Parker FEM, ISO 16028 Perfecting HT, ISO 16028 Snap-Tite 74
- Specifications Met: ISO 16028
37° Flared Fittings for Copper Tubing
- For Use With: Air, Fuel Oil, Mineral Oil, Water
- Temperature Range: -40° to 400° F
- Tubing: Use with seamless copper
- Specifications Met: ISO 8434, MIL-F-18866, SAE J514
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They can handle higher pressures than 45° flared fittings. Fittings are brass for 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.
37° Flared Fittings for Stainless Steel Tubing
UN/UNF (SAE) Male
Threads with Gasket
- Tubing: Use with welded or seamless 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
- Specifications Met: ISO 8434, SAE J514, except fittings with BSPP and BSPT threads meet SAE J514 only
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They are 316 stainless steel for excellent corrosion resistance. Fittings require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
BSPP threads and UN/UNF (SAE) male threads have a gasket to protect against leaks. UN/UNF (SAE) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
UN/UNF (SAE) Male
Threads with Gasket
- For Use With: See table
- Temperature Range: See table
| For Tube OD | Pipe Size | Thread Size | For Use With | Material | Gasket Material | Max. Pressure | Temp. Range, ° F | Each | |
NPT Threads | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 3/4" | 3/4 | __ | Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water | 316 Stainless Steel | __ | 4,500 psi @ 72° F | -420 to 1200° | 000000000 | 000000 |
UN/UNF (SAE) Threads | |||||||||
| 3/4" | __ | 7/8"-14 | Air, Hydraulic Fluid, Isopropyl Alcohol, Water | 316 Stainless Steel | Fluoroelastomer Rubber | 6,000 psi @ 72° F | -15 to 400° | 000000000 | 00000 |
| 3/4" | __ | 1 1/16"-12 | Air, Hydraulic Fluid, Isopropyl Alcohol, Water | 316 Stainless Steel | Fluoroelastomer Rubber | 6,000 psi @ 72° F | -15 to 400° | 000000000 | 00000 |
- For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
- Temperature Range: -420° to 1,200° F
| For Tube OD | Nut Material | Each | |
| 3/4" | 316 Stainless Steel | 000000000 | 000000 |
Precision AN 37° Flared Fittings for Stainless Steel Tubing
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Water
- Temperature Range: -320° to 1200° F
- Tubing: Use with seamless 304 or 316 stainless steel
- Specifications Met: See Table
The threads on the tube end of these fittings are Class 3A or 3B and adhere to tighter tolerances than other 37° flared fittings. They are made to exact AS (formerly AN) specifications and provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Vibration-Resistant Precision AN 37° Flared Fittings for Stainless Steel Tubing
- For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Water
- Temperature Range: -320° to 500° F
- Tubing: Use with seamless 304 or 316 stainless steel
- Specifications Met: See Table
A PTFE seal on the tube end of these fittings allows for an extra-strong connection in high-vibration applications. The threads on the tube end are Class 3A and adhere to tighter tolerances than other 37° flared fittings. They are made to exact AS (formerly AN) specifications and provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings are 316 stainless steel for excellent 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 | Pipe Size | Material | Max. Pressure | Specifications Met | Each | |
ANPT Threads | ||||||
|---|---|---|---|---|---|---|
| 3/4" | 3/4 | 316 Stainless Steel | 3,000 psi @ 72° F | ASTM A380, SAE AS9104/1, AN816-12K, SAE AS9100D | 00000000 | 000000 |
| For Tube OD | Nut Material | Max. Pressure | Specifications Met | Each | |
| 3/4" | 316 Stainless Steel | 3,000 psi @ 72° F | AN818-12K, ASTM A380, SAE AS4841 | 00000000 | 000000 |
| For Tube OD | Sleeve Material | Max. Pressure | Specifications Met | Each | |
| 3/4" | 316 Stainless Steel | 3,000 psi @ 72° F | AN819-12K, ASTM A380, MS20819, SAE AS4841 | 00000000 | 00000 |
37° Flared Fittings for Steel Tubing
- Tubing: Use with seamless steel
- Specifications Met: SAE J514
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately. Fittings are zinc-plated steel for fair corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads.
To prevent leaks, UN/UNF (SAE) male threads have a gasket. Metric and BSPP male threads have either a gasket or a gasket and washer.
For technical drawings and 3-D models, click on a part number.
- For Use With: See Table
- Temperature Range: See Table
| For Tube OD | Pipe Size | Thread Size | Thread Pitch, mm | For Use With | O-Ring Material | Material | Gasket Material | Max. Pressure | Temp. Range, °F | Each | |
NPTF Threads | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3/4" | 3/4 | __ | __ | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | __ | Zinc-Plated Steel | __ | 3,300 psi @ 72° F | -60° to 400° | 000000000 | 00000 |
Metric Threads | |||||||||||
| 3/4" | __ | M22 | 1.5 | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | Buna-N Rubber | Zinc-Plated Steel | Buna-N Rubber | 2,300 psi @ 72° F | -30° to 200° | 00000000 | 00000 |
| 3/4" | __ | M27 | 2 | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | Buna-N Rubber | Zinc-Plated Steel | Buna-N Rubber | 1,400 psi @ 72° F | -30° to 200° | 00000000 | 00000 |
BSPP Threads | |||||||||||
| 3/4" | 1/2 | __ | __ | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | Buna-N Rubber | Zinc-Plated Steel | Buna-N Rubber | 4,000 psi @ 72° F | -30° to 200° | 00000000 | 00000 |
| 3/4" | 3/4 | __ | __ | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | Buna-N Rubber | Zinc-Plated Steel | Buna-N Rubber | 4,000 psi @ 72° F | -30° to 200° | 00000000 | 00000 |
| 3/4" | 1 | __ | __ | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | Buna-N Rubber | Zinc-Plated Steel | Buna-N Rubber | 3,500 psi @ 72° F | -30° to 200° | 00000000 | 00000 |
| 1" | 3/4 | __ | __ | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | Buna-N Rubber | Zinc-Plated Steel | Buna-N Rubber | 4,000 psi @ 72° F | -30° to 200° | 00000000 | 00000 |
BSPT Threads | |||||||||||
| 3/4" | 1/2 | __ | __ | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | __ | Zinc-Plated Steel | __ | 4,000 psi @ 72° F | -60° to 400° | 00000000 | 00000 |
| 3/4" | 3/4 | __ | __ | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | __ | Zinc-Plated Steel | __ | 4,000 psi @ 72° F | -60° to 400° | 00000000 | 00000 |
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60°F to 400°F
Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.
| For Tube OD | Pipe Size | Material | Nut Material | Max. Pressure | Each | |
BSPP Threads | ||||||
|---|---|---|---|---|---|---|
| 3/4" | 3/4 | Zinc-Plated Steel | Steel | 4,000 psi @ 72° F | 00000000 | 000000 |
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F
Use these sleeves with a nut and fitting to provide a tight metal-to-metal seal on steel tubing that is flared to 37°. Sleeves are zinc-plated steel for fair corrosion resistance. They are also known as ferrules.
Sleeves for metric tube ODs convert the fitting from inch to metric.
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 | Pipe Size | Material | Max. Pressure | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
| 3/4" | 3/4 | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 000000 |
| For Tube OD | Nut Material | Max. Pressure | Each | |
| 3/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 00000 |
| For Tube OD | Sleeve Material | Max. Pressure | Each | |
| 3/4" | Anodized 2024 Aluminum | 3,000 psi @ 72° F | 0000000 | 00000 |