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 Straight) 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.
- Specifications Met: See table
- For Use With: See table
316 Stainless Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size (A)  | Thread Size (A) | Dash Size (A) | Pipe Size (B) | Dash Size (B) | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPTF Female × NPTF Male | ||||||||||
| 3/4 | __ | 12 | 3/4 | 12 | 4,600 psi @ 72° F | 4,600 psi @ 300° F | Hydraulic Fluid, Oil, Steam, Water | ASTM A479 | 000000000 | 0000000 |
UN/UNF (SAE Straight) Female × BSPT Male | ||||||||||
| __ | 1 1/16"-12 | 12 | 3/4 | 12 | 4,500 psi @ 72° F | __ | Hydraulic Fluid, Oil, Water | ISO 8434-1, SAE J514 | 000000000 | 000000 |
- Specifications Met: See table
- For Use With: See table
Pipe Size | Dash Size | 316 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPTF Female × NPTF Male | |||||||||
| 3/4 | 3/8 | 12 | 06 | 4,600 psi @ 72° F | 4,600 psi @ 300° F | Hydraulic Fluid, Oil, Steam, Water | ASTM A479 | 000000000 | 0000000 |
Threads with
Gasket and Washer
- For Use With: Hydraulic Fluid, Oil, Water
- Specifications Met:
NPT × BSPP and BSPP × NPT: ASME B1.20.3, ISO 1179, ISO 8434-6
BSPP × BSPT and BSPT × BSPP: DIN EN 10226, ISO 1179, ISO 7.1, ISO 8434-6
Standard-Wall Steel Threaded Pipe Nipples and Pipe
Also known as Schedule 40, this pipe is designed for low-pressure applications. Use in noncorrosive applications.
Welded pipe has a weld bead on the inside.
Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASME B1.20.1, DIN EN 10226, ANSI/ASME BS21
- Fittings: Use Class 150 Iron and Steel
| Pipe Size | Lg. | Construction | Material | Each | |
| 2 | 1 59/64" | Welded | Steel | 00000000 | 000000 |
Standard-Wall Galvanized Steel Threaded Pipe Nipples and Pipe
Made of galvanized steel, this Schedule 40 pipe has fair corrosion resistance and is designed for low-pressure applications.
Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met: ANSI/ASME BS21, DIN EN 10226, ASME B1.20.1
- Fittings: Use Class 150 galvanized iron and galvanized steel
- Flanges: Use Class 150 galvanized steel
| Pipe Size | Lg. | Construction | Each | |
| 2 | 1 59/64" | Welded | 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 and zinc-plated steel, which have better corrosion resistance than plain steel fittings.
For technical drawings and 3-D models, click on a part number.
- For Use With: See table
- Specifications Met: See table
| Pipe Size (A) | Dash Size (A) | Pipe Size (B) | Dash Size (B) | Max. Pressure | Material | For Use With | Each | |
NPT Female × BSPT Male | ||||||||
|---|---|---|---|---|---|---|---|---|
| 3/4 | 12 | 3/4 | 12 | 3,500 psi @ 72° F | Galvanized Steel | Air, Hydraulic Fluid, Oil, Water | 00000000 | 000000 |
High-Purity PVDF Pipe Fittings for Corrosive Chemicals
Made of PVDF that’s finished to a 12 Ra smoothness, these fittings handle some of the harshest chemicals without leaching contaminants into your line. They won’t accumulate particles and are easy to clean, thanks to their smoothness. Comparable to Kynar, these fittings handle most organic solvents that would dissolve CPVC, and chlorine or nitric acid that would weaken polypropylene. You can use them at higher temperatures than CPVC and polypropylene. These fittings meet UL 94 V-0 and FM standards for flame retardance. They’re also FDA compliant for direct contact with food, and they meet ASTM requirements for dimensions and tolerances.
Connect them to pipe with socket fusion welding for a strong, permanent bond. Use a socket fusion tool with a heater bushing (sold separately) that matches your pipe size.
For technical drawings and 3-D models, click on a part number.
- For Use With: Chlorine, Deionized Water, Hydrochloric Acid, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Solvents
- Temperature Range: -40° to 270° F
- Specifications Met: ASTM D3261, FDA Compliant 21 CFR 177.2510, FM 4910, UL 94 V-0
- Pipe Nipples and Pipe: Use SDR 21 PVDF Plastic
- Flanges: Use PVDF Plastic
Union connectors separate into three pieces, so you can access your line without unthreading pipe connections.
| Pipe Size | Socket Dp. | Material | Color | Max. Pressure | Each | |
| 3/4 | 5/8" | PVDF Plastic | White | 230 psi @ 72° F | 0000000 | 0000000 |
- For Use With: Chlorine, Deionized Water, Hydrochloric Acid, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Solvents
- Temperature Range: -40° to 270° F
- Specifications Met: ASTM D3222, FDA Compliant 21 CFR 177.2510, FM 4910, UL 94 V-0
- Seal Material: Viton® Fluoroelastomer Rubber
- Seat Material: PTFE Plastic
Add a ball valve to control the flow in your line.
| Pipe Size | Flow Coefficient (Cv) | Vacuum Rating, in. of Hg | Port Type | End-to-End Lg. | Color | Max. Pressure | Each | |
PVDF Plastic | ||||||||
|---|---|---|---|---|---|---|---|---|
| 3/4 | 28 | 29.92 | Full | 4 9/32" | White | 230 psi @ 72° F | 0000000 | 0000000 |
| Includes | Each | |
| 5 Bushing Sets (1 each in 1/2, 3/4, 1, 1 1/2, and 2 Pipe Sizes) | 00000000 | 0000000 |
| For Pipe Size | Each | |
| 3/4 | 00000000 | 0000000 |