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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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Low-Pressure Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
NPTF (Dryseal) threads, NPSC (National Pipe Straight Coupling) threads, and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
Plugs with Hex Drive
- For Use With:
NPT, BSPP, and Metric: Air, Natural Gas, Oil, Steam, Water
NPTF: Air, Natural Gas, Steam, Water - Pressure Class:
NPT: 150 - Specifications Met:
BSPP and Metric: DIN 908 - Pipe Nipples and Pipe:
NPT: Use Schedule 40 steel
Pipe Size | Drive Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPTF Male Hollow with Magnet | ||||||
|---|---|---|---|---|---|---|
| 1/8 | 3/16" | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
| 1/4 | 1/4" | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 0000 |
| 3/8 | 5/16" | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 0000 |
| 1/2 | 3/8" | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 0000 |
| 3/4 | 9/16" | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 0000 |
| 1 | 5/8" | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 0000 |
Plugs with External Hex Drive
- For Use With:
Solid: Air, Steam, Oil, Water, Natural Gas
Solid with Magnet: Air, Steam, Water, Natural Gas - Specifications Met:
BSPP and Metric with Washer: DIN 910
BSPT: DIN 909
| Thread Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Material | Each | |
Metric Male | ||||||
|---|---|---|---|---|---|---|
| M12 × 1.25 mm | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 000000 |
| M14 × 1.25 mm | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
| M14 × 1.5 mm | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
| M18 × 1.5 mm | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
UNF Male | ||||||
| 3/8"-24 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
| 1/2"-20 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 0000 |
| 7/8"-14 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
| 1"-18 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
| 1 1/16"-12 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
| 1 1/8"-12 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
Plugs with External Square Drive
- For Use With:
NPT and BSPT: Air, Natural Gas, Oil, Steam, Water
NPTF: Air, Natural Gas, Steam, Water - Pressure Class:
NPT Iron: 125
BSPT Iron: 150 - Specifications Met:
See table - Pipe Nipples and Pipe:
NPT and BPST: Use Schedule 40 steel
| Pipe Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPTF Male | ||||||
|---|---|---|---|---|---|---|
| 1/8 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
| 1/4 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 0000 |
| 3/8 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 0000 |
| 1/2 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 0000 |
| 3/4 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 0000 |
| 1 | Solid with Magnet | 150 psi @ 72° F | 150 psi @ 250° F | Steel | 0000000 | 00000 |
Low-Pressure Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line. 316 stainless steel fittings have excellent corrosion resistance.
Plugs with magnet attract metal debris that could otherwise damage your system.
NPTF (Dryseal) threads and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
Plugs with Hex Drive
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class:
NPTF: 150 - Specifications Met:
Metric and BSPP: DIN 908 - Pipe Nipples and Pipe:
NPTF: Use Schedule 40 stainless steel - Flanges:
NPTF: Use Class 150 stainless steel
316 Stainless Steel | |||||
|---|---|---|---|---|---|
| Pipe Size | Drive Size | Max. Pressure | Max. Steam Pressure | Each | |
NPTF Male Hollow with Magnet | |||||
| 1/8 | 3/16" | 270 psi @ 72° F | 180 psi @ 360° F | 0000000 | 00000 |
| 1/4 | 1/4" | 270 psi @ 72° F | 180 psi @ 360° F | 0000000 | 0000 |
| 3/8 | 5/16" | 270 psi @ 72° F | 180 psi @ 360° F | 0000000 | 0000 |
| 1/2 | 3/8" | 270 psi @ 72° F | 180 psi @ 360° F | 0000000 | 0000 |
| 3/4 | 9/16" | 270 psi @ 72° F | 180 psi @ 360° F | 0000000 | 0000 |
| 1 | 5/8" | 270 psi @ 72° F | 180 psi @ 360° F | 0000000 | 00000 |
| 1 1/4 | 3/4" | 270 psi @ 72° F | 180 psi @ 360° F | 0000000 | 00000 |
| 1 1/2 | 1" | 270 psi @ 72° F | 180 psi @ 360° F | 0000000 | 00000 |
| 2 | 1" | 270 psi @ 72° F | 180 psi @ 360° F | 0000000 | 00000 |
| 2 1/2 | 1" | 270 psi @ 72° F | 180 psi @ 360° F | 0000000 | 000000 |
Push-On Retaining Caps
1050 Spring Steel
400 Series Stainless Steel
Plastic
Use these caps to hold components in place and protect shaft ends. Install these caps with a hammer or push them into place by hand.
Corrosion-resistant-coated finish is more corrosion resistant in wet environments than zinc plated finish. Also known as black luster.
Nickel-plated finish has excellent corrosion resistance and a decorative appearance.
Zinc-plated finish is corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
| For OD | OD | Ht. | Insert Material | Min. Hardness | Temperature Range, °F | Magnetic Properties | Pkg. Qty. | Pkg. | |
Black Corrosion-Resistant-Coated 1050 Spring Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/4" | 9/16" | 7/32" | Steel | Not Rated | __ | Magnetic | 5 | 000000000 | 00000 |
| 5/16" | 5/8" | 1/4" | Steel | Not Rated | __ | Magnetic | 5 | 000000000 | 0000 |
| 3/8" | 3/4" | 9/32" | Steel | Not Rated | __ | Magnetic | 5 | 000000000 | 00000 |
| 1/2" | 15/16" | 21/64" | Steel | Not Rated | __ | Magnetic | 5 | 000000000 | 00000 |
Nickel-Plated 1050 Spring Steel | |||||||||
| 1/4" | 1/2" | 7/32" | Steel | Rockwell C13 | __ | Magnetic | 25 | 000000000 | 0000 |
| 3/8" | 3/4" | 9/32" | Steel | Rockwell C13 | __ | Magnetic | 25 | 000000000 | 0000 |
Zinc-Plated 1050 Spring Steel | |||||||||
| 5/16" | 9/16" | 19/64" | Steel | Rockwell C44 | __ | Magnetic | 25 | 000000000 | 0000 |
| 1/2" | 15/16" | 21/64" | Steel | Rockwell C38 | __ | Magnetic | 10 | 000000000 | 0000 |
| 5/8" | 1 3/16" | 27/64" | Steel | Rockwell C38 | __ | Magnetic | 10 | 000000000 | 0000 |
400 Series Stainless Steel | |||||||||
| 1/8" | 27/64" | 1/8" | 18-8 Stainless Steel | Rockwell C49 | __ | May Be Mildly Magnetic | 10 | 000000000 | 0000 |
| 3/16" | 1/2" | 5/32" | 18-8 Stainless Steel | Rockwell C49 | __ | May Be Mildly Magnetic | 25 | 000000000 | 0000 |
| 1/4" | 41/64" | 13/64" | 18-8 Stainless Steel | Rockwell C49 | __ | May Be Mildly Magnetic | 10 | 000000000 | 0000 |
| 3/8" | 25/32" | 15/64" | 18-8 Stainless Steel | Rockwell C49 | __ | May Be Mildly Magnetic | 10 | 000000000 | 00000 |
Black Plastic | |||||||||
| 5/32" | 21/32" | 23/64" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 50 | 000000000 | 00000 |
| 3/16" | 21/32" | 23/64" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 50 | 000000000 | 00000 |
| 1/4" | 27/32" | 23/64" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 50 | 000000000 | 00000 |
| 5/16" | 27/32" | 29/64" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 25 | 000000000 | 00000 |
| 3/8" | 55/64" | 15/32" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 25 | 000000000 | 0000 |
| 7/16" | 53/64" | 7/16" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 10 | 000000000 | 0000 |
| 1/2" | 1 5/16" | 41/64" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 10 | 000000000 | 0000 |
| 5/8" | 1 5/16" | 41/64" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 10 | 000000000 | 0000 |
White Plastic | |||||||||
| 1/8" | 21/32" | 23/64" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 10 | 000000000 | 00000 |
| 3/16" | 21/32" | 11/32" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 25 | 000000000 | 0000 |
| 3/8" | 55/64" | 15/32" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 25 | 000000000 | 0000 |
Red Plastic | |||||||||
| 5/16" | 55/64" | 15/32" | Steel | Rockwell C45 | -90° to 150° | Magnetic | 25 | 000000000 | 0000 |