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 Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line. 304 stainless steel fittings have very good corrosion resistance.
Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration. Locknuts that meet DIN 431 comply with international standards for pipe fitting locknut dimensions.
NPTF (Dryseal) threads and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class:
NPSL: 150 - Fabrication:
NPSL: Heat Treated - Specifications Met:
NPSL: ANSI/MSS SP-114, ASTM A351
BSPP: DIN 431 - Pipe Nipples and Pipe:
NPSL: Use Schedule 40 stainless steel - Flanges:
NPSL: Use Class 150 stainless steel
304 Stainless Steel | ||||
|---|---|---|---|---|
Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
BSPP Female | ||||
| 5/8 | Not Rated | Not Rated | 00000000 | 00000 |
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 zinc-plated steel, which have better corrosion resistance than plain steel fittings. BSPP and metric male threads have either a gasket, or a gasket and washer, to prevent leaks.
(SAE Straight) Male Threads
with Gasket and Washer
- For Use With: See table
- Specifications Met: See table
| Pipe Size (A) | Thread Size (B) | Max. Pressure | Material | For Use With | Specifications Met | Each | |
BSPP Male × Metric Male | |||||||
|---|---|---|---|---|---|---|---|
| 5/8 | M22 × 1.5 mm | 4,000 psi @ 72° F | Zinc Plated Steel | Air, Diesel Fuel, Gasoline, Hydraulic Fluid, Oil, Water | DIN 7631, ISO 1179, ISO 6149, ISO 8434-6, ISO 9974 | 00000000 | 000000 |
Male Threads with
Gasket and Washer
- For Use With: See table
- Specifications Met: See table
| Pipe Size | Plug Construction | Max. Pressure | Material | For Use With | Specifications Met | Washer Material | Each | |
BSPP Male | ||||||||
|---|---|---|---|---|---|---|---|---|
| 5/8 | Hollow | 3,500 psi @ 72° F | Zinc Plated Steel | Air, Hydraulic Fluid, Oil, Water | ISO 1179, ISO 8434-6 | Steel | 00000000 | 00000 |
BSPT Male | ||||||||
| 5/8 | Solid | 3,500 psi @ 72° F | Zinc Plated Steel | Air, Hydraulic Fluid, Oil, Water | DIN EN 10226-1, ISO 7-1 | __ | 00000000 | 00000 |
Plastic Pipe Fittings for Oil
Made of corrosion-resistant plastic, these fittings won’t deteriorate when used in oil applications. They also have high strength and impact resistance. Apply a non-hardening, plastic-compatible sealant to the male threads to prevent leaks. Tape or sealants with PTFE are not recommended for plastic-to-plastic threaded connections. When making a threaded connection be careful not to overtighten the threads. To prevent cracks and leaks, finger tighten the fitting, then wrench-tighten one to two turns.
Warning: Never use plastic pipe fittings and pipe with compressed air or gas.
- For Use With: Oil
- Maximum Temperature: 140° F
| Pipe Size | Material | Color | Maximum Pressure | Pkg. Qty. | Pkg. | |
BSPP | ||||||
|---|---|---|---|---|---|---|
| 5/8 | Polyethylene Plastic | Red | Not Rated | 10 | 0000000 | 00000 |
Push-to-Connect Tube Fittings for Drinking Water
- Temperature Range: 35° to 150° F
- Tubing: See table
- Specifications Met: NSF/ANSI 61
Made of moisture-resistant acetal, these fittings won't absorb water and lose strength, even in high-humidity environments. Also known as instant fittings, they connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. To disconnect, push on the release ring and pull the tubing out of the fitting. All meet NSF/ANSI 61 for use in drinking water systems.
For Tube | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Tube OD | Pipe Size | Material | Color | Release Ring Color | Max. Pressure | Material | Each | |
BSPP Threads | ||||||||
| 10mm | 5/8 | Acetal Plastic | Black | Black | 150 psi @ 72° F | Nylon Plastic, Polyethylene Plastic | 00000000 | 00000 |
Wing Nut Expansion Plugs
Twist the wing nut on these plugs to expand the seal and close off pipe openings. Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.
Style A aren’t recommended for pressure testing, so they’re often used as a dust cover. Plugs with a stainless steel plate have excellent corrosion resistance.
For Pipe | Max. Back Pressure | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | ID | Air, psi | Water, ft. of head | O'all Ht. | Temp. Range, °F | Seal Material | Each | |
Style A | ||||||||
Stainless Steel Plate | ||||||||
| 5/8 | 0.57"-0.67" | 10 | 24 | 1 11/16" | 0° to 175° | Neoprene Rubber | 0000000 | 000000 |
Hex-Nut Expansion Plugs
Tighten the nut on these plugs to expand the seal and close off pipe openings. Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.
Plugs with a stainless steel plate have excellent corrosion resistance.
For Pipe | Max. Back Pressure | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | ID | Air, psi | Water, ft. of head | O'all Ht. | Temp. Range, °F | Seal Material | Each | |
Style B | ||||||||
Stainless Steel Plate | ||||||||
| 5/8 | 0.57"-0.67" | 10 | 24 | 1 11/16" | -40° to 250° | Neoprene Rubber | 0000000 | 000000 |
Quick-Snap Expansion Plugs
Turn the cam handle to expand the seal, then snap the handle down to hold it in place and close off pipe openings. Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.
Plugs with a stainless steel plate have excellent corrosion resistance.
For Pipe | Max. Back Pressure | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | ID | Air, psi | Water, ft. of head | O'all Ht. | Temp. Range, °F | Seal Material | Each | |
Brass Handle | ||||||||
Stainless Steel Plate | ||||||||
| 5/8 | 0.62"-0.67" | 10 | 24 | 1 3/8" | -40° to 250° | Neoprene Rubber | 0000000 | 000000 |
Stainless Steel Handle | ||||||||
Stainless Steel Plate | ||||||||
| 5/8 | 0.62"-0.67" | 10 | 24 | 1 3/8" | -40° to 250° | Neoprene Rubber | 0000000 | 00000 |
Expansion Plugs with Bypass
Use the bypass tube on these plugs to add air, water, and other fluid to your pipeline or to relieve pressure while testing. The seal expands to temporarily close off pipe openings. Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.
For Styles A-E and H-L, twist the wing nut to expand the seal.
Styles E and F have a barbed bypass for quick connections to tubing.
For Pipe | Max. Back Pressure | Material | Bypass | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | ID | Air, psi | Water, ft. of head | O'all Ht. | Temp. Range, °F | Seal | For Tube ID | Tube Connection Type | Each | |
Style E | ||||||||||
Stainless Steel Stem | ||||||||||
| 5/8 | 0.60"-0.67" | 10 | 24 | 3 1/2" | -40° to 250° | Neoprene Rubber | 1/4" | Barbed | 0000000 | 0000000 |