McMaster-Carr

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	Drive Style Drive Style


External Square	Square

	Pipe Size Pipe Size

	Thread Type Thread Type

NPT

NPTF

	For Use With For Use With

	Finish Finish

Galvanized

Black Coated

	Maximum Pressure Maximum Pressure

150 psi @ 72° F

5,000 psi @ 72° F

6,000 psi @ 72° F

	Class Class

150

3000

	Plug Construction Plug Construction

Solid

Hollow

Solid with Magnet

	For Pipe Schedule For Pipe Schedule


40	160

	Length Length

	Specifications Met Specifications Met

SAE

ASTM

ANSI/ASME

	Maximum Steam Pressure Maximum Steam Pressure

	Fabrication Fabrication

Forged

Machined

	Dash Size Dash Size

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72 Products

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.

Low-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings

The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.

For technical drawings and 3-D models, click on a part number.

Plugs with Square Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 150
Specifications Met: SAE J531
Pipe Nipples and Pipe: Use Schedule 40 steel
Flanges: Use Class 150 galvanized steel

NPT Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material		Each
1/8	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	00000
1/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	000
3/8	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	000
1/2	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	000
3/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	000
1	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	0000
1 1/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	0000
1 1/2	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	00000
2	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	00000

Plugs with External Square Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: See table
Specifications Met:
NPT Steel: SAE J531
NPT Iron: ANSI/ASME B1.20.1, ANSI/ASME B16.14, ASTM A126, UL Listed
BSPT: ASTM A197, DIN EN 10226
Pipe Nipples and Pipe: Use Schedule 40 steel
Flanges: Use Class 150 galvanized steel

NPT Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material		Each
1/8	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	00000
1/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	000
3/8	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	000
1/2	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	000
3/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	0000
1	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	0000
1 1/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	00000
1 1/2	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	00000
2	Solid	150 psi @ 72° F	150 psi @ 350° F	Galvanized Steel	00000000	00000

Low-Pressure Galvanized Steel
Threaded Pipe Fittings with Sealant

The male threads on these fittings have a sealant applied for extra leak protection. Fittings are made of galvanized steel, which has fair corrosion resistance. Also known as Class 150 fittings, they are for use in low-pressure applications.

NPTF (Dryseal) threads are compatible with NPT threads.

For technical drawings and 3-D models, click on a part number.

Plugs with Square Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 150
Specifications Met: SAE J531
Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
Flanges: Use Class 150 galvanized steel

NPTF Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure		Each
1/8	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	00000
1/4	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	000
3/8	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	000
1/2	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	000
3/4	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	000
1	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	0000

Plugs with External Square Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 150
Specifications Met: SAE J531
Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
Flanges: Use Class 150 galvanized steel

NPTF Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure		Each
1/8	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	00000
1/4	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	000
3/8	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	000
1/2	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	000
3/4	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	0000
1	Solid	150 psi @ 72° F	150 psi @ 360° F	0000000	0000

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 Square Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Class:
Steel: 150
Iron: 125
Pipe Nipples and Pipe: Use Schedule 40 steel

NPT Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material		Each
1/8	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	00000
1/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	000
3/8	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	000
1/2	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	000
3/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	000
1	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	0000
1 1/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	0000
1 1/2	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	00000
2	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	00000

Plugs with External Square Drive

For Use With:
NPT and BSPT: Air, Natural Gas, Oil, Steam, Water
NPTF: Air, Natural Gas, Steam, Water
Class:
NPT Steel: 125
NPT Iron and BSPT: 150
Specifications Met:
BSPT: DIN EN 10226
Pipe Nipples and Pipe:
NPT and BPST: Use Schedule 40 steel

NPT Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material		Each
1/8	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	00000
1/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	000
3/8	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	000
1/2	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	000
3/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	000
1	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	0000
1 1/4	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	00000
1 1/2	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	00000
2	Solid	150 psi @ 72° F	150 psi @ 350° F	Steel	000000000	00000
NPTF Male
1/8	Solid with Magnet	150 psi @ 72° F	150 psi @ 250° F	Steel	0000000	0000
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	0000

High-Pressure Iron and Steel Threaded Pipe Fittings

These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.

For technical drawings and 3-D models, click on a part number.

Plugs with External Square Drive

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Class: 3000
Specifications Met: ANSI/ASME B16.11, ASTM A105, ANSI/ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 160 steel
Flanges: Use Class 1500 steel

NPT Male
Pipe Size	Dash Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material		Each
1/8	02	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	00000
1/4	04	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	0000
3/8	06	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	0000
1/2	08	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	0000
3/4	12	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	0000
1	16	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	0000
1 1/4	20	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	0000
1 1/2	24	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	0000
2	32	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	00000
2 1/2	40	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	00000
3	48	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	00000000	00000
4	64	Solid	6,000 psi @ 72° F	300 psi @ 360° F	Black-Coated Steel	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 galvanized steel, which has fair corrosion resistance.

NPTF (Dryseal) threads are compatible with NPT threads.

For technical drawings and 3-D models, click on a part number.

Plugs with External Square Drive

For Use With: Air, Hydraulic Fluid, Water
Specifications Met: ASTM A108

NPTF Male
Pipe Size	Dash Size	Plug Construction	Max. Pressure		Each
1/8	02	Hollow	6,000 psi @ 72° F	000000000	00000
1/4	04	Hollow	6,000 psi @ 72° F	000000000	000
3/8	06	Hollow	6,000 psi @ 72° F	000000000	000
1/2	08	Hollow	6,000 psi @ 72° F	000000000	0000
3/4	12	Hollow	6,000 psi @ 72° F	000000000	0000
1	16	Hollow	5,000 psi @ 72° F	000000000	0000

Terms and Conditions and Privacy Policy

How to Identify and Measure Fittings

Low-Pressure Galvanized Ironand Steel Threaded Pipe Fittings

Low-Pressure Galvanized SteelThreaded Pipe Fittings with Sealant

Low-Pressure Iron and Steel Threaded Pipe Fittings

High-Pressure Iron and Steel Threaded Pipe Fittings

Compact Extreme-Pressure Steel Threaded Pipe Fittings

Low-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings

Low-Pressure Galvanized Steel
Threaded Pipe Fittings with Sealant