ASME B1.20.1 Pipe Locknuts

Filter by

Pipe Size

Material

Fitting Type

Thread Type

Pipe Material

Flange Material

For Use With

Length

Hex Width

System of Measurement

Inch

Pipe Schedule

Specifications Met

Pressure Class

Maximum Pressure @ Temperature

175 psi @ 72° F

200 psi @ 72° F

For Flange Class

150

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

RoHS

Maximum Steam Pressure @ Temperature

125 psi @ 350° F

Forward

How can we improve?

10 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 Iron and Steel Threaded Pipe Fittings

Use these fittings for low-pressure applications in noncorrosive environments.

Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.

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

Locknuts

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class:
NPT: 125
NPSL: 150
Specifications Met:
NPT: ASME B1.20.1, ASME B16.4
NPSL: ASME B16.14
BSPP: DIN 431
Pipe Nipples and Pipe:
NPT, NPSL: Use Schedule 40 steel

NPT Female
Pipe Size	Material		Each
3	Iron	000000000	000000

Low-Pressure Brass and Bronze Threaded Pipe Fittings

Use these fittings in low-pressure flow applications. They have good corrosion resistance. Fittings rated for use with drinking water meet NSF/ANSI 61 safety standards.

Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.

NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.

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

Locknuts

For Use With: See table
Pressure Class: See table
Specifications Met: See table
Pipe Nipples and Pipe: See table
Flanges: See table

				For Pipe		For Flange
Pipe Size	Max. Pressure	Pressure Class	Material	Schedule	Material	Class	Material	For Use With	Specifications Met		Each
NPSL Female
1/8	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	00000
1/4	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	0000
3/8	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	0000
1/2	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	0000
3/4	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	0000
1	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	0000
1 1/4	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	00000
1 1/2	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	00000
2	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	00000