NH/NST Pipe Fittings | McMaster-Carr

Filter by

System of Measurement

Pipe Size

Fire Hose Trade Size

Gender

Fitting Type

Connects To

Lug Style

Fitting Connection

Material

Specifications Met

Length

Shape

For Use With

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

RoHS

Compliant with Exemptions

Not Compliant

Maximum Temperature

100° F to 249° F

Drive Style

External Pentagon

Number of Outlets

Color

Minimum Temperature

Connection Port

Flow Coefficient (Cv)

0.9

Forward

How can we improve?

74 Products

Fire-Fighting Hose Fittings

Connect these fittings to fire hydrants and washdown equipment. Made of brass, they have good corrosion resistance. Some have a hex in the middle so you can tighten them with a wrench.

Straight Adapters, NH/NST Male Threaded Hose × NPSH Male Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Fire-Fighting Hose Fittings , NPSH Thread, Adapter, Straight, Male, Threaded Fitting Connection, NH/NST Thread.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Male NPSH (National Pipe Straight Hose) threads are compatible with female NPSH threads.

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	6523T51	000000

Straight Adapters, NH/NST Male Threaded Hose × NPSH Female Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Fire-Fighting Hose Fittings , NPSH Thread, NH/NST Thread, Male, Adapter, Threaded Fitting Connection, Straight, Female.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Female NPSH threads are compatible with male NPSH, NPT, NPTF, and NPSM threads.

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	6523T12	000000

Straight Adapters, NH/NST Male Threaded Hose × BIT Male Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Fire-Fighting Hose Fittings , NH/NST Thread, BIT Thread, Straight, Threaded Fitting Connection, Adapter, Male.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

BIT (British Instantaneous Thread) threads are commonly used in the United Kingdom, Ireland, India, Hong Kong, and parts of Canada. They’re also known as John Morris couplings.

Fire Hose Trade Size	Pipe Size	Material		Each
2 1/2	2 1/2	Brass	6523T73	0000000

Straight Adapters, NH/NST Male Threaded Hose × NPT Male Threaded Pipe

Image of Product. Front orientation. Fire Hose and Fittings. Fire-Fighting Hose Fittings , Straight, Adapter, NPT Thread, Threaded Fitting Connection, Male, NH/NST Thread.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size	Pipe Size	Material		Each
3/4	3/4	Brass	6523T61	000000
1	1	Brass	6523T17	00000
1 1/2	1 1/2	Brass	6523T11	00000
2 1/2	2 1/2	Brass	6523T14	00000
3	3	Brass	6523T57	000000

Straight Adapters, NH/NST Male Threaded Hose × NPT Female Threaded Pipe

Image of Product. Front orientation. Fire Hose and Fittings. Fire-Fighting Hose Fittings , Male, Adapter, Straight, NPT Thread, NH/NST Thread, Threaded Fitting Connection, Female.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size	Pipe Size	Material		Each
1	1	Brass	6523T103	000000
1 1/2	1 1/2	Brass	6523T16	00000
2 1/2	2 1/2	Brass	6523T19	000000

Straight Adapters, NPSH Male Threaded Hose × NH/NST Female Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Fire-Fighting Hose Fittings , NPSH Thread, Female, Adapter, Threaded Fitting Connection, Male, NH/NST Thread, Straight.

Male NPSH (National Pipe Straight Hose) threads are compatible with female NPSH threads.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	6523T25	000000

Straight Adapters, BIT Male Threaded Hose × NH/NST Female Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Fire-Fighting Hose Fittings , Adapter, Female, Straight, Male, Threaded Fitting Connection, BIT Thread, NH/NST Thread.

BIT (British Instantaneous Thread) threads are commonly used in the United Kingdom, Ireland, India, Hong Kong, and parts of Canada. They’re also known as John Morris couplings.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size	Pipe Size	Material		Each
2 1/2	2 1/2	Brass	6523T71	0000000

Straight Adapters, NPT Male Threaded Pipe × NH/NST Female Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Fire-Fighting Hose Fittings , Female, Male, NH/NST Thread, Adapter, NPT Thread, Straight, Threaded Fitting Connection.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size	Pipe Size	Material		Each
1	1	Brass	6523T102	000000
1 1/2	1 1/2	Brass	6523T52	00000
2 1/2	2 1/2	Brass	6523T55	000000
3	3	Brass	6523T58	000000

Straight Reducing Adapters, NH/NST Male Threaded Hose × NPT Male Threaded Pipe

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Fire-Fighting Hose Fittings , Reducing-Adapter Fitting, NH/NST Thread, Straight, Threaded Fitting Connection, Male, NPT Thread.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size (A)	Pipe Size (B)	Material		Each
1 1/2	1	Brass	6523T33	000000
1 1/2	2	Brass	6523T28	00000
1 1/2	2 1/2	Brass	6523T13	000000
2 1/2	1 1/2	Brass	6523T35	000000
2 1/2	2	Brass	6523T46	00000
2 1/2	3	Brass	6523T56	000000

Straight Reducing Adapters, NH/NST Male Threaded Hose × NPT Female Threaded Pipe

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Fire-Fighting Hose Fittings , NH/NST Thread, Straight, Reducing-Adapter Fitting, NPT Thread, Male, Female, Threaded Fitting Connection.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size (A)	Pipe Size (B)	Material		Each
1 1/2	1	Brass	6523T43	000000
1 1/2	2	Brass	6523T104	00000
2 1/2	1 1/2	Brass	6523T45	00000
2 1/2	2	Brass	6523T49	00000

Straight Reducing Adapters, NPT Male Threaded Pipe × NH/NST Female Threaded Hose

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Fire-Fighting Hose Fittings , NPT Thread, Straight, Female, Reducing-Adapter Fitting, NH/NST Thread, Threaded Fitting Connection, Male.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size (B)	Pipe Size (A)	Material		Each
3/4	1 1/2	Brass	6523T64	000000
2 1/2	1 1/2	Brass	6523T36	000000

Fire Hydrants

Fight fires in areas around your facility that city-installed hydrants don’t reach. These hydrants are dry-barrel, the most common type of hydrant, which means they drain water when not in use. Not only does this prevent freezing, but it keeps water from spurting out if a vehicle hits these hydrants. And if they get hit, they won’t need much repair—their safety flange and safety stem coupling break without shattering. That means the hydrant comes off cleanly, minimizing damage to the main body and stem. To repair, just replace the flange and coupling using the repair kit (sold separately).

These hydrants must be installed and maintained according to National Fire Protection Association (NFPA) Standards. If your main line is below 5 ft., attach a stem extension (sold separately). An extension can also raise your hydrant above the ground.

These hydrants are FM approved and meet AWWA C-502 standards for the durability, reliability, and safety of dry-barrel fire hydrants. Connect them to the plain end of a water main line with their mechanical joint connection. The fitting will maintain a tight seal through normal underground movement and temperature changes.

	Fire Hose Trade Size (No. of Outlets)	Bury Dp., ft.	Ht. Above Ground	Drive Size	Drive Style	Valve Opening Direction	Body Material	Color	Valve Opening Size	Operating Pressure, psi	Max. Temp., ° F	Specs. Met	Certification		Each
Mechanical Joint Pipe Inlet × NH/NST Female Hose Outlet



	6	2 1/2 (2) 4 1/2 (1)	5	32"	1 1/2"	External Pentagon	Counterclockwise	Epoxy-Coated Ductile Iron	Red	5 1/4"	200	130	AWWA C502	FM Approved	7467N11	000000000

Accessories for Fire Hydrants

Fire Hydrant Stem Extension Kits

				6" Long		12" Long
Includes	Standpipe Dia.	Body Material	Color		Each		Each
Stem, Stem Coupling, Standpipe, Two Standpipe Flanges, Gasket, Mounting Hardware	7 13/16"	Epoxy-Coated Ductile Iron	Black	7467N13	0000000	7467N14	0000000

Includes		Each
Safety Stem Coupling, Safety Flange, Gasket, Mounting Hardware	7467N12	0000000

Rocker-Lug Fire-Fighting Hose Fittings

The rocker lugs on these fittings allow for easy gripping, so you can quickly connect to fire hydrants and washdown equipment. Tighten with a hook-style spanner wrench (sold separately).

Straight Adapters, NH/NST Male Threaded Hose × NPT Male Threaded Hose

Image of Product. Back orientation. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , Straight, NPT Thread, Male, Threaded Fitting Connection, Adapter, NH/NST Thread.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Aluminum—Aluminum fittings are more lightweight than brass fittings. They have good abrasion and corrosion resistance.

	Pipe Size		Each
Aluminum



	1 1/2	1 1/2	6524T28	000000

Straight Adapters, NH/NST Male Threaded Hose × NPSH Female Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , Male, Straight, NPSH Thread, NH/NST Thread, Threaded Fitting Connection, Female, Adapter.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Female NPSH threads are compatible with male NPSH, NPT, NPTF, and NPSM threads.

Brass—Brass fittings are softer than aluminum fittings, so they’re easier to thread together. They have good corrosion resistance.

	Pipe Size		Each
Brass



	1 1/2	1 1/2	6524T17	000000

Straight Adapters, NPT Male Threaded Pipe × NH/NST Female Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , Male, NH/NST Thread, Female, Adapter, Threaded Fitting Connection, Straight, NPT Thread.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Brass—Brass fittings are softer than aluminum fittings, so they’re easier to thread together. They have good corrosion resistance.

	Pipe Size		Each
Brass



	1 1/2	1 1/2	6524T19	000000


	2 1/2	2 1/2	6524T27	00000

Straight Adapters (Swivels Until Tightened), NPT Female Threaded Hose × NH/NST Female Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , NH/NST Thread, NPT Thread, Straight, Adapter, Female, Threaded Fitting Connection.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fittings that swivel until tightened rotate to help prevent kinking during installation.

Aluminum—Aluminum fittings are more lightweight than brass fittings. They have good abrasion and corrosion resistance.

	Pipe Size		Each
Aluminum



	2 1/2	2 1/2	6524T44	0000000

Straight Connectors (Swivels Until Tightened), NH/NST Female Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , Female, Straight, Connector Fitting, NH/NST Thread, Threaded Fitting Connection.

Fittings that swivel until tightened rotate to help prevent kinking during installation.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Aluminum—Aluminum fittings are more lightweight than brass fittings. They have good abrasion and corrosion resistance.

		Each
Aluminum



	1 1/2	6524T42	0000000

Straight Reducing Adapters, NH/NST Male Threaded Hose × NPT Male Threaded Hose

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , Straight, Threaded Fitting Connection, NPT Thread, Reducing-Adapter Fitting, NH/NST Thread, Male.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Aluminum—Aluminum fittings are more lightweight than brass fittings. They have good abrasion and corrosion resistance.

	Pipe Size (B)		Each
Aluminum



	2 1/2	2	6524T29	000000

Straight Reducing Adapters, NH/NST Male Threaded Hose × NH/NST Female Threaded Hose

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , Threaded Fitting Connection, Straight, NH/NST Thread, Reducing-Adapter Fitting, Female, Male.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Brass—Brass fittings are softer than aluminum fittings, so they’re easier to thread together. They have good corrosion resistance.

Aluminum—Aluminum fittings are more lightweight than brass fittings. They have good abrasion and corrosion resistance.

	Fire Hose Trade Size
	(A)	(B)		Each
Brass



		1	1 1/2	6524T15	000000


		1	2 1/2	6524T16	00000
		1 1/2	2 1/2	6524T22	00000
		2 1/2	1 1/2	6524T25	00000


		Aluminum



				1	1 1/2	6524T33	00000


				1 1/2	1	6524T32	00000
				1 1/2	2 1/2	6524T36	00000
				2 1/2	4 1/2	6524T38	000000

Straight Reducing Adapters, NH/NST Male Threaded Hose × NPSH Female Threaded Hose

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , Straight, Reducing-Adapter Fitting, Male, NH/NST Thread, NPSH Thread, Female, Threaded Fitting Connection.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Female NPSH threads are compatible with male NPSH, NPT, NPTF, and NPSM threads.

Brass—Brass fittings are softer than aluminum fittings, so they’re easier to thread together. They have good corrosion resistance.

	Pipe Size (B)		Each
Brass



	1 1/2	2 1/2	6524T14	000000

Straight Reducing Adapters, NPT Male Threaded Pipe × NH/NST Female Threaded Hose

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , NPT Thread, Straight, Reducing-Adapter Fitting, Male, Female, Threaded Fitting Connection, NH/NST Thread.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Brass—Brass fittings are softer than aluminum fittings, so they’re easier to thread together. They have good corrosion resistance.

	Pipe Size (A)		Each
Brass



	1 1/2	1	6524T13	000000


	2 1/2	1	6524T18	00000
	2 1/2	2	6524T26	00000

Straight Reducing Adapters, NPT Male Threaded Hose × NH/NST Female Threaded Hose

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , Male, Female, Threaded Fitting Connection, Straight, Reducing-Adapter Fitting, NPT Thread, NH/NST Thread.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Aluminum—Aluminum fittings are more lightweight than brass fittings. They have good abrasion and corrosion resistance.

	Pipe Size (A)		Each
Aluminum



	2 1/2	2	6524T37	000000


	4 1/2	4	6524T39	000000

Straight Reducing Adapters, NPSH Male Threaded Hose × NH/NST Female Threaded Hose

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Rocker-Lug Fire-Fighting Hose Fittings , Male, NH/NST Thread, Straight, NPSH Thread, Reducing-Adapter Fitting, Threaded Fitting Connection, Female.

Male NPSH (National Pipe Straight Hose) threads are compatible with female NPSH threads.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Brass—Brass fittings are softer than aluminum fittings, so they’re easier to thread together. They have good corrosion resistance.

	Pipe Size (A)		Each
Brass



	2 1/2	1 1/2	6524T24	000000

Pin-Lug Fire-Fighting Hose Fittings

The pin lugs on these fittings allow for easy gripping, so you can quickly connect to fire hydrants and washdown equipment. Tighten with a hook-style spanner wrench (sold separately). All are brass for good corrosion resistance.

Straight Connectors (Swivels Until Tightened), NH/NST Female Threaded Hose

Image of Product. Front orientation. Connector Fitting. Pin-Lug Fire-Fighting Hose Fittings.

Fittings that swivel until tightened rotate to help prevent kinking during installation.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size	Material		Each
1 1/2	Brass	6494T21	0000000

Straight Reducing Adapters, NH/NST Male Threaded Hose × NH/NST Female Threaded Hose

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Pin-Lug Fire-Fighting Hose Fittings, Threaded Fitting Connection, Straight, NH/NST Thread, Reducing-Adapter Fitting, Female, Male.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size
(A)	(B)	Material		Each
1	1 1/2	Brass	6494T24	000000
1 1/2	2 1/2	Brass	6494T25	00000

Straight Reducing Adapters, NPT Male Threaded Pipe × NH/NST Female Threaded Hose

Image of Product. Front orientation. Contains Annotated. Reducing-Adapter Fitting. Pin-Lug Fire-Fighting Hose Fittings, NPT Thread, Male, Female, NH/NST Thread.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Pipe Size (A)	Fire Hose Trade Size (B)	Material		Each
3/4	2 1/2	Brass	6494T28	000000
1	1 1/2	Brass	6494T14	00000
1	2 1/2	Brass	6494T15	00000
1 1/2	2 1/2	Brass	6494T26	00000
2	2 1/2	Brass	6494T27	00000

Straight Adapters, NH/NST Male Threaded Hose × NPT Female Threaded Pipe

Image of Product. Front orientation. Fire Hose and Fittings. Pin-Lug Fire-Fighting Hose Fittings, Male, Straight, NH/NST Thread, Threaded Fitting Connection, Adapter, NPT Thread, Female.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	6494T12	000000

Straight Adapters, NH/NST Male Threaded Hose × NPSH Female Threaded Pipe

Image of Product. Front orientation. Fire Hose and Fittings. Pin-Lug Fire-Fighting Hose Fittings, NPSH Thread, Female, NH/NST Thread, Threaded Fitting Connection, Male, Straight, Adapter.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	6494T11	000000

Straight Adapters (Swivels Until Tightened), NH/NST Female Threaded Hose × NPT Female Threaded Pipe

Image of Product. Front orientation. Fire Hose and Fittings. Pin-Lug Fire-Fighting Hose Fittings, Adapter, NH/NST Thread, Straight, NPT Thread, Female, Threaded Fitting Connection.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fittings that swivel until tightened rotate to help prevent kinking during installation.

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	6494T64	000000
2 1/2	2 1/2	Brass	6494T73	000000

Straight Adapters (Swivels Until Tightened), NPT Male Threaded Pipe × NH/NST Female Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Pin-Lug Fire-Fighting Hose Fittings, NPT Thread, Female, Straight, NH/NST Thread, Adapter, Threaded Fitting Connection, Male.

Fittings that swivel until tightened rotate to help prevent kinking during installation.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	6494T61	000000
2 1/2	2 1/2	Brass	6494T63	000000

Straight Adapters, NPSH Male Threaded Pipe × NH/NST Female Threaded Hose

Image of Product. Front orientation. Fire Hose and Fittings. Pin-Lug Fire-Fighting Hose Fittings, NPSH Thread, NH/NST Thread, Threaded Fitting Connection, Female, Adapter, Male, Straight.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fire Hose Trade Size	Pipe Size	Material		Each
1 1/2	1 1/2	Brass	6494T13	000000

Straight Reducing Adapters, GHT Male Threaded Hose × NH/NST Female Threaded Hose

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Pin-Lug Fire-Fighting Hose Fittings, Male, Reducing-Adapter Fitting, NH/NST Thread, GHT Thread, Threaded Fitting Connection, Straight, Female.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Garden Hose Trade Size (A)	Fire Hose Trade Size (B)	Material		Each
3/4	1 1/2	Brass	6494T22	000000
3/4	2 1/2	Brass	6494T23	00000

Straight Reducing Adapters (Swivels Until Tightened), NH/NST Female Threaded Hose × NPT Female Threaded Pipe

Image of Product. Front orientation. Contains Annotated. Fire Hose and Fittings. Pin-Lug Fire-Fighting Hose Fittings, Straight, NH/NST Thread, Reducing-Adapter Fitting, Threaded Fitting Connection, NPT Thread, Female.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Fittings that swivel until tightened rotate to help prevent kinking during installation.

Pipe Size (B)	Fire Hose Trade Size (A)	Material		Each
2	2 1/2	Brass	6494T66	0000000

Straight Reducing Adapters (Swivels Until Tightened), NPT Male Threaded Pipe × NH/NST Female Threaded Hose

Image of Product. Front orientation. Contains Annotated. Reducing-Adapter Fitting. Pin-Lug Fire-Fighting Hose Fittings, NH/NST Thread, Female, Male, Swivels Until Tightened, NPT Thread.

Fittings that swivel until tightened rotate to help prevent kinking during installation.

NH/NST (National Hose/National Standard) threads are only compatible with other NH/NST threads.

Pipe Size (A)	Fire Hose Trade Size (B)	Material		Each
2	2 1/2	Brass	6494T72	0000000