ASME B16.14 Pipe Plugs | McMaster-Carr

Filter by

System of Measurement

Pipe Size

Fitting Type

Drive Style

Material

Thread Type

Pipe Material

Pressure Class

For Use With

Pipe Schedule

Maximum Pressure @ Temperature

Flange Material

Shape

Gender

Body Shape

Drive Size

Maximum Steam Pressure @ Temperature

Fitting Connection

For Flange Class

DFARS Specialty Metals

Exempt

REACH

Compliant

RoHS

Compliant

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

Yes

Export Control Classification Number (ECCN)

65 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Fitting Type

Adapter

Bridge the gap between pipe with different fitting connections

13 products

Reducing Adapter

Join pipe of different sizes and fitting connections

13 products

Fitting Type

Bushing

Connect pipe of different sizes while taking up less space than reducers

13 products

Reducer

Transition between pipe of different sizes

13 products

Low-Pressure Iron and Steel Threaded Pipe Fittings with Sealant

To prevent leaks in low-pressure lines, the male threads on these fittings have an acrylic sealant already applied for extra protection. Also known as Pressure Class 125 or 150 fittings. Made of either iron or steel, they’re best in noncorrosive environments. Even with sealant, threaded connections can be taken apart for maintenance and repair.

Hex-Drive Plugs

NPT Male

	Construction	Pressure Class	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPT Male



	1 1/4	Solid	150	Steel	150 psi @ 72° F	Not Rated	5245N38	00000


	1 1/2	Solid	150	Steel	150 psi @ 72° F	Not Rated	5245N39	00000
	2	Solid	150	Steel	150 psi @ 72° F	Not Rated	5245N41	00000

Square-Drive Plugs

NPT Male

	Construction	Pressure Class	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPT Male



	1 1/4	Solid	150	Steel	150 psi @ 72° F	Not Rated	5245N45	00000


	2	Solid	150	Steel	150 psi @ 72° F	Not Rated	5245N46	00000

External-Square-Drive Plugs

NPT Male

	Construction	Pressure Class	Body Shape	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPT Male



	1 1/4	Solid	150	Square	Steel	150 psi @ 72° F	Not Rated	5245N28	000000


	1 1/2	Solid	150	Square	Steel	150 psi @ 72° F	Not Rated	5245N29	00000
	2	Solid	150	Square	Steel	150 psi @ 72° F	Not Rated	5245N31	00000
	2 1/2	Hollow	125	Square	Iron	150 psi @ 72° F	Not Rated	5374N39	00000
	3	Hollow	125	Square	Iron	150 psi @ 72° F	Not Rated	5374N41	00000
	4	Hollow	125	Square	Iron	150 psi @ 72° F	Not Rated	5374N42	00000

Medium-Pressure Iron and Steel Threaded Pipe Fittings

With better strength than our low-pressure iron and steel pipe fittings, these can handle medium-pressure applications. They are for use in noncorrosive environments.

Hex-Drive Plugs

Male

NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.

	Pressure Class	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Certification		Each
NPT Male



	1/4	300	Steel	2,000 psi @ 72° F	300 psi @ 550° F	UL Listed	6367N14	00000


	3/8	300	Steel	2,000 psi @ 72° F	300 psi @ 550° F	UL Listed	6367N15	0000
	1/2	300	Steel	2,000 psi @ 72° F	300 psi @ 550° F	UL Listed	6367N16	0000
	3/4	300	Steel	2,000 psi @ 72° F	300 psi @ 550° F	UL Listed	6367N17	0000
	1	300	Steel	2,000 psi @ 72° F	300 psi @ 550° F	UL Listed	6367N18	0000


	NPTF Male



			1 1/4	300	Steel	300 psi @ 72° F	300 psi @ 550° F	—	4627K417	0000

External-Square-Drive Plugs

NPT Male

	Construction	Pressure Class	Body Shape	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Certification		Each
NPT Male



	1/8	Solid	300	Square	Steel	400 psi @ 72° F	300 psi @ 550° F	—	6367N11	00000


	1/4	Solid	300	Square	Steel	400 psi @ 72° F	300 psi @ 550° F	—	6367N12	0000
	3/8	Solid	300	Square	Steel	400 psi @ 72° F	300 psi @ 550° F	—	6367N13	0000
	1/2	Solid	300	Square	Iron	400 psi @ 72° F	300 psi @ 550° F	UL Listed	4627K333	0000
	3/4	Solid	300	Square	Iron	400 psi @ 72° F	300 psi @ 550° F	UL Listed	4627K334	0000
	1	Solid	300	Square	Iron	400 psi @ 72° F	300 psi @ 550° F	UL Listed	4627K335	0000
	1 1/4	Solid	300	Square	Iron	400 psi @ 72° F	300 psi @ 550° F	UL Listed	4627K336	00000
	1 1/2	Solid	300	Square	Iron	400 psi @ 72° F	300 psi @ 550° F	UL Listed	4627K337	00000
	2	Solid	300	Square	Iron	400 psi @ 72° F	300 psi @ 550° F	UL Listed	4627K338	00000
	2 1/2	Solid	300	Square	Iron	400 psi @ 72° F	300 psi @ 550° F	UL Listed	4627K416	00000

Premium Low-Pressure Stainless Steel Threaded Pipe Fittings

Unlike other stainless steel fittings, these are cast in the U.S. for superior quality. As another marker of quality, they come with a certificate with a traceable lot number and test report that guarantees material composition. All fittings except plugs adhere to ANSI/MSS SP-114 standards for heat treating, material thickness, and marking. It’s the highest quality standard for Pressure Class 150 low-pressure stainless steel fittings. They also meet either ASTM A351 or A479 requirements for parts that will be used in pressure systems. These stainless steel fittings are more corrosion resistant than steel fittings, and almost as strong.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Hex-Drive Plugs

Male

NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.

316 Stainless Steel—Fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.

			316 Stainless Steel
	Pipe Size	Pressure Class	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPTF Male



		1/4	150	270 psi @ 72° F	150 psi @ 350° F	5288N45	00000


		3/8	150	270 psi @ 72° F	150 psi @ 350° F	5288N46	0000
		1/2	150	270 psi @ 72° F	150 psi @ 350° F	5288N47	0000
		3/4	150	270 psi @ 72° F	150 psi @ 350° F	5288N48	00000
		1	150	270 psi @ 72° F	150 psi @ 350° F	5288N49	00000
		1 1/4	150	270 psi @ 72° F	150 psi @ 350° F	5288N51	00000
		1 1/2	150	270 psi @ 72° F	150 psi @ 350° F	5288N52	00000
		2	150	270 psi @ 72° F	150 psi @ 350° F	5288N53	00000

External-Square-Drive Plugs

Male

NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.

					316 Stainless Steel
	Pipe Size	Construction	Pressure Class	Body Shape	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPTF Male



		1/4	Solid	150	Square	270 psi @ 72° F	150 psi @ 350° F	5288N27	00000


		3/8	Solid	150	Square	270 psi @ 72° F	150 psi @ 350° F	5288N28	0000

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.

Bushing Straight Reducing Adapters


Male x Female	Male x Female

	Pipe Size
	(A)	(B)	Pressure Class	Body Shape	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPT Male × NPT Female



		1 1/4	3/8	125	Hex	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	4638K061	00000


		1 1/2	3/8	125	Hex	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	4638K063	00000
		1 1/2	1/2	125	Hex	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	4638K062	0000
		2	1/2	125	Hex	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	4638K064	00000
		2	3/4	125	Hex	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	4638K065	00000
		2 1/2	1 1/2	125	Hex	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	4638K058	00000
		3	2	125	Hex	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	4638K059	00000
		3	2 1/2	125	Hex	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	4638K06	00000

External-Square-Drive Plugs

Threaded

Fitting

Connection, Male

	Construction	Pressure Class	Body Shape	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Certification		Each
NPT Male



	2 1/2	Hollow	125	Square	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	UL Listed	4638K934	000000


	3	Hollow	125	Square	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	UL Listed	4638K935	00000
	3 1/2	Hollow	125	Square	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	UL Listed	4638K936	00000
	4	Hollow	125	Square	Galvanized Iron	125 psi @ 72° F	125 psi @ 350° F	UL Listed	4638K939	000000

180° Bend Connectors

Image of Product. Front orientation. Pipe Traps. Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings.

180° bend connectors are also known as U-bends.

	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Certification	Shape		Each
NPT Female



	1 1/2	Galvanized Iron	150 psi @ 72° F	150 psi @ 350° F	UL Listed	180° Bend	4638K556	0000000


	2	Galvanized Iron	150 psi @ 72° F	150 psi @ 350° F	UL Listed	180° Bend	4638K557	000000

Locknuts

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

	Finished Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPSL Female



	1 1/4	Galvanized Iron	Not Rated	Not Rated	4638K617	000000


	1 1/2	Galvanized Iron	Not Rated	Not Rated	4638K618	00000
	2	Galvanized Iron	Not Rated	Not Rated	4638K619	00000

Low-Pressure Galvanized Iron and 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 iron or steel, which have fair corrosion resistance. Also known as Pressure Class 125 or 150 fittings, they are for use in low-pressure applications.

Hex-Drive Plugs

NPTF Male

NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.

	Pressure Class	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPTF Male



	1 1/4	150	Galvanized Steel	150 psi @ 72° F	Not Rated	1162T24	000000


	1 1/2	150	Galvanized Steel	150 psi @ 72° F	Not Rated	1162T25	00000
	2	150	Galvanized Steel	150 psi @ 72° F	Not Rated	1162T26	00000

External-Square-Drive Plugs

NPTF Male

NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.

	Construction	Pressure Class	Body Shape	Material	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPTF Male



	1 1/2	Solid	150	Square	Galvanized Steel	150 psi @ 72° F	Not Rated	1162T12	000000


	2	Solid	150	Square	Galvanized Steel	150 psi @ 72° F	Not Rated	1162T13	00000

Premium Medium-Pressure Stainless Steel Threaded Pipe Fittings

Unlike other stainless steel fittings, these are cast in the U.S. for superior quality. As another marker of quality, they come with a certificate with a traceable lot number and test report that guarantees material composition. All fittings adhere to ANSI/MSS SP-114 standards for heat treating, material thickness, and marking. It’s the highest quality standard for Pressure Class 1000 medium-pressure stainless steel fittings. These stainless steel fittings are more corrosion resistant than steel fittings, and almost as strong.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

External-Square-Drive Plugs

Male

NPTF Thread—NPTF (Dryseal) threads are compatible with NPT threads.

					316 Stainless Steel
	Pipe Size	Construction	Pressure Class	Body Shape	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
NPTF Male



		1/2	Solid	1000	Square	1,000 psi @ 72° F	650 psi @ 350° F	5288N29	000000


		3/4	Solid	1000	Square	1,000 psi @ 72° F	650 psi @ 350° F	5288N31	00000
		1	Solid	1000	Square	1,000 psi @ 72° F	650 psi @ 350° F	5288N32	00000
		1 1/4	Solid	1000	Square	1,000 psi @ 72° F	650 psi @ 350° F	5288N33	00000
		1 1/2	Solid	1000	Square	1,000 psi @ 72° F	650 psi @ 350° F	5288N34	00000
		2	Solid	1000	Square	1,000 psi @ 72° F	650 psi @ 350° F	5288N35	00000