Stainless Steel BSPP-to-NPT Pipe Adapters

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Fitting Type

Adapter

Reducer

Reducing Adapter

System of Measurement

Pipe Size

Material

Thread Type

Gender

For Use With

Maximum Pressure @ Temperature

Pipe Material

304/304L Stainless Steel

316 Stainless Steel

316/316L Stainless Steel

Dash Size

Specifications Met

Length

Flange Material

304/304L Stainless Steel

316 Stainless Steel

316/316L Stainless Steel

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

Yes

RoHS

Compliant

REACH

Compliant

Export Control Classification Number (ECCN)

2B999

DFARS Specialty Metals

Pressure Rating

Performance

Fabrication

Maximum Steam Pressure @ Temperature

Gasket Material

122 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

Reducing Adapter

Join pipe of different sizes and fitting connections

62 products

Reducer

Transition between pipe of different sizes

62 products

Performance

Precision

The tightest tolerances of our threaded fittings

18 products

Extreme-Pressure Stainless Steel Threaded Pipe Fittings

With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines.

Straight Adapters

Female x Male

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.

	Pipe Size		Dash Size			316 Stainless Steel
	(A)	(B)	(A)	(B)	Body Shape	Max. Pressure @ Temp.		Each
BSPP Female × NPT Male



		1/8	1/8	02	02	Hex	6,000 psi @ 72° F	4822T76	000000


		1/4	1/4	04	04	Hex	6,000 psi @ 72° F	4822T77	00000
		3/8	3/8	06	06	Hex	6,000 psi @ 72° F	4822T78	00000
		1/2	1/2	08	08	Hex	5,000 psi @ 72° F	4822T79	00000
		3/4	3/4	12	12	Hex	4,500 psi @ 72° F	4822T81	00000
		1	1	16	16	Hex	3,500 psi @ 72° F	4822T82	00000

Straight Adapters with Gasket

Male x Male

	Pipe Size		Dash Size				316 Stainless Steel
	(A)	(B)	(A)	(B)	Body Shape	Gasket Material	Max. Pressure @ Temp.		Each
NPT Male × BSPP Male



		1/8	1/8	02	02	Hex	Buna-N	6,000 psi @ 72° F	4822T21	000000


		1/4	1/4	04	04	Hex	Buna-N	6,000 psi @ 72° F	4822T22	00000
		3/8	3/8	06	06	Hex	Buna-N	6,000 psi @ 72° F	4822T23	00000
		1/2	1/2	08	08	Hex	Buna-N	5,000 psi @ 72° F	4822T24	00000
		3/4	3/4	12	12	Hex	Buna-N	4,500 psi @ 72° F	4822T65	00000
		1	1	16	16	Hex	Buna-N	3,500 psi @ 72° F	4822T66	00000

Replacement Washers

	ID, mm	OD, mm	Thk., mm		Each
For BSPP Male



	1/8	8.56	15.88	2	4822T401	00000


	1/4	11.45	20.57	2.03	4822T402	0000
	3/8	14.96	23.8	2	4822T403	0000
	1/2	18.64	28.58	2.5	4822T404	0000
	3/4	24.13	34.93	2.5	4822T406	0000
	1	30.3	42.8	3.2	4822T407	00000

Locknuts

					303 Stainless Steel
	Pipe Size	Dash Size	Gasket Material	Max. Pressure @ Temp.		Each
NPT Female



		1/8	02	PTFE	10,000 psi @ 72° F	5530K37	000000


		1/4	04	PTFE	10,000 psi @ 72° F	5530K38	00000
		3/8	06	PTFE	10,000 psi @ 72° F	5530K39	00000
		1/2	08	PTFE	10,000 psi @ 72° F	5530K44	00000
		3/4	12	PTFE	5,000 psi @ 72° F	5530K45	000000
		1	16	PTFE	5,000 psi @ 72° F	5530K46	000000

Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings

Made to tighter tolerances than other stainless steel pipe fittings, these are also known as instrumentation fittings. The male threads are rolled for extra strength in extreme-pressure applications. Fittings are commonly used to connect equipment in gas and hydraulic fluid lines.

Straight Adapters

Female x Male

	Pipe Size		Dash Size			316 Stainless Steel
	(A)	(B)	(A)	(B)	Body Shape	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each
BSPP Female × NPT Male



		1/8	1/8	02	02	Hex	6,100 psi @ 72° F	6,100 psi @ 300° F	4092K56	000000


		1/4	1/4	04	04	Hex	6,200 psi @ 72° F	6,200 psi @ 300° F	4092K51	00000
		3/8	3/8	06	06	Hex	5,000 psi @ 72° F	5,000 psi @ 300° F	4092K52	00000
		1/2	1/2	08	08	Hex	4,600 psi @ 72° F	4,600 psi @ 300° F	4092K53	00000
		3/4	3/4	12	12	Hex	4,300 psi @ 72° F	4,300 psi @ 300° F	4092K54	00000
		1	1	16	16	Hex	4,100 psi @ 72° F	4,100 psi @ 300° F	4092K55	000000

Straight Adapters with Gasket

Fluoroelastomer—These gaskets resist a wide range of chemicals, including benzene, butyl alcohol, and ethylene glycol.

	Pipe Size				316 Stainless Steel
	(A)	(B)	Body Shape	Gasket Material	Max. Pressure @ Temp.		Each
NPT Female × BSPP Male
Female x Male


		1/8	1/8	Hex	Fluoroelastomer	5,300 psi @ 72° F	4092K711	000000


		1/4	1/4	Hex	Fluoroelastomer	5,500 psi @ 72° F	4092K712	00000
		3/8	3/8	Hex	Fluoroelastomer	4,400 psi @ 72° F	4092K713	00000
		1/2	1/2	Hex	Fluoroelastomer	4,000 psi @ 72° F	4092K714	00000
		3/4	3/4	Hex	Fluoroelastomer	3,700 psi @ 72° F	4092K715	000000
		1	1	Hex	Fluoroelastomer	2,800 psi @ 72° F	4092K716	000000


		NPT Male × BSPP Male
		Male x Male


				1/8	1/8	Hex	Fluoroelastomer	5,300 psi @ 72° F	4092K911	00000


				1/4	1/4	Hex	Fluoroelastomer	5,500 psi @ 72° F	4092K912	00000
				3/8	3/8	Hex	Fluoroelastomer	4,400 psi @ 72° F	4092K913	00000
				1/2	1/2	Hex	Fluoroelastomer	4,000 psi @ 72° F	4092K914	00000
				3/4	3/4	Hex	Fluoroelastomer	3,700 psi @ 72° F	4092K915	00000
				1	1	Hex	Fluoroelastomer	2,800 psi @ 72° F	4092K916	000000

Low-Pressure Stainless Steel Threaded Pipe Fittings

Use these fittings in a low-pressure pipe line.

Straight Adapters

Male × Male

304 Stainless Steel—Fittings hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.

	Pipe Size						304 Stainless Steel		316 Stainless Steel
	(A)	(B)	Pressure Class	Body Shape	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each		Each
BSPP Male × NPT Male



		1/8	1/8	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N157	00000	9027N167	00000


		1/4	1/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N158	0000	9027N168	00000
		3/8	3/8	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N159	00000	9027N169	00000
		1/2	1/2	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N161	00000	9027N171	00000
		3/4	3/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N162	00000	9027N172	00000
		1	1	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N163	00000	9027N173	00000
		1 1/4	1 1/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N164	00000	9027N174	00000
		1 1/2	1 1/2	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N165	00000	9027N175	00000
		2	2	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N166	00000	9027N176	00000

Straight Reducing Adapters

Male × Male

304 Stainless Steel—Fittings hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals.

	Pipe Size						304 Stainless Steel		316 Stainless Steel
	(A)	(B)	Pressure Class	Body Shape	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.		Each		Each
BSPP Male × NPT Male



		1/4	1/8	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N177	000000	9027N198	000000


		3/8	1/8	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N178	00000	9027N199	00000
		3/8	1/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N179	00000	9027N211	00000
		1/2	1/8	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N181	00000	9027N212	00000
		1/2	1/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N182	00000	9027N213	00000
		1/2	3/8	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N183	00000	9027N214	00000
		3/4	1/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N184	00000	9027N215	00000
		3/4	3/8	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N185	00000	9027N216	00000
		1	3/8	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N186	00000	9027N217	00000
		1	1/2	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N187	00000	9027N218	00000
		1	3/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N188	00000	9027N219	00000


		1 1/4	3/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N189	00000	9027N221	00000
		1 1/4	1	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N191	00000	9027N222	00000
		1 1/2	3/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N192	00000	9027N223	00000
		1 1/2	1	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N193	00000	9027N224	00000
		1 1/2	1 1/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N194	00000	9027N225	00000
		2	1	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N195	00000	9027N226	00000
		2	1 1/4	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N196	00000	9027N227	00000
		2	1 1/2	150	Hex	300 psi @ 72° F	150 psi @ 350° F	9027N197	00000	9027N228	00000

Locknuts

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

DIN 431—Locknuts that meet DIN 431 comply with international standards for pipe fitting locknut dimensions.

					304 Stainless Steel		316 Stainless Steel
	Pipe Size	Max. Pressure @ Temp.	Max. Steam Pressure @ Temp.	Specs. Met		Each		Each
NPSL Female



		1/8	300 psi @ 72° F	150 psi @ 350° F	—	4464K581	00000	4452K671	00000


		1/4	300 psi @ 72° F	150 psi @ 350° F	—	4464K582	0000	4452K672	0000
		3/8	300 psi @ 72° F	150 psi @ 350° F	—	4464K583	00000	4452K673	00000
		1/2	300 psi @ 72° F	150 psi @ 350° F	—	4464K584	00000	4452K674	00000
		3/4	300 psi @ 72° F	150 psi @ 350° F	—	4464K585	00000	4452K675	00000
		1	300 psi @ 72° F	150 psi @ 350° F	—	4464K586	00000	4452K676	00000
		1 1/4	300 psi @ 72° F	150 psi @ 350° F	—	4464K587	00000	4452K677	00000
		1 1/2	300 psi @ 72° F	150 psi @ 350° F	—	4464K588	00000	4452K678	00000
		2	300 psi @ 72° F	150 psi @ 350° F	—	4464K589	00000	4452K679	00000


		BSPP Female



				1/8	Not Rated	Not Rated	DIN 431	9027N101	0000	———	0


				1/4	Not Rated	Not Rated	DIN 431	9027N102	0000	———	0
				3/8	Not Rated	Not Rated	DIN 431	9027N103	0000	———	0
				1/2	Not Rated	Not Rated	DIN 431	9027N104	0000	———	0
				3/4	Not Rated	Not Rated	DIN 431	9027N106	0000	———	0
				1	Not Rated	Not Rated	DIN 431	9027N107	00000	———	0