Stainless Steel BSPT-to-NPT Pipe Adapters

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184 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.

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. They are 316 stainless steel for excellent corrosion resistance.

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

Straight Adapters, Female × Male

For Use With:
NPT × BSPP: Natural Gas, Water
All others: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
Specifications Met:
NPT × NPT: ASME B1.20.1, ASME B31.1, ASME B31.3
NPT × BSPP: ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A276, ASTM A479, ISO 228.1, ISO 228.2, ISO BS 2779
BSPP × NPT: ASME B1.20.1, ASME B31.1, ASME B31.3, ISO 228.1, ISO 228.2, ISO BS 2779
NPT × BSPT: ASME B1.20.1, ASME B31.1, ASME B31.3, ISO 7.1, ISO BS2.1
BSPT × NPT: ASME B1.20.1, ASME B31.1, ASME B31.3, ISO 7.1, ISO BS2.1

NPT Female × BSPT Male
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
1/8	02	6,100 psi @ 72° F	6,100 psi @ 300° F	0000000	000000
1/4	04	6,200 psi @ 72° F	6,200 psi @ 300° F	0000000	00000
3/8	06	5,000 psi @ 72° F	5,000 psi @ 300° F	0000000	00000
1/2	08	4,600 psi @ 72° F	4,600 psi @ 300° F	0000000	00000
3/4	12	4,300 psi @ 72° F	4,300 psi @ 300° F	0000000	00000
1	16	4,100 psi @ 72° F	4,100 psi @ 300° F	0000000	000000
BSPT Female × NPT Male
1/8	02	6,100 psi @ 72° F	6,100 psi @ 300° F	0000000	00000
1/4	04	6,200 psi @ 72° F	6,200 psi @ 300° F	0000000	00000
3/8	06	5,000 psi @ 72° F	5,000 psi @ 300° F	0000000	00000
1/2	08	4,600 psi @ 72° F	4,600 psi @ 300° F	0000000	00000
3/4	12	4,300 psi @ 72° F	4,300 psi @ 300° F	0000000	00000
1	16	4,100 psi @ 72° F	4,100 psi @ 300° F	0000000	000000

Straight Adapters, Male

Straight Adapter, Male Threaded Pipe

For Use With:
NPT × BSPP: Natural Gas, Water
NPT × BSPT and UN/UNF (SAE Straight) Male × NPT Male: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
Specifications Met:
NPT × BSPP: ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A276, ASTM A479, ISO 228.1, ISO 228.2, ISO BS 2779
NPT × BSPT: ASME B1.20.1, ASME B31.1, ASME B31.3, ISO 7.1, ISO BS2.1
UN/UNF (SAE Straight) Male × NPT Male: ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A182, ASTM A276, ASTM A479, SAE J1926

NPT Male × BSPT Male
Pipe Size (A)	Dash Size (A)	Pipe Size (B)	Dash Size (B)	Max. Pressure	Max. Steam Pressure		Each
1/8	02	1/8	02	9,100 psi @ 72° F	9,100 psi @ 300° F	0000000	000000
1/4	04	1/4	04	7,500 psi @ 72° F	7,500 psi @ 300° F	0000000	00000
3/8	06	3/8	06	7,200 psi @ 72° F	7,200 psi @ 300° F	0000000	00000
1/2	08	1/2	08	6,600 psi @ 72° F	6,600 psi @ 300° F	0000000	00000
3/4	12	3/4	12	6,400 psi @ 72° F	6,400 psi @ 300° F	0000000	00000
1	16	1	16	4,600 psi @ 72° F	4,600 psi @ 300° F	0000000	00000

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. 316 stainless steel fittings have excellent corrosion resistance.

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

Straight Adapters, Male

Front

For Use With: See table
Specifications Met: See table

							316 Stainless Steel
Pipe Size (A)	Dash Size (A)	Pipe Size (B)	Dash Size (B)	Max. Pressure	For Use With	Specifications Met		Each
NPT Male × BSPT Male
1/4	04	1/4	04	6,000 psi @ 72° F	Hydraulic Fluid, Oil, Water	ASME B1.20.3, DIN EN 10226, ISO 7.1	00000000	000000
3/8	06	3/8	06	5,500 psi @ 72° F	Hydraulic Fluid, Oil, Water	ASME B1.20.3, DIN EN 10226, ISO 7.1	00000000	00000
1/2	08	1/2	08	4,500 psi @ 72° F	Hydraulic Fluid, Oil, Water	ASME B1.20.3, DIN EN 10226, ISO 7.1	00000000	00000
3/4	12	3/4	12	3,500 psi @ 72° F	Hydraulic Fluid, Oil, Water	ASME B1.20.3, DIN EN 10226, ISO 7.1	00000000	00000
1	16	1	16	3,000 psi @ 72° F	Hydraulic Fluid, Oil, Water	ASME B1.20.3, DIN EN 10226, ISO 7.1	00000000	00000

Low-Pressure Stainless Steel Threaded Pipe Fittings

Use these fittings in a low-pressure pipe line. 304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

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

Straight Adapters, Male

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class: 150
Specifications Met:
BSPP × NPT and 316 Stainless Steel BSPT × NPT: ASTM A351
304 Stainless Steel BSPT × NPT: ASME B1.20.1, DIN EN 10226
Fabrication: Heat Treated
Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Flanges: Use Class 150 stainless steel

			304 Stainless Steel		316 Stainless Steel
Pipe Size	Max. Steam Pressure	Max. Pressure		Each		Each
BSPT Male × NPT Male
1/8	150 psi @ 350° F	300 psi @ 72° F	00000000	00000	00000000	00000
1/4	150 psi @ 350° F	300 psi @ 72° F	00000000	0000	00000000	0000
3/8	150 psi @ 350° F	300 psi @ 72° F	00000000	00000	00000000	0000
1/2	150 psi @ 350° F	300 psi @ 72° F	00000000	00000	00000000	00000
3/4	150 psi @ 350° F	300 psi @ 72° F	00000000	00000	00000000	00000
1	150 psi @ 350° F	300 psi @ 72° F	00000000	00000	00000000	00000
1 1/4	150 psi @ 350° F	300 psi @ 72° F	00000000	00000	00000000	00000
1 1/2	150 psi @ 350° F	300 psi @ 72° F	00000000	00000	00000000	00000
2	150 psi @ 350° F	300 psi @ 72° F	00000000	00000	00000000	00000

Straight Reducing Adapters

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class: 150
Specifications Met:
BSPP × NPT and 316 Stainless Steel BSPT × NPT: ASTM A351
304 Stainless Steel BSPT × NPT: ASME B1.20.1, DIN EN 10226
Fabrication: Heat Treated
Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Flanges: Use Class 150 stainless steel

Pipe Size				316 Stainless Steel
(A)	(B)	Max. Pressure	Max. Steam Pressure		Each
BSPT Male × NPT Male
1/4	1/8	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
3/8	1/8	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
3/8	1/4	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1/2	1/8	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1/2	1/4	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1/2	3/8	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
3/4	1/4	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
3/4	3/8	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1	3/8	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1	1/2	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1	3/4	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1 1/4	3/4	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1 1/4	1	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1 1/2	3/4	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1 1/2	1	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
1 1/2	1 1/4	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
2	1	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
2	1 1/4	300 psi @ 72° F	150 psi @ 350° F	00000000	00000
2	1 1/2	300 psi @ 72° F	150 psi @ 350° F	00000000	00000

Standard-Wall Stainless Steel Threaded Pipe Nipples and Pipe

Designed for low-pressure flow applications, this pipe is also known as Schedule 40.

304 stainless steel pipe offers very good corrosion resistance. 316 stainless steel pipe has excellent corrosion resistance.

Welded pipe has a weld bead on the inside.

Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.

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

BSPT × NPT Fully Threaded—304/304L Stainless Steel

For Use With: Natural Gas, Oil, Steam, Water, Air
Specifications Met: ASTM A312
Fittings: Use Class 150 stainless steel
Flanges: Use Class 150 stainless steel

Pipe Size	Lg.	Construction		Each
1/8	3/4"	Welded	00000000	00000
1/4	7/8"	Welded	00000000	0000
3/8	1"	Welded	00000000	0000
1/2	1 1/8"	Welded	00000000	0000
3/4	1 3/8"	Welded	00000000	0000
1	1 1/2"	Welded	00000000	0000
1 1/2	1 3/4"	Welded	00000000	00000
2	2"	Welded	00000000	00000

BSPT × NPT Threaded on Both Ends—304/304L Stainless Steel

For Use With: Natural Gas, Oil, Steam, Water, Air
Specifications Met: ASTM A312
1 1/4 Pipe Size: ASTM A733, ASME B1.20.1, ISO 7.1
Fittings: Use Class 150 stainless steel
Flanges: Use Class 150 stainless steel

1/8 Pipe Size
Lg.	Construction		Each
1 1/2"	Welded	00000000	00000
2"	Welded	00000000	0000
3"	Welded	00000000	0000
4"	Welded	00000000	0000
6"	Welded	00000000	0000
12"	Welded	00000000	00000
1/4 Pipe Size
1 1/2"	Welded	00000000	0000
2"	Welded	00000000	0000
3"	Welded	00000000	0000
4"	Welded	00000000	0000
6"	Welded	00000000	0000
12"	Welded	00000000	00000
36"	Welded	00000000	00000
3/8 Pipe Size
1 1/2"	Welded	00000000	0000
2"	Welded	00000000	0000
3"	Welded	00000000	0000
4"	Welded	00000000	0000
6"	Welded	00000000	0000
12"	Welded	00000000	00000
36"	Welded	00000000	00000
1/2 Pipe Size
1 1/2"	Welded	00000000	0000
2"	Welded	00000000	0000
3"	Welded	00000000	0000
4"	Welded	00000000	0000
6"	Welded	00000000	00000
12"	Welded	00000000	00000
36"	Welded	00000000	00000

3/4 Pipe Size
Lg.	Construction		Each
1 1/2"	Welded	00000000	00000
2"	Welded	00000000	0000
3"	Welded	00000000	0000
4"	Welded	00000000	0000
6"	Welded	00000000	00000
12"	Welded	00000000	00000
36"	Welded	00000000	00000
1 Pipe Size
2"	Welded	00000000	0000
3"	Welded	00000000	0000
4"	Welded	00000000	00000
6"	Welded	00000000	00000
12"	Welded	00000000	00000
36"	Welded	00000000	00000
1 1/2 Pipe Size
2"	Welded	00000000	00000
3"	Welded	00000000	00000
4"	Welded	00000000	00000
6"	Welded	00000000	00000
12"	Welded	00000000	00000
2 Pipe Size
3"	Welded	00000000	00000
4"	Welded	00000000	00000
6"	Welded	00000000	00000
12"	Welded	00000000	00000

BSPT × NPT Threaded on Both Ends—316/316L Stainless Steel

For Use With: Natural Gas, Oil, Steam, Water, Air
Specifications Met: ASTM A733, ASME B1.20.1, ISO 7.1
Fittings: Use Class 150 stainless steel
Flanges: Use Class 150 stainless steel

1/8 Pipe Size
Lg.	Construction		Each
3/4"	Welded	00000000	00000
1 1/2"	Welded	00000000	0000
2"	Welded	00000000	0000
3"	Welded	000000	0000
4"	Welded	00000000	0000
6"	Welded	00000000	00000
12"	Welded	00000000	00000
36"	Welded	00000000	00000
1/4 Pipe Size
7/8"	Welded	00000000	0000
1 1/2"	Welded	00000000	0000
2"	Welded	00000000	0000
3"	Welded	00000000	0000
4"	Welded	0000000	0000
6"	Welded	00000000	00000
12"	Welded	00000000	00000
36"	Welded	00000000	00000
3/8 Pipe Size
1"	Welded	0000000	0000
1 1/2"	Welded	00000000	0000
2"	Welded	00000000	0000
3"	Welded	00000000	0000
4"	Welded	00000000	00000
6"	Welded	0000000	00000
12"	Welded	00000000	00000
36"	Welded	00000000	00000
1/2 Pipe Size
1 1/8"	Welded	00000000	0000
1 1/2"	Welded	0000000	0000
2"	Welded	00000000	0000
3"	Welded	00000000	00000
4"	Welded	00000000	00000
6"	Welded	00000000	00000
12"	Welded	0000000	00000
36"	Welded	00000000	000000
3/4 Pipe Size
1 3/8"	Welded	00000000	0000
1 1/2"	Welded	00000000	0000
2"	Welded	00000000	0000
3"	Welded	00000000	00000
4"	Welded	00000000	00000
6"	Welded	00000000	00000
12"	Welded	00000000	00000
36"	Welded	0000000	000000

1 Pipe Size
Lg.	Construction		Each
1 1/2"	Welded	00000000	00000
2"	Welded	00000000	00000
3"	Welded	00000000	00000
4"	Welded	00000000	00000
6"	Welded	00000000	00000
12"	Welded	00000000	00000
36"	Welded	00000000	000000
1 1/4 Pipe Size
1 5/8"	Welded	00000000	00000
2"	Welded	00000000	00000
3"	Welded	00000000	00000
4"	Welded	00000000	00000
6"	Welded	00000000	00000
12"	Welded	00000000	00000
36"	Welded	00000000	000000
1 1/2 Pipe Size
1 3/4"	Welded	00000000	00000
2"	Welded	00000000	00000
3"	Welded	00000000	00000
4"	Welded	00000000	00000
6"	Welded	00000000	00000
12"	Welded	00000000	00000
36"	Welded	00000000	000000
2 Pipe Size
2"	Welded	00000000	00000
3"	Welded	00000000	00000
4"	Welded	00000000	00000
6"	Welded	00000000	00000
12"	Welded	00000000	000000
36"	Welded	00000000	000000