BSPP Bulkheads | McMaster-Carr

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	Pipe Size Pipe Size

	Thread Type Thread Type	Show

BSPP

	Thread Type Thread Type	Hide

UN/UNF (SAE Straight)

UNF

	System of Measurement System of Measurement

Metric

	Thread Size Thread Size

	Mount Type Mount Type

	Through Wall

	Material Material

Brass

Stainless Steel

Steel

	Type Type


Connector	Adapter

	For Use With For Use With

	Shape Shape

	Straight

	Gender Gender

Female

Male

	Connection Style Connection Style

Push to Connect

Threaded

	Connection Type Connection Type


Pipe	Tube

	Maximum Pressure Maximum Pressure

	Length Length

	Thread Pitch Thread Pitch

1.5 mm

	For Maximum Wall Thickness For Maximum Wall Thickness

	For Hole Diameter For Hole Diameter

	Hex Width Hex Width

	Finish Finish

Nickel Plated

Galvanized

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	For Tube OD For Tube OD

	Specifications Met Specifications Met

39 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.

High-Pressure Brass Threaded Pipe Fittings

These fittings have the strength to handle high-pressure applications. They are brass for good corrosion resistance.

Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through a wall or panel to create an inlet or outlet.

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

Through-Wall Straight Connectors

Exploded View

For Use With:
NPT Threads: Air, Water
BSPP and Metric Threads: Air, Natural Gas, Oil, Water
Specifications Met: See table

BSPP Female
Pipe Size	For Hole Dia.	For Max. Wall Thick.	Max. Pressure	Specifications Met		Each
1/8	11/16"	11/32"	1,000 psi @ 72° F	SAE J530, SAE J531	000000000	000000
1/4	13/16"	37/64"	1,000 psi @ 72° F	SAE J530, SAE J531	000000000	00000
3/8	1 1/16"	35/64"	1,000 psi @ 72° F	SAE J530, SAE J531	000000000	00000
1/2	1 1/8"	25/32"	1,000 psi @ 72° F	SAE J530, SAE J531	000000000	00000
3/4	1 3/8"	7/8"	1,000 psi @ 72° F	SAE J530, SAE J531	000000000	00000
1	1 11/16"	61/64"	1,000 psi @ 72° F	SAE J530, SAE J531	000000000	000000

High-Pressure Plated Brass Threaded Pipe Fittings

The plating on these brass fittings creates a shiny finish and provides extra protection in corrosive environments. Fittings have the strength to handle high-pressure applications.

Nickel-plated brass fittings provide better corrosion resistance than unplated brass fittings.

Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through a wall or panel to create an inlet or outlet.

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

Through-Wall Straight Adapters

For Use With: Air, Natural Gas, Oil, Water

				Nickel-Plated Brass
Pipe Size	Thread Size	For Max. Wall Thick.	Max. Pressure		Each
BSPP Female × Metric Male
1/8	M16 × 1.5 mm	0.394"	2,170 psi @ 72° F	00000000	00000
1/4	M20 × 1.5 mm	0.63"	1,450 psi @ 72° F	00000000	0000
3/8	M26 × 1.5 mm	0.591"	1,080 psi @ 72° F	00000000	00000
1/2	M28 × 1.5 mm	0.827"	725 psi @ 72° F	00000000	00000
3/4	M33 × 1.5 mm	0.886"	1,230 psi @ 72° F	00000000	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.

Through-wall fittings are also known as bulkhead couplings; they mount through your wall to create an inlet or outlet. When installing, the gasket should be on the inside of the wall. BSPP and metric male threads have either a gasket or a gasket and washer to prevent leaks.

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

Through-Wall Straight Connectors

For Use With: Hydraulic Fluid, Oil, Water
Specifications Met: ISO 1179, ISO 8434-6

					316 Stainless Steel
Pipe Size	Dash Size	For Max. Wall Thick., mm	Lg., mm	Max. Pressure		Each
BSPP Male
1/8	02	8	43	5,000 psi @ 72° F	00000000	000000
1/4	04	8	46	5,000 psi @ 72° F	00000000	00000
3/8	06	8	55	5,000 psi @ 72° F	00000000	00000
1/2	08	8	59	4,500 psi @ 72° F	00000000	00000
3/4	12	8	64	3,600 psi @ 72° F	00000000	000000
1	16	8	75	2,900 psi @ 72° F	00000000	000000

Replacement Washers

Temperature Range: -22° to 230° F

		316 Stainless Steel
For Pipe Size	Gasket Material	Thickness		Each
For BSPP Male
1/8	Buna-N Rubber	2mm	00000000	00000
1/4	Buna-N Rubber	2.03mm	00000000	0000
3/8	Buna-N Rubber	2mm	00000000	0000
1/2	Buna-N Rubber	2.5mm	00000000	0000
3/4	Buna-N Rubber	2.5mm	00000000	0000
1	Buna-N Rubber	3.2mm	00000000	00000

Compact Extreme-Pressure Steel Threaded Pipe Fittings

These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized steel, which has fair corrosion resistance.

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

Through-Wall Straight Connectors

BSPP Male
Threads with
Gasket and Washer

For Use With: Air, Hydraulic Fluid, Oil, Water
Specifications Met: ISO 1179, ISO 8434-6

BSPP Male
Pipe Size	Dash Size	For Hole Dia., mm	For Max. Wall Thick., mm	Max. Pressure		Each
1/4	04	13	11.5	6,500 psi @ 72° F	00000000	00000
3/8	06	15.5	13.9	5,500 psi @ 72° F	00000000	00000
1/2	08	20.8	12.7	4,500 psi @ 72° F	00000000	00000
3/4	12	26.3	11.5	3,500 psi @ 72° F	00000000	00000
1	16	33.1	12.7	3,000 psi @ 72° F	00000000	00000

Replacement Washers

Temperature Range: -20° to 230° F

For BSPP Male
For Pipe Size	Gasket Material	Thickness		Each
1/4	Buna-N Rubber	2.03mm	00000000	00000
3/8	Buna-N Rubber	2mm	00000000	000
1/2	Buna-N Rubber	2.5mm	00000000	0000
3/4	Buna-N Rubber	2.5mm	00000000	0000
1	Buna-N Rubber	3.2mm	00000000	0000

Push-to-Connect Tube Fittings for Air

Temperature Range: 0° to 170° F
Tubing: Use with firm (Durometer 95A-45D) polyethylene plastic or polyurethane rubber
Specifications Met: ISO 14743, except polybutylene plastic fittings

Insert tubing into these fittings and an internal gripping ring and O-ring hold the tubing tight. They are also known as instant fittings. To disconnect, push on the release ring and pull the tubing out of the fitting. Fittings have good corrosion resistance.

Identification rings (sold separately) snap over the release ring so you can color-code your lines.

Clips (sold separately) align and organize your tubing and fittings.

BSPP and UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.

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

Through-Wall Straight Adapters, Tube × Female Threaded Pipe

Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.

			Release Ring
For Tube OD	Pipe Size	Material	Material	Color	Max. Pressure	For Hole Dia.	For Max. Wall Thick.		Each
BSPP Threads
4mm	1/8	Nickel-Plated Brass	Plastic	Black	290 psi @ 72° F	10.5mm	7mm	00000000	000000
6mm	1/8	Nickel-Plated Brass	Plastic	Black	290 psi @ 72° F	12.5mm	8mm	00000000	00000
6mm	3/8	Nickel-Plated Brass	Plastic	Black	290 psi @ 72° F	12.5mm	8mm	00000000	00000
8mm	1/4	Nickel-Plated Brass	Plastic	Black	290 psi @ 72° F	15.5mm	8mm	00000000	00000
12mm	3/8	Nickel-Plated Brass	Plastic	Black	290 psi @ 72° F	22.5mm	8.5mm	00000000	00000
16mm	3/8	Nickel-Plated Brass	Plastic	Black	290 psi @ 72° F	27.5mm	10.5mm	00000000	00000