42mm Tube Adapters | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	For Tube OD For Tube OD	Show

42mm

	For Tube OD For Tube OD	Hide

	Shape Shape


90° Elbow	Cross

Straight	Tee

	Connection Style Connection Style

Threaded

Compression

	Type Type


Adapter	Connector

Reducer

	For Tube Material For Tube Material

Stainless Steel

Steel

	Material Material

Stainless Steel

Steel

	Thread Type Thread Type

	Pipe Size Pipe Size

1 1/4

1 1/2

	Connection Type Connection Type


Pipe	Tube

	For Use With For Use With

	Gender Gender

Male

Female

	Nut Material Nut Material

Stainless Steel

Steel

	Specifications Met Specifications Met

DIN

ISO

	Maximum Temperature Maximum Temperature

100° to 249° F

250° to 499° F

500° to 999° F

	Minimum Temperature Minimum Temperature

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

DFARS Specialty Metals
COTS-Exempt

	Maximum Pressure Maximum Pressure

1,400 psi @ 72° F

2,300 psi @ 72° F

3,600 psi @ 72° F

	Compression Connection Type Compression Connection Type

	Standard

	For Tube Fabrication For Tube Fabrication

Seamless

	Maximum Vacuum Maximum Vacuum

Not Rated

	Sleeve Material Sleeve Material

Stainless Steel

Rubber

	Length Length

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65 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.

For Use With:
303 Stainless Steel, 316 Stainless Steel with 17-4 PH Stainless Steel Sleeve, and 360 Brass: Air, Water, Hydraulic Fluid
316 Stainless Steel: Air, Cutting Oil, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Mineral Oil, Natural Gas, Steam, Water
Temperature Range: See table
Tubing:
303 Stainless Steel and 360 Brass: Use with welded or seamless 304 or 316 stainless steel
316 Stainless Steel: Use with seamless 304 or 316/316L/316Ti stainless steel that meets DIN EN 10216-5 or DIN EN 10305-1
316 Stainless Steel with 17-4 PH Stainless Steel Sleeve: Use with welded or seamless 304 or 316 stainless steel that meets ASTM A269
Specifications Met:
316 Stainless Steel: ISO 8434, DIN 2353
316 Stainless Steel with 17-4 PH Stainless Steel Sleeve: SAE J514

A single sleeve (ferrule) bites into tubing as you tighten the nut, creating a strong seal. The nut and sleeve are included. Fittings are also known as flareless fittings or bite fittings.

316 stainless steel fittings have excellent corrosion resistance.

ISO and DIN fittings meet international dimensional standards.

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

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

Straight Adapters, Tube × Male Threaded Pipe

Metric and
UN/UNF (SAE) Male
Threads with Gasket

For Tube
OD	Wall Thick.	Pipe Size	Thread Size	Material	Gasket Material	Sleeve Material	Max. Pressure	Temp. Range, °F		Each
NPT Threads
42mm	2-3mm	1	__	316 Stainless Steel	__	316 Stainless Steel	2,300 psi @ 72° F	-75° to 750°	00000000	0000000
42mm	2-3mm	1 1/4	__	316 Stainless Steel	__	316 Stainless Steel	2,300 psi @ 72° F	-75° to 750°	00000000	000000
42mm	2-3mm	1 1/2	__	316 Stainless Steel	__	316 Stainless Steel	2,300 psi @ 72° F	-75° to 750°	00000000	000000
BSPP Threads
42mm	2-3mm	1 1/4	__	316 Stainless Steel	Fluoroelastomer Rubber	316 Stainless Steel	3,600 psi @ 72° F	-10° to 390°	00000000	000000
42mm	2-3mm	1 1/2	__	316 Stainless Steel	Fluoroelastomer Rubber	316 Stainless Steel	3,600 psi @ 72° F	-10° to 390°	00000000	000000
BSPT Threads
42mm	2-3mm	1 1/2	__	316 Stainless Steel	__	316 Stainless Steel	2,300 psi @ 72° F	-75° to 750°	00000000	000000
UN/UNF (SAE) Threads
42mm	2-3mm	__	1 5/8"-12	316 Stainless Steel	Fluoroelastomer Rubber	316 Stainless Steel	2,300 psi @ 72° F	-10° to 390°	00000000	000000

Straight Adapters (Swivels Until Tightened), Tube × Male Threaded Pipe

Female Tube with Gasket

For Tube
OD, mm	Wall Thick., mm	Pipe Size	Material	Gasket Material	Sleeve Material	Max. Pressure	Temp. Range, °F		Each
NPT Threads
42	2-3	1 1/2	316 Stainless Steel	Fluoroelastomer Rubber	316 Stainless Steel	2,300 psi @ 72° F	-10° to 390°	00000000	0000000
BSPP Threads
42	2-3	1 1/2	316 Stainless Steel	Fluoroelastomer Rubber	316 Stainless Steel	3,600 psi @ 72° F	-10° to 390°	00000000	000000

Straight Connectors, Tube

For Tube
OD	Wall Thick.	Material	Sleeve Material	Max. Pressure	Temp. Range, °F		Each
42mm	2-3mm	316 Stainless Steel	316 Stainless Steel	3,600 psi @ 72° F	-75° to 750°	0000000	0000000

Straight Connectors (Swivels Until Tightened), Tube

Female Tube with Gasket

For Tube
OD, mm	Wall Thick., mm	Material	Gasket Material	Sleeve Material	Max. Pressure	Temp. Range, °F		Each
42	2-3	316 Stainless Steel	Fluoroelastomer Rubber	316 Stainless Steel	3,600 psi @ 72° F	-10° to 390°	0000000	0000000

Through-Wall Straight Connectors, Tube

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.

For Tube
OD	Wall Thick.	Material	Sleeve Material	Max. Pressure	Temp. Range, °F	For Hole Dia.	For Min. Wall Thick., mm		Each
42mm	2-3mm	316 Stainless Steel	316 Stainless Steel	3,600 psi @ 72° F	-75° to 750°	56mm	17	0000000	0000000

90° Elbow Adapters (Swivels Until Tightened), Tube

Female Tube with Gasket

For Tube
OD, mm	Wall Thick., mm	Material	Gasket Material	Sleeve Material	Max. Pressure	Temp. Range, °F		Each
42	2-3	316 Stainless Steel	Fluoroelastomer Rubber	316 Stainless Steel	3,600 psi @ 72° F	-10° to 390°	0000000	0000000

90º Elbow Adapters, Tube × Male Threaded Pipe

For Tube
OD	Wall Thick.	Pipe Size	Material	Sleeve Material	Max. Pressure	Temp. Range, °F		Each
NPT Threads
42mm	2-3mm	1 1/2	316 Stainless Steel	316 Stainless Steel	2,300 psi @ 72° F	-75° to 750°	0000000	0000000

90° Elbow Connectors, Tube

For Tube
OD	Wall Thick.	Material	Sleeve Material	Max. Pressure	Temp. Range, °F		Each
42mm	2-3mm	316 Stainless Steel	316 Stainless Steel	3,600 psi @ 72° F	-75° to 750°	0000000	0000000

Tee Connectors, Tube

For Tube
OD, mm	Wall Thick., mm	Material	Sleeve Material	Max. Pressure	Temp. Range, °F		Each
42	2-3	316 Stainless Steel	316 Stainless Steel	3,600 psi @ 72° F	-75° to 750°	0000000	0000000

Nuts

For Tube
OD	Wall Thick.	Nut Material	Max. Pressure	Temp. Range, °F		Each
42mm	2-3mm	316 Stainless Steel	3,600 psi @ 72° F	-75° to 750°	0000000	000000

Sleeves

For Tube
OD	Wall Thick.	Sleeve Material	Max. Pressure	Temp. Range, °F		Each
42mm	2-3mm	316 Stainless Steel	3,600 psi @ 72° F	-75° to 750°	0000000	000000

Vibration-Resistant Compression Fittings for Stainless Steel Tubing

For Use With: Acetylene, Air, Butane, Compressed Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Helium, Hydraulic Fluid (Petroleum Base), Kerosene, Mineral Oil, Natural Gas, Nitrogen, Propane, Soap Solutions
Temperature Range: -10° to 400° F
Tubing: Use with seamless 316Ti or 321 stainless steel
Specifications Met: DIN 3861

Instead of a metal sleeve (ferrule), these fittings have a rubber sleeve that cushions tubing and absorbs vibration to maintain a tight seal, even when connected to large pumps. However, rubber sleeves can’t withstand temperatures as high as metal ones. To create the strong seal, tighten the included nut. These fittings are made of 316 stainless steel, so they have excellent corrosion resistance. They’re also known as flareless fittings. All meet DIN 3861, which is an international standard for compression tube fitting specifications.

BSPP and metric male threads have a gasket to prevent leaks.

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

Straight Adapters, Tube × Male Threaded Pipe

BSPP and Metric
Male Threads with
Gasket and Washer

For Tube
OD, mm	Wall Thickness, mm	Pipe Size	Thread Size	Thread Pitch, mm	Material	Gasket Material	Maximum Pressure		Each
NPT Threads
42	3.5	1 1/2	__	__	316 Stainless Steel	__	2,300 psi @ 72° F	00000000	0000000
BSPP Threads
42	3.5	1 1/2	__	__	316 Stainless Steel	Fluoroelastomer Rubber	2,300 psi @ 72° F	00000000	000000
Metric Threads
42	3.5	__	M48	2	316 Stainless Steel	Fluoroelastomer Rubber	2,300 psi @ 72° F	00000000	000000

Straight Connectors, Tube

For Tube
OD, mm	Wall Thickness, mm	Material	Maximum Pressure		Each
42	3.5	316 Stainless Steel	2,300 psi @ 72° F	00000000	0000000

Through-Wall Straight Connectors, Tube

Through-Wall Connectors, Tube

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.

For Tube
OD, mm	Wall Thickness, mm	Material	Maximum Pressure	For Hole Diameter, mm	For Maximum Wall Thickness, mm		Each
42	3.5	316 Stainless Steel	2,300 psi @ 72° F	52	16	00000000	0000000

Straight Connectors (Swivels Until Tightened), Tube

For Tube
OD, mm	Wall Thickness, mm	Material	Gasket Material	Maximum Pressure		Each
42	3.5	316 Stainless Steel	Fluoroelastomer Rubber	2,300 psi @ 72° F	00000000	0000000

Straight Reducers (Swivels Until Tightened), Tube

For Tube OD (Wall Thickness)	Material	Gasket Material	Maximum Pressure		Each
42 mm (3.5 mm) × 18 mm (2 mm)	316 Stainless Steel	Fluoroelastomer Rubber	2,300 psi @ 72° F	00000000	0000000
42 mm (3.5 mm) × 22 mm (2.5 mm)	316 Stainless Steel	Fluoroelastomer Rubber	2,300 psi @ 72° F	00000000	000000
42 mm (3.5 mm) × 28 mm (2.5 mm)	316 Stainless Steel	Fluoroelastomer Rubber	2,300 psi @ 72° F	00000000	000000
42 mm (3.5 mm) × 35 mm (3 mm)	316 Stainless Steel	Fluoroelastomer Rubber	2,300 psi @ 72° F	00000000	000000

90° Elbow Adapters, Tube × Male Threaded Pipe

90° Elbow
Adapters, Tube ×
Male Threaded Pipe

For Tube
OD, mm	Wall Thickness, mm	Pipe Size	Material	Maximum Pressure		Each
NPT Threads
42	3.5	1 1/2	316 Stainless Steel	2,300 psi @ 72° F	00000000	0000000

90° Elbow Connectors, Tube

For Tube
OD, mm	Wall Thickness, mm	Material	Maximum Pressure		Each
42	3.5	316 Stainless Steel	2,300 psi @ 72° F	00000000	0000000

Tee Connectors, Tube

For Tube
OD, mm	Wall Thickness, mm	Material	Maximum Pressure		Each
42	3.5	316 Stainless Steel	2,300 psi @ 72° F	00000000	0000000

Cross Connectors, Tube

For Tube
OD, mm	Wall Thickness, mm	Material	Maximum Pressure		Each
42	3.5	316 Stainless Steel	2,300 psi @ 72° F	00000000	000000000

Nuts

Nut

For Tube
OD, mm	Wall Thickness, mm	Nut Material	Maximum Pressure		Each
18	2	316 Stainless Steel	4,500 psi @ 72° F	00000000	000000
22	2.5	316 Stainless Steel	2,300 psi @ 72° F	00000000	00000
28	2.5	316 Stainless Steel	2,300 psi @ 72° F	00000000	000000
35	3	316 Stainless Steel	2,300 psi @ 72° F	00000000	000000
42	3.5	316 Stainless Steel	2,300 psi @ 72° F	00000000	000000

Compression Fittings for Steel Tubing

BSPP and
UN/UNF (SAE) Male
Threads with Gasket

For Use With: Inch: Air, Hydraulic Fluid, Water
Metric: Hydraulic Fluid
Tubing: Inch: Use with welded steel
Metric: Use with seamless steel
Specifications Met: Inch: SAE J514
Metric: ISO 8434, DIN 2353

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

Straight Adapters, Tube × Male Threaded Pipe

BSPP and
UN/UNF (SAE) Male
Threads with Gasket

Temperature Range: See table

For Tube
OD	Pipe Size	Material	Gasket Material	Max. Pressure	Temp. Range, °F		Each
NPT Threads
42mm	1 1/4	Steel	__	2,300 psi @ 72° F	-75° to 750°	00000000	000000
BSPP Threads
42mm	1 1/4	Steel	Buna-N Rubber	3,600 psi @ 72° F	-20° to 212°	00000000	000000
42mm	1 1/2	Steel	Buna-N Rubber	3,600 psi @ 72° F	-20° to 212°	00000000	00000

Straight Connectors, Tube

Temperature Range: See table

For Tube
OD	Material	Max. Pressure	Temp. Range, °F		Each
42mm	Steel	3,600 psi @ 72° F	-75° to 750°	00000000	000000

Through-Wall Straight Connectors, Tube

Temperature Range: See table

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.

For Tube
OD	Material	Max. Pressure	Temp. Range, °F	For Max. Wall Thick.		Each
42mm	Steel	3,600 psi @ 72° F	-75° to 750°	17mm	00000000	0000000

Straight Connectors (Swivels Until Tightened), Tube

Temperature Range: See table

Fittings that swivel until tightened rotate 360° for easy installation.

For Tube
OD, mm	Material	Gasket Material	Max. Pressure	Temp. Range, °F		Each
42	Steel	Buna-N Rubber	3,600 psi @ 72° F	-20° to 212°	00000000	000000

90° Elbow Adapters, Tube × Male Threaded Pipe

Temperature Range: See table

For Tube
OD	Pipe Size	Material	Max. Pressure	Temp. Range, °F		Each
NPT Threads
42mm	1 1/2	Steel	1,400 psi @ 72° F	-75° to 750°	00000000	0000000

90° Elbow Adapters (Swivels Until Tightened), Tube

Temperature Range: -20° to 212° F

Fittings that swivel until tightened rotate 360° for easy installation.

For Tube OD, mm	Material	Gasket Material	Max. Pressure		Each
42	Steel	Buna-N Rubber	3,600 psi @ 72° F	00000000	0000000

Nuts

Temperature Range: See table

For Tube OD	Nut Material	Max. Pressure	Temp. Range, °F		Each
42mm	Steel	3,600 psi @ 72° F	-75° to 750°	00000000	000000

Sleeves

Temperature Range: See table

For Tube OD	Sleeve Material	Max. Pressure	Temp. Range, °F		Each
42mm	Steel	3,600 psi @ 72° F	-20° to 212°	00000000	00000

Vibration-Resistant Compression Fittings for Steel Tubing

For Use With: Cutting Oil, Diesel Fuel
Temperature Range: -30° to 250° F
Tubing: Use with seamless steel
Specifications Met: DIN 3861

The sleeve (ferrule) in these fittings is made of rubber instead of metal, so it cushions the tubing and absorbs vibration while creating a tight seal. Fittings are also known as flareless fittings. They are zinc-plated steel for fair corrosion resistance.

BSPP male threads have a gasket and washer to prevent leaks.

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

Straight Adapters, Tube × Male Threaded Pipe

BSPP Male
Threads with
Gasket and Washer

NPTF Threads
For Tube OD, mm	Pipe Size	Material	Gasket Material	Washer Material	Max. Pressure		Each
42	1 1/2	Zinc-Plated Steel	__	__	2,300 psi @ 72° F	00000000	0000000
BSPP Threads
42	1 1/2	Zinc-Plated Steel	Buna-N Rubber	Zinc-Plated Steel	3,600 psi @ 72° F	00000000	00000

Straight Adapters, Tube × Female Threaded Pipe

BSPP Threads
For Tube OD, mm	Pipe Size	Material	Max. Pressure		Each
42	1 1/2	Zinc-Plated Steel	2,300 psi @ 72° F	00000000	0000000

Straight Connectors, Tube

For Tube OD, mm	Material	Max. Pressure		Each
42	Zinc-Plated Steel	3,600 psi @ 72° F	00000000	0000000

Straight Connectors (Swivels Until Tightened), Tube

For Tube OD, mm	Material	Max. Pressure		Each
42	Zinc-Plated Steel	3,600 psi @ 72° F	00000000	000000

Through-Wall Straight Connectors, Tube

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.

For Tube OD, mm	Material	Max. Pressure	For Hole Dia., mm	For Max. Wall Thick., mm		Each
42	Zinc-Plated Steel	3,600 psi @ 72° F	56	16	00000000	0000000

Straight Reducers (Swivels Until Tightened), Tube

For Tube OD, mm	Material	Gasket Material	Max. Pressure		Each
42 × 18	Zinc-Plated Steel	Buna-N Rubber	3,600 psi @ 72° F	00000000	000000
42 × 22	Zinc-Plated Steel	Buna-N Rubber	3,600 psi @ 72° F	00000000	00000
42 × 28	Zinc-Plated Steel	Buna-N Rubber	3,600 psi @ 72° F	00000000	00000
42 × 35	Zinc-Plated Steel	Buna-N Rubber	3,600 psi @ 72° F	00000000	00000

90° Elbow Connectors, Tube

For Tube OD, mm	Material	Max. Pressure		Each
42	Zinc-Plated Steel	3,600 psi @ 72° F	00000000	0000000

Tee Connectors, Tube

For Tube OD, mm	Material	Max. Pressure		Each
42	Zinc-Plated Steel	3,600 psi @ 72° F	00000000	0000000

Cross Connectors, Tube

For Tube OD, mm	Material	Max. Pressure		Each
42	Zinc-Plated Steel	2,300 psi @ 72° F	00000000	0000000

Nuts

For Tube OD, mm	Nut Material	Max. Pressure		Each
18	Zinc-Plated Steel	5,800 psi @ 72° F	00000000	000000
22	Zinc-Plated Steel	3,600 psi @ 72° F	00000000	00000
28	Zinc-Plated Steel	3,600 psi @ 72° F	00000000	00000
35	Zinc-Plated Steel	3,600 psi @ 72° F	00000000	00000
42	Zinc-Plated Steel	3,600 psi @ 72° F	00000000	00000