McMaster-Carr

Choose a Category

Clear All

	Pipe Size Pipe Size

1/8

	Thread Type Thread Type

BSPT

NPT

	Type Type

	Adapter

	Material Material

Brass

Stainless Steel

Steel

	System of Measurement System of Measurement

Inch

Metric

	Length Length

	Connection Style Connection Style	Show

Compression

	Connection Style Connection Style	Hide

	Shape Shape

	Straight

	For Tube OD For Tube OD

	For Use With For Use With

	Connection Type Connection Type


Pipe	Tube

	Maximum Pressure Maximum Pressure

	Compression Connection Type Compression Connection Type


Tube Stem	Standard

	For Tube Material For Tube Material

Stainless Steel

Copper

	Gender Gender

Male

Female

	Dash Size Dash Size

	Maximum Vacuum Maximum Vacuum

Not Rated

	Maximum Temperature Maximum Temperature

	Number of Outlets Number of Outlets

	Compatible With Compatible With

Parker CPI

	For Tube Fabrication For Tube Fabrication

Seamless

Welded

	For Tube Specifications Met For Tube Specifications Met

	Tube Stem OD Tube Stem OD

View catalog pages (3)

Forward

How can we improve?

60 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.

About Grease Fitting Threads

For Use With: Air, Cutting Oil, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Mineral Oil, Natural Gas, Steam, Water
Temperature Range: -420° to 1200° F
Tubing: Use with welded or seamless 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
Compatible With: Parker CPI

Made to tighter tolerances than other compression fittings, these are designed for high-precision applications. Also known as instrumentation fittings and flareless fittings. They come with a nut and a single sleeve (ferrule). The sleeve bites into tubing as you tighten the nut to create a strong seal. Fittings are 316 stainless steel for excellent corrosion resistance. A molybdenum disulfide coating on the nut acts as a lubricant for easy installation.

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

Straight Adapters, Tube Stem × Male NPT Threaded Pipe

Fittings with tube stem insert into the tube end of another fitting in place of a length of tubing.

Tube Stem OD	Pipe Size	Material	Max. Pressure		Each
1/8"	1/8	316 Stainless Steel	5,500 psi @ 72° F	00000000	00000
1/8"	1/4	316 Stainless Steel	5,500 psi @ 72° F	00000000	00000
1/4"	1/8	316 Stainless Steel	4,000 psi @ 72° F	00000000	0000
1/4"	1/4	316 Stainless Steel	4,000 psi @ 72° F	00000000	0000
1/4"	3/8	316 Stainless Steel	4,000 psi @ 72° F	00000000	00000
3/8"	1/4	316 Stainless Steel	2,600 psi @ 72° F	00000000	00000
3/8"	3/8	316 Stainless Steel	2,600 psi @ 72° F	00000000	00000
3/8"	1/2	316 Stainless Steel	2,600 psi @ 72° F	00000000	00000
1/2"	3/8	316 Stainless Steel	2,100 psi @ 72° F	00000000	00000
1/2"	1/2	316 Stainless Steel	2,100 psi @ 72° F	00000000	00000
3/4"	3/4	316 Stainless Steel	2,100 psi @ 72° F	00000000	00000

Precision Compression Fittings for Copper Tubing

For Use With: Air, Cutting Oil, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Mineral Oil, Natural Gas, Steam, Water
Temperature Range: -40° to 350° F
Tubing: Use with seamless copper that meets ASTM B68, ASTM B75, or ASTM B88
Compatible With: Parker CPI

Made to tighter tolerances than other compression fittings, these are designed for high-precision applications. They are also known as instrumentation fittings and flareless fittings. They come with a nut and a single sleeve (ferrule). The sleeve bites into tubing as you tighten the nut to create a strong seal. The nut has a molybdenum disulfide coating that acts as a lubricant for easy installation. Fittings are brass for good corrosion resistance.

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

Straight Adapters, Tube Stem × Male Threaded Pipe

Fittings with tube stem insert into the tube end of another fitting in place of a length of tubing.

NPT Threads
Tube Stem OD	Pipe Size	Material	Max. Pressure		Each
1/8"	1/8	Brass	2,700 psi @ 72° F	00000000	00000
1/8"	1/4	Brass	2,700 psi @ 72° F	00000000	0000
1/4"	1/8	Brass	1,200 psi @ 72° F	00000000	0000
1/4"	1/4	Brass	1,200 psi @ 72° F	00000000	0000
1/4"	3/8	Brass	1,200 psi @ 72° F	00000000	0000
3/8"	1/4	Brass	1,000 psi @ 72° F	00000000	0000
3/8"	3/8	Brass	1,000 psi @ 72° F	00000000	0000
3/8"	1/2	Brass	1,000 psi @ 72° F	00000000	00000
1/2"	3/8	Brass	800 psi @ 72° F	00000000	00000
1/2"	1/2	Brass	800 psi @ 72° F	00000000	00000
3/4"	3/4	Brass	800 psi @ 72° F	00000000	00000

Nickel-Plated Brass Compression
Fittings for Copper Tubing

For Use With: Air, Cutting Oil, Diesel Fuel, Ethyl Alcohol, Fuel Oil, Gasoline, Hydraulic Fluid, Isopropyl Alcohol, Lubricants, Mineral Oil, Natural Gas, Steam, Water
Temperature Range: -75° to 550° F, except 90° elbow adapters with BSPP threads are 0° to 170° F
Tubing: Use with copper
Specifications Met: DIN 3861, except nuts meet DIN 3870

With a nickel-plated finish, these compression fittings resist corrosion better than plain brass fittings. They have a single sleeve (ferrule) made of plain brass that gently bites into copper tubing as you tighten the nut, creating a strong seal. The nut and sleeve are included. These fittings are also known as flareless fittings. All meet DIN standards for tube fitting dimensions.

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

Straight Adapter, Tube × Male Threaded Pipe

For Tube
OD, mm	Wall Thickness, mm	Pipe Size	Material	Maximum Pressure	Pkg. Qty.		Each
BSPT Threads
4	1	1/8	Nickel-Plated Brass	1,800 psi @ 72° F	__	0000000	00000
6	1	1/8	Nickel-Plated Brass	2,500 psi @ 72° F	__	0000000	0000
6	1	1/4	Nickel-Plated Brass	2,500 psi @ 72° F	__	0000000	0000
8	1	1/8	Nickel-Plated Brass	2,100 psi @ 72° F	__	0000000	0000
8	1	1/4	Nickel-Plated Brass	2,100 psi @ 72° F	__	0000000	0000
8	1	3/8	Nickel-Plated Brass	2,100 psi @ 72° F	__	0000000	0000
10	1	1/4	Nickel-Plated Brass	1,600 psi @ 72° F	__	0000000	0000
10	1	3/8	Nickel-Plated Brass	1,600 psi @ 72° F	__	0000000	0000
12	1	3/8	Nickel-Plated Brass	1,000 psi @ 72° F	__	0000000	0000
12	1	1/2	Nickel-Plated Brass	1,000 psi @ 72° F	__	0000000	0000
14	1	1/2	Nickel-Plated Brass	1,000 psi @ 72° F	__	0000000	0000
15	1	1/2	Nickel-Plated Brass	1,000 psi @ 72° F	__	0000000	0000
16	1	1/2	Nickel-Plated Brass	1,000 psi @ 72° F	__	00000000	0000
							Pkg.
18	1	1/2	Nickel-Plated Brass	900 psi @ 72° F	1	00000000	0000

Nuts

Nut

For Tube
OD, mm	Wall Thickness, mm	Nut Material	Maximum Pressure	Length, mm		Each
Short Nuts
4	1	Nickel-Plated Brass	1,800 psi @ 72° F	11	00000000	00000
6	1	Nickel-Plated Brass	2,500 psi @ 72° F	12	00000000	000
8	1	Nickel-Plated Brass	2,100 psi @ 72° F	12	00000000	000
10	1	Nickel-Plated Brass	1,600 psi @ 72° F	16	00000000	0000
12	1	Nickel-Plated Brass	1,000 psi @ 72° F	16	00000000	0000
14	1	Nickel-Plated Brass	1,000 psi @ 72° F	19	00000000	0000
15	1	Nickel-Plated Brass	1,000 psi @ 72° F	17	00000000	0000
16	1	Nickel-Plated Brass	1,000 psi @ 72° F	19	00000000	0000
18	1	Nickel-Plated Brass	900 psi @ 72° F	18	00000000	0000

Sleeves

Sleeve

For Tube
OD, mm	Wall Thickness, mm	Sleeve Material	Maximum Pressure		Each
4	1	Brass	1,800 psi @ 72° F	00000000	00000
6	1	Brass	2,500 psi @ 72° F	00000000	000
8	1	Brass	2,100 psi @ 72° F	00000000	000
10	1	Brass	1,600 psi @ 72° F	00000000	000
12	1	Brass	1,000 psi @ 72° F	00000000	000
14	1	Brass	1,000 psi @ 72° F	00000000	000
15	1	Brass	1,000 psi @ 72° F	00000000	000
16	1	Brass	1,000 psi @ 72° F	00000000	000
18	1	Brass	900 psi @ 72° F	00000000	000

Grease Fitting Manifolds

Inlet

3 Inlets

6 Inlets

10 Inlets

Lubricate multiple points from a single location. Dispense grease into the grease fittings. Use the compression fittings on the outlets to connect tubing (not included) between the grease fittings and lubrication points.

Zinc-plated steel manifolds have mild corrosion resistance. 303 stainless steel manifolds are more corrosion resistant than zinc-plated steel manifolds and have good chemical resistance.

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

Zinc-Plated Steel
Number of Inlets	Number of Outlets	For NLGI Viscosity Grade	For Tube OD	Overall Wd.	Overall Dp.	Overall Ht.	Max. Pressure, psi		Each
3	3	00, 0, 1, 2	1/4"	2 3/4"	3/4"	2 3/4"	1,800	000000	000000
6	6	00, 0, 1, 2	1/4"	5 3/4"	3/4"	2 3/4"	1,800	000000	000000
10	10	00, 0, 1, 2	1/4"	9 3/4"	3/4"	2 1/2"	10,000	000000	000000
303 Stainless Steel
3	3	00, 0, 1, 2	1/4"	2 3/4"	3/4"	2 1/2"	5,000	000000	000000
6	6	00, 0, 1, 2	1/4"	5 3/4"	3/4"	2 1/2"	5,000	000000	000000
10	10	00, 0, 1, 2	1/4"	9 3/4"	3/4"	2 1/2"	5,000	000000	000000

Terms and Conditions and Privacy Policy