Compression Fittings | McMaster-Carr

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System of Measurement

Tube OD

Material

Shape

Pipe Size

Fitting Connection

Tube Material

Thread Type

UN/UNF (SAE Straight)

Fitting Type

Gender

Connects To

For Use With

Nut Material

Sleeve Material

Maximum Pressure @ Temperature

Thread Size

Tube Stem OD

For Tube Wall Thickness

Dash Size

Maximum Temperature

RoHS

Compliant with Exemptions

Not Compliant

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

Yes

REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

2B999

EAR99

DFARS Specialty Metals

7,855 Products

Fluid Handling

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

6,281 products

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

234 products

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

628 products

Pipe Traps

Create a seal that prevents the backflow of gas

16 products

Tube Repair Clamps

Mend small holes, cracks, and full-circle breaks in tubing without dismantling your system

18 products

Thermocouple and RTD Fittings

Alter probe immersion depth or adapt unthreaded connections for use with threaded tanks and heads

46 products

Manual On-Off Valves

Start and stop flow through a line

126 products

Flow-Adjustment Valves

Gradually open and close to control the volume of air and liquids through a line

19 products

Check Valves

Permit flow in only one direction by closing when flow stops or reverses

18 products

Orifice Valves

Restrict the flow of liquids and gases to precisely control rate and pressure

32 products

Tap Valves

Pierce copper tubing for a secondary line to humidifiers and ice makers; also known as saddle valves

1 product

Diverting Valves

Redirect flow between ports

13 products

Electrical Power, Networking, and Controlling

Conduit Straights

Join conduit of different sizes and types, or attach conduit to a knockout in electrical boxes

131 products

Conduit Elbows

Join conduit with 45°, 90°, offset, and adjustable-angle connectors

3 products

Lubricating

Grease Fitting Junction Blocks

Send different types and amounts of grease from multiple grease fittings to lubricate several points

9 products

Grease Fitting Manifolds

Lubricate multiple points with the same amount and type of grease using one grease fitting

3 products

Coolant Hose Connectors

Join lengths of coolant hose to components, supply lines, and each other

5 products

Fastening and Joining

Brazing Rings

Snap into unthreaded pipe fittings for an extra-strong, leak-resistant connection

5 products

Facility and Grounds Maintenance

Water Supply Stop Valves

Shut off water to faucets, toilets, and fountains

18 products