3-A Tube Fittings | McMaster-Carr

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Food Industry Standard

3-A Sanitary Standard

Thread Fit

Unified Standard Class 3A

Unified Standard Class 3B

Shape

System of Measurement

Tube OD

Material

Mica-Filled PTFE

Stainless Steel

Fitting Connection

Spec Image

Spec Image

Spec Image

Fitting Type

Reducing Adapter

Tube Material

304 Stainless Steel

304/304L Stainless Steel

316 Stainless Steel

316/316L Stainless Steel

Pipe Size

Thread Type

Dash Size

OD

Length

Elbow Type

Connects To

For Use With

Pharmaceuticals

Hydraulic Fluid

Wall Thickness

For Tube Fabrication

Thread Size

Gender

Flange OD

REACH

RoHS

Export Control Classification Number (ECCN)

DFARS Specialty Metals

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1,262 Products

Fluid Handling

Tube Fittings

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

Tube End Plugs

Insert into the ends of tube to keep out dirt and debris

Tube End Caps

Cover the ends of tube to keep out dirt and debris

Tube Fitting Nuts

Tube Fitting Nuts

Tighten to create a strong seal between tube and tube fittings

Tube Fitting Clamps

Tube Fitting Clamps

Quickly secure connections between tube fittings, including sanitary and high-vacuum fittings

Tube Sampling Ports

Tube Sampling Ports

Take samples from sanitary tubing without pausing or contaminating your line

Check Valves

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

Diverting Valves

Diverting Valves

Redirect flow between ports

On-Off Valves

Start and stop flow through a line

Filter Housings

Filter Housings

Use with filter cartridges to remove particles from liquid

Sealing

Tube Fitting Gaskets

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)