Boss Fittings | McMaster-Carr

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7,653 Products

Fluid Handling

Pipe Fittings

Form threaded, barbed, flanged, and other types of connections between lengths of pipe

Pipe Plugs

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

Pipe Flanges

Create an access point in a line by bolting two same-size flanges together with a gasket

Tube Fittings

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

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

Fastening and Joining

Weld Nuts

Weld to metal surfaces to add permanent threads

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications

Building and Machinery Hardware

Weld-Together Framing and Fittings

Weld-Together Framing and Fittings

Permanently join rails and fittings to assemble heavy duty racks, shelving, and work tables

Containers, Storage, and Furniture

Metal Panels

Close off openings in structures while allowing air to pass through

Heating, Ventilation, and Air Conditioning

Duct and Duct Fittings

Duct and Duct Fittings

Circulate air through HVAC systems using round, rectangular, and fabric duct

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