Boss Fittings | McMaster-Carr

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System of Measurement

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Thread Type

UN/UNF (SAE Straight)

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Gender

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Specifications Met

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DFARS Specialty Metals

Compliant

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Not Compliant

Export Control Classification Number (ECCN)

REACH

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Compliant with Exemptions

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Threading

Fully Threaded

Partially Threaded

Threaded on Both Ends

For Use With

Tube OD

Pitch

Pressure Class

Tensile Strength

40,000 psi to 49,999 psi

50,000 psi to 59,999 psi

60,000 psi to 99,999 psi

100,000 psi or greater

For Adapting

7,701 Products

Fluid Handling

Pipe Fittings

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

413 products

Pipe Plugs

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

84 products

Pipe Flanges

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

667 products

Tube Fittings

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

347 products

Hose Fittings

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

82 products

Fastening and Joining

Weld Nuts

Weld to metal surfaces to add permanent threads

200 products

Threaded Inserts

Create new threads or repair stripped threads

486 products

Press-Fit Nuts

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

49 products

Thread Adapters

Join threads of a different type, size, and gender

3,607 products

Threaded Rods

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

978 products

Building and Machinery Hardware

Weld-Together Framing and Fittings

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

40 products

Containers, Storage, and Furniture

Metal Panels

Close off openings in structures while allowing air to pass through

254 products

Heating, Ventilation, and Air Conditioning

Duct and Duct Fittings

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

41 products