UNF Couplings | McMaster-Carr

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With Sight Hole

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Stainless Steel

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Unified Standard Class 2A

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374 Products

Coupling Nuts

Coupling Nuts

The most commonly used coupling nuts

Coupling Nuts with Sight Hole

Coupling Nuts with Sight Hole

Confirm that threads are fastened to the right depth

Round Coupling Nuts

Round Coupling Nuts

Fit in tight spots and create a finished appearance

Other Products

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Grease Fitting Adapters

Grease Fitting Adapters

Mate grease fittings when the sizes and thread types don't match

Tube Fittings

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

Faucet Spout Thread Adapters

Faucet Spout Thread Adapters

Connect the female end of your garden hose to a faucet spout

Hose Fittings

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

Pipe Fittings

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

Orifice Valves

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

Rotary Unions

Transfer air, water, oil, and steam from supply lines to continuously revolving drums and rollers

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