Grade 8 Steel Coupling Nuts | McMaster-Carr

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With Sight Hole

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1,090 Products

Coupling Nuts

Coupling Nuts

The most commonly used coupling nuts

Round Coupling Nuts

Round Coupling Nuts

Fit in tight spots and create a finished appearance

Coupling Nuts with Sight Hole

Coupling Nuts with Sight Hole

Confirm that threads are fastened to the right depth

Other Products

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Standoffs

Separate, position, or connect components in assemblies

Connecting Rods

Connecting Rods

Use with rod ends and swivel joints to link components in push/pull assemblies

Rod End Nuts

Attach to rods, pipe, and tubing to make pivot and hinge points

Pipe Locknuts

Thread onto the male end of a pipe fitting so it won't loosen from vibration

Conduit Locknuts

Conduit Locknuts

Secure threaded conduit fittings to knockouts in outlet boxes or enclosures

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