Internal Hex Nuts | McMaster-Carr

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9,954 Products

Fastening and Joining

Socket Nuts

Install in recessed holes and tight spots where a wrench won’t fit; also known as Allen nuts

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Locknuts

Hold fasteners in place to prevent loosening from vibration

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Hex Nuts

Handle most general fastening needs

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Flange Nuts

The flange distributes pressure, so you don't need a washer

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Coupling Nuts

Connect and extend threaded rods

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Panel Nuts

Extremely thin for tight spots such as electrical panels; also known as dress nuts

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Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

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Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

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Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

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Split Nuts

Swivel to attach at any point on a threaded rod for quick installation

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Press-Fit Nuts

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

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Threaded Inserts

Create new threads or repair stripped threads

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Weld Nuts

Weld to metal surfaces to add permanent threads

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Rivet Nuts

Add threads to thin panels with access from only one side; also known as blind inserts

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Clip-On Nuts

Slide onto the edge of thin panels to create a fastening point

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Thread Adapters

Join threads of a different type, size, and gender

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Power Transmission

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Mate with lead screws to move components in a straight line

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Fluid Handling

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

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Material Handling

Turnbuckle Nuts

Tighten against a turnbuckle body to prevent the end fitting from unscrewing

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