7/16"-20 Nuts | McMaster-Carr

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Hex Nut Profile

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Cadmium Yellow-Chromate Plated

Zinc Yellow-Chromate Plated

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Left Hand

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Unified Standard Class 2B

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2B999

EAR99

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Fully Threaded

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218 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

46 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

35 products

Flange Nuts

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

15 products

Coupling Nuts

Connect and extend threaded rods

9 products

Lug Nuts

Secure pneumatic wheels to axles

1 product

Cap Nuts

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

7 products

Square Nuts

Flat sides won’t spin in channels and square holes

1 product

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

1 product

Socket Nuts

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

1 product

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

4 products

Weld Nuts

Weld to metal surfaces to add permanent threads

22 products

Threaded Inserts

Create new threads or repair stripped threads

37 products

Thread Adapters

Join threads of a different type, size, and gender

14 products

Sockets

Turn fasteners with an external drive style without slipping and damaging the drive

1 product

Fluid Handling

Tube Fitting Nuts

Tighten to create a strong seal between tube and tube fittings

9 products

Building and Machinery Hardware

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

2 products