1/2"-20 Nuts | McMaster-Carr

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System of Measurement

Thread Size

Material

Nut Type

Fastener Strength Grade/Class

Hex Nut Profile

Height

Finish

Cadmium Yellow-Chromate Plated

Zinc Yellow-Chromate Plated

Thread Direction

Width

Thread Type

Thread Spacing

Performance

Thread Fit

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3B

Locking Type

Fastener Strength Rating

Specifications Met

Length

Drive Style

Thread Pitch

REACH

Flange Diameter

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

RoHS

Compliant

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

517 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

59 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

44 products

Flange Nuts

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

24 products

Coupling Nuts

Connect and extend threaded rods

15 products

Cap Nuts

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

9 products

Lug Nuts

Secure pneumatic wheels to axles

1 product

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

4 products

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

2 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

3 products

Weld Nuts

Weld to metal surfaces to add permanent threads

23 products

Press-Fit Nuts

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

1 product

Push Nuts

Press onto threads for a light duty hold that’s faster to install than typical nuts

1 product

Threaded Inserts

Create new threads or repair stripped threads

79 products

Thread Adapters

Join threads of a different type, size, and gender

223 products

Standoffs

Separate, position, or connect components in assemblies

Power Transmission

Shock Absorber Mounting Nuts

Secure shock absorbers after threading them into mounting blocks

1 product

Precision Lead Screws and Nuts

Pair with a motor for accurate starts and stops in automated motion and positioning applications

4 products

Fluid Handling

Tube Fitting Nuts

Tighten to create a strong seal between tube and tube fittings

7 products

Building and Machinery Hardware

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

3 products

Material Handling

Turnbuckle Bodies

Pair with end fittings to create a custom turnbuckle

1 product