UNC Nuts | McMaster-Carr

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System of Measurement

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Material

Nut Type

Finish

Cadmium Yellow-Chromate Plated

Chrome Plated

Corrosion-Resistant Coated

Galvanized

Hot-Dipped Galvanized

Hex Nut Profile

Fastener Strength Grade/Class

Width

Height

Thread Direction

Thread Spacing

Performance

Electrically Insulating

Locking Type

Specifications Met

Thread Fit

ASME Interference Class 5

Metric Class 6g

Metric Class 6H

Metric Interference Sk6

Unified Standard Class 1A

Unified Standard Class 1B

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Unified Standard Class 3B

Fastener Strength Rating

Length

Screw Size

Color

DFARS Specialty Metals

RoHS

Compliant with Exemptions

Washer Material

REACH

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

Yes

Export Control Classification Number (ECCN)

7,923 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

1,288 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

691 products

Flange Nuts

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

301 products

Coupling Nuts

Connect and extend threaded rods

296 products

Cap Nuts

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

251 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

281 products

Square Nuts

Flat sides won’t spin in channels and square holes

103 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

45 products

Socket Nuts

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

27 products

Push-Button Nuts

Disengage the threads to quickly slide along threaded rods

15 products

Split Nuts

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

13 products

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

11 products

Press-Fit Nuts

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

199 products

Weld Nuts

Weld to metal surfaces to add permanent threads

254 products

Rivet Nuts

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

251 products

Threaded Inserts

Create new threads or repair stripped threads

1,619 products

Screw-Mount Nuts

Mount with screws, rivets, and nails to add threads to a surface

26 products

Clip-On Nuts

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

30 products

Adhesive-Mount Nuts

Attach threads to material that’s too thin for a threaded insert

78 products

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

42 products

Dowel Nuts

Form joints in blind holes in wood

11 products

Tube-Connecting Nuts

Push inside tubes to join them with a threaded stud instead of welding

21 products

Binding Barrels

Create custom low-profile fasteners with binding barrel posts, caps, and screws

773 products

Thumb Screws

Tighten and loosen by hand without the need for tools

60 products

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

188 products

Studs

Press, weld, or screw in place to add a threaded fastening point

178 products

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

2 products

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

3 products

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

36 products

Thread Adapters

Join threads of a different type, size, and gender

44 products

Standoffs

Separate, position, or connect components in assemblies

3 products

Threaded Rods

Anchor, connect, or hang components in a wide variety of applications

33 products

Material Handling

Turnbuckle Nuts

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

34 products

Fabricating and Machining

Setup Studs

Secure setup clamps and fixtures to your machine table or assemble heavy machines

627 products

Building and Machinery Hardware

Leveling Mount Inserts

Slip onto equipment and furniture to add threaded-stud leveling feet

94 products

Power Transmission

Linear Drive Nuts

Create a linear positioning system on a rotary shaft without a lead screw

3 products