5/8"-11 Nuts | McMaster-Carr

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Nut Type

Fastener Strength Grade/Class

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Cadmium Yellow-Chromate Plated

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Corrosion-Resistant Coated

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Galvanized

Hot-Dipped Galvanized

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Hex Nut Profile

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ASME Interference Class 5

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DFARS Specialty Metals

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Threaded on Both Ends

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Export Control Classification Number (ECCN)

642 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

102 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

52 products

Flange Nuts

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

28 products

Coupling Nuts

Connect and extend threaded rods

26 products

Cap Nuts

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

19 products

Square Nuts

Flat sides won’t spin in channels and square holes

8 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

11 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

5 products

Push-Button Nuts

Disengage the threads to quickly slide along threaded rods

3 products

Socket Nuts

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

2 products

Split Nuts

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

1 product

Weld Nuts

Weld to metal surfaces to add permanent threads

8 products

Screw-Mount Nuts

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

2 products

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

101 products

Thread Adapters

Join threads of a different type, size, and gender

64 products

Binding Barrel Posts and Screws

Thread together for a low-profile fastener

4 products

Thumb Screws

Tighten and loosen by hand without the need for tools

3 products

Fabricating and Machining

T-Slot Nuts

Combine with setup studs or bolts to mount fixtures to machine tables

24 products

T-Slot Bolts

Secure clamps and workpieces to machine tables with quicker setup than a T-slot nut and stud

32 products

Setup Studs

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

49 products

Fixture Clamps

Secure your workpiece to a fixture table so it won't move during machining

7 products

Fixture Kits

Everything needed to mount workpieces of different sizes to your machine table

6 products

Building and Machinery Hardware

Machine Handles

Arms give you extra leverage to secure and position jigs, fixtures, and other equipment

1 product

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

5 products

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

12 products

Leveling Mount Inserts

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

18 products

Material Handling

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

8 products

Turnbuckles

Twist the body or end fittings to adjust the length and tension of attached rope and chain

12 products