M8 Nuts | McMaster-Carr

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Hex Nut Profile

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Corrosion-Resistant Coated

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Metric Rounded Trapezoidal

Thread Spacing

Thread Direction

Specifications Met

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Fastener Strength Rating

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Length

REACH

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Metric Interference Sk6

Unified Standard Class 2A

Unified Standard Class 2B

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Compliant

Compliant with Exemptions

Flange Diameter

DFARS Specialty Metals

Compliant

Exempt

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Export Control Classification Number (ECCN)

1,263 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

74 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

40 products

Flange Nuts

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

41 products

Coupling Nuts

Connect and extend threaded rods

17 products

Cap Nuts

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

10 products

Thumb Nuts

Easy to tighten and loosen by hand for making frequent adjustments

22 products

Square Nuts

Flat sides won’t spin in channels and square holes

7 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

10 products

Socket Nuts

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

2 products

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

1 product

Slotted Round Nuts

Fasten with a screwdriver in tight spots where there's no room for a wrench

1 product

Weld Nuts

Weld to metal surfaces to add permanent threads

25 products

Rivet Nuts

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

45 products

Press-Fit Nuts

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

11 products

Clip-On Nuts

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

9 products

Threaded Inserts

Create new threads or repair stripped threads

129 products

Adhesive-Mount Nuts

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

10 products

Snap-In Nuts

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

5 products

Binding Barrels and Screws

Thread together for a low-profile fastener

13 products

Thread Adapters

Join threads of a different type, size, and gender

471 products

Thumb Screws

Tighten and loosen by hand without the need for tools

15 products

Studs

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

25 products

Standoffs

Threaded to separate or connect parts as well as position components in assemblies

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

1 product

Building and Machinery Hardware

T-Slotted Framing Fasteners

Secure brackets and other accessories to T-slotted rails

35 products

Strut Channel Framing and Fittings

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

13 products

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

2 products

Power Transmission

Shock Absorber Mounting Nuts

Secure shock absorbers after threading them into mounting blocks

2 products

Lead Screws and Nuts

Components travel along a screw with broad, square threads to clamp and lift heavy loads

14 products

Bearing Nuts

Hold bearings, bushings, pulleys, and gears in place on threaded shafts and spindles

3 products

Ball Screws and Nuts

Internal ball bearings roll on screws for low friction when moving components at high speeds

2 products

Fabricating and Machining

T-Slot Nuts

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

9 products

T-Slot Bolts

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

2 products

Setup Studs

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

60 products

Fixture Kits

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

2 products

Fixture Clamps

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

6 products

Lathe Chuck Jaw Nuts

Secure jaws to a CNC lathe chuck

1 product

Material Handling

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

6 products

Electrical

Conduit and Conduit Fittings

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

1 product