M8 Screws | McMaster-Carr

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3,110 Products

Fastening and Joining

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

361 products

Hex Head Screws

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

524 products

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

278 products

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

206 products

Shoulder Screws

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

317 products

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

240 products

Thumb Screws

Tighten and loosen by hand without the need for tools

53 products

Carriage Bolts

A smooth head provides a finished look while a square neck keeps the bolt in place when using a nut

27 products

12-Point Screws

12 contact points handle more torque than a hex head while a flange eliminates the need for a washer

5 products

Tapping Screws

Fasten a range of materials together without needing to tap the hole first

5 products

Wood Screws

Fasten material to wood or pieces of wood to each other

16 products

Studs

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

36 products

Oval Head Screws

The domed top sits slightly above the surface of countersunk holes for a decorative look

12 products

Captive Panel Screws

Secure panels and enclosures while still having access to them

5 products

Elevator Bolts

Create a flush joint to allow movement in tight spaces such as grain elevators and belting systems

14 products

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

4 products

Rivet Nuts

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

44 products

Weld Nuts

Weld to metal surfaces to add permanent threads

25 products

Threaded Rods

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

149 products

Thread Adapters

Join threads of a different type, size, and gender

471 products

Binding Barrels and Screws

Thread together for a low-profile fastener

13 products

Single-End Studs

Use the unthreaded end as a pivot point, hinge, shaft, or locator pin

7 products

Spring Plungers

Apply accurate, consistent pressure for positioning, indexing, and ejecting parts

25 products

Standoffs

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

1 product

Anchors

Secure anything from signs to heavy machinery in concrete, brick, and drywall

1 product

Magnets

Attract or repel metal objects to hang, secure, or position them

8 products

Fabricating and Machining

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

Grippers

Clamp against uneven or irregularly shaped parts such as castings for a secure hold

2 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

8 products

Clamp Holding Screws

Replace worn holding screws in clamps or customize with different sizes or styles

3 products

Building and Machinery Hardware

Knobs

Position, tighten, and secure fixtures and equipment

38 products

Pull Knobs

Use a knob to open and close cabinets, drawers, and doors

3 products

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

30 products

Protective Feet

Add to furniture and light equipment to protect floors from scratches and wear

2 products

Power Transmission

Lead Screws and Nuts

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

14 products

Ball Screws and Nuts

Provide smooth travel where high speeds, accurate positioning, and repeatable movement are required

4 products

Connecting Rods

Use with rod ends and swivel joints to link components in push/pull assemblies

57 products

Material Handling

Eyebolts

Route rope through the loop or attach hooks and shackles for lifting

10 products

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

6 products

Conveyors

Roller, skate wheel, ball transfer, belt, and vacuum conveyors

12 products

Measuring and Inspecting

Transfer Punches

Mark the center of an existing hole onto a separate workpiece

1 product