M4 Screws | McMaster-Carr

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2,524 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

338 products

Rounded Head Screws

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

591 products

Flat Head Screws

Fit in countersunk holes for a flush finish

305 products

Hex Head Screws

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

65 products

Set Screws

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

199 products

Shoulder Screws

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

293 products

Thumb Screws

Tighten and loosen by hand without the need for tools

56 products

Tapping Screws

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

23 products

Oval Head Screws

A decorative, domed head sits above the surface when installed

18 products

Captive Panel Screws

Secure panels and enclosures while still having access to them

28 products

Studs

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

42 products

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

4 products

Binding Barrels and Screws

Thread together for a low-profile fastener

24 products

Thread Adapters

Join threads of a different type, size, and gender

252 products

Rivet Nuts

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

31 products

Weld Nuts

Weld to metal surfaces to add permanent threads

15 products

Single-End Studs

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

7 products

Standoffs

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

109 products

Threaded Rods

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

36 products

Spring Plungers

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

8 products

Magnets

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

2 products

Building and Machinery Hardware

Knobs

Position, tighten, and secure fixtures and equipment

1 product

Pull Knobs

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

14 products

Power Transmission

Lead Screws and Nuts

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

29 products

Connecting Rods

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

9 products

Fabricating and Machining

Setup Studs

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

4 products

Fixture Clamps

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

10 products

Measuring and Inspecting

Transfer Punches

Mark the center of an existing hole onto a separate workpiece

1 product