M4 Bolts | McMaster-Carr

Filter by

System of Measurement

Thread Size

Length

Fastener Head Type

Material

Stainless Steel

Drive Style

Drilled Spanner

Hex with Pilot Recess

Spring Plunger Driver

Tamper-Resistant Hex

Tamper-Resistant Torx

Thread Pitch

Threading

Partially Threaded

Threaded on Both Ends

Threaded on One End

Finish

Neoprene Coated

Phosphate Coated

Tin Zinc Plated

Titanium Carbon Nitride (TiCN) Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Socket Head Profile

Head Height

Thread Type

Metric Rounded Trapezoidal

Metric Trapezoidal

Thread Direction

Specifications Met

Fastener Strength Grade/Class

Thread Spacing

Rounded Head Style

Color

Flat Head Profile

Screw Size

Tensile Strength

Less than 10,000 psi

10,000 psi to 19,999 psi

20,000 psi to 29,999 psi

30,000 psi to 99,999 psi

100,000 psi or greater

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

How can we improve?

2,553 Products

Fastening and Joining

Socket Head Screws

Socket Head Screws

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

Rounded Head Screws

Rounded Head Screws

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

Hex Head Screws

Hex Head Screws

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

Flat Head Screws

Flat Head Screws

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

Tighten and loosen by hand without the need for tools

Shoulder Screws

Shoulder Screws

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

Tapping Screws

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

Oval Head Screws

Oval Head Screws

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

Set Screws

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

Studs

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

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Rivet Nuts

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

Weld Nuts

Weld to metal surfaces to add permanent threads

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Binding Barrels

Binding Barrels

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

Threaded Rods

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

Single-End Studs

Single-End Studs

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

Standoffs

Separate, position, or connect components in assemblies

Spring Plungers

Spring Plungers

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

Magnets

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

Power Transmission

Precision Lead Screws and Nuts

Precision Lead Screws and Nuts

Pair with a motor for accurate starts and stops in automated motion and positioning applications

Connecting Rods

Connecting Rods

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

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

Lead Screw Collars

Lead Screw Collars

Position components and limit travel along a lead screw

Ball Screw Nuts

Ball Screw Nuts

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

Fabricating and Machining

T-Slot Nuts

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

Setup Studs

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

Fixture Clamps

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

Clamp Holding Screws

Clamp Holding Screws

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

Building and Machinery Hardware

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

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

Cam Handles

For fast clamping, push down on the handle to draw two parts together

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)