M3 Screws | McMaster-Carr

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Thread Size

Length

System of Measurement

Fastener Head Type

Drive Style

Drilled Spanner

Spring Plunger Driver

Tamper-Resistant Hex

Tamper-Resistant Torx

Material

Stainless Steel

Thread Pitch

Finish

Neoprene Coated

Tin Zinc Plated

Titanium Carbon Nitride (TiCN) Coated

Zinc Flake Coated

Socket Head Profile

Threading

Partially Threaded

Threaded on Both Ends

Threaded on One End

Rounded Head Style

Thread Type

Metric Rounded Trapezoidal

Thread Spacing

Flat Head Profile

Specifications Met

Thread Direction

Fastener Strength Grade/Class

Countersink Angle

Screw Size

Shoulder Length

4 mm to 49.75 mm

RoHS

Compliant with Exemptions

REACH

DFARS Specialty Metals

Export Control Classification Number (ECCN)

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2,076 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

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish

Set Screws

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

Shoulder Screws

Shoulder Screws

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

Hex Head Screws

Hex Head Screws

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

Tighten and loosen by hand without the need for tools

Tapping Screws

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

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Studs

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

Single-End Studs

Single-End Studs

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

Standoffs

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

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

Threaded Rods

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

Spring Plungers

Spring Plungers

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

Power Transmission

Connecting Rods

Connecting Rods

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

Lead Screws and Nuts

Lead Screws and Nuts

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

Measuring and Inspecting

Transfer Punches

Transfer Punches

Mark the center of an existing hole onto a separate workpiece

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