M4 Bolts | McMaster-Carr

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System of Measurement

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Length

Material

Fastener Head Type

Drive Style

Hex with Pilot Recess

JIS

Phillips

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Tamper-Resistant Hex

Tamper-Resistant Torx

Thread Pitch

Threading

Threaded on Both Ends

Finish

Titanium Carbon Nitride (TiCN) Coated

Zinc Flake Coated

Zinc Plated

Zinc Yellow-Chromate Plated

Socket Head Profile

Head Height

Thread Type

Metric Rounded Trapezoidal

Specifications Met

Fastener Strength Grade/Class

Thread Direction

Thread Spacing

Rounded Head Style

Tensile Strength

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

Not Rated

Screw Size

Color

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

1C998

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

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2,561 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

349 products

Rounded Head Screws

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

596 products

Hex Head Screws

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

103 products

Flat Head Screws

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

310 products

Thumb Screws

Tighten and loosen by hand without the need for tools

58 products

Shoulder Screws

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

316 products

Oval Head Screws

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

18 products

Tapping Screws

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

23 products

Set Screws

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

199 products

Studs

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

42 products

Captive Panel Screws

Secure panels and enclosures while still having access to them

31 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

37 products

Weld Nuts

Weld to metal surfaces to add permanent threads

15 products

Binding Barrels

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

24 products

Thread Adapters

Join threads of a different type, size, and gender

184 products

Threaded Rods

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

36 products

Single-End Studs

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

7 products

Standoffs

Separate, position, or connect components in assemblies

109 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

Power Transmission

Precision Lead Screws and Nuts

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

29 products

Connecting Rods

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

9 products

Rod Ends

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

5 products

Lead Screw Collars

Position components and limit travel along a lead screw

1 product

Ball Screw Nuts

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

1 product

Fabricating and Machining

T-Slot Nuts

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

2 products

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

14 products

Clamp Holding Screws

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

3 products

Building and Machinery Hardware

T-Slotted Framing Fasteners

Secure brackets and other accessories to T-slotted rails

21 products

Cam Handles

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

3 products