M20 Screws | McMaster-Carr

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System of Measurement

Thread Size

Length

Thread Pitch

Threading

Partially Threaded

Threaded on Both Ends

Fastener Head Type

Fastener Strength Grade/Class

Material

Stainless Steel

Finish

Hot-Dipped Galvanized

Zinc Yellow-Chromate Plated

Socket Head Profile

Thread Spacing

Specifications Met

Drive Style

External Square

Hex with Pilot Recess

Head Height

Head Width

Thread Type

Metric Rounded Trapezoidal

Metric Trapezoidal

Thread Direction

Right Hand and Left Hand

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

Head Diameter

Drive Size

Color

Thread Fit

Metric Class 4g6g

Metric Class 5g6g

Metric Class 6g

Metric Class 6h

Metric Trapezoidal Class 7e

Metric Trapezoidal Class 7H

Metric Trapezoidal Class 8e

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

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515 Products

Fastening and Joining

Hex Head Screws

Hex Head Screws

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

Socket Head Screws

Socket Head Screws

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

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

Carriage Bolts

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

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

Lead Screws and Nuts

Lead Screws and Nuts

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

Ball Screws and Nuts

Ball Screws and Nuts

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

Connecting Rods

Connecting Rods

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

Roller Screws and Nuts

Roller Screws and Nuts

More contact points to move heavier loads than ball and lead screw assemblies

Fabricating and Machining

Setup Studs

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

Fixturing Kits

Everything needed to mount workpieces of different sizes to your machine table

Material Handling

Eyebolts

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

Eye Nuts

Pair with bolts or threaded rod to lift and hang components

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.)