M20 Bolts | McMaster-Carr

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System of Measurement

Thread Size

Length

Thread Pitch

Threading

Partially Threaded

Threaded on Both Ends

Fastener Strength Grade/Class

Fastener Head Type

Material

Stainless Steel

Finish

Hot-Dipped Galvanized

Zinc Yellow-Chromate Plated

Thread Spacing

Head Width

Specifications Met

Drive Style

External Square

Hex with Pilot Recess

Head Height

Socket Head Profile

Thread Type

Metric Rounded Trapezoidal

Metric Trapezoidal

Thread Direction

Right Hand and Left Hand

Color

Fluorescent Green

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

Thread Fit

Metric Class 4g6g

Metric Class 5g6g

Metric Class 6g

Metric Class 6h

Metric Class 6H

Metric Trapezoidal Class 7e

Metric Trapezoidal Class 7H

Metric Trapezoidal Class 8e

Drive Size

RoHS

Compliant with Exemptions

DFARS Specialty Metals

Export Control Classification Number (ECCN)

REACH

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544 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

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

Set Screws

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

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

Material Handling

Hoist Rings

Pivot to resist stress that would bend or break an eyebolt when lifting at an angle

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

U-Bolts

Anchor heavy pipe, tube, and conduit; stronger than routing clamps and hangers

Fabricating and Machining

Setup Studs

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

T-Slot Nuts

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

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