ASTM Standard Screws | McMaster-Carr

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System of Measurement

Thread Size

Length

Finish

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Fastener Head Type

Threading

Partially Threaded

Drive Style

External Square

Tamper-Resistant Hex

Tamper-Resistant Torx

Material

Grade 2 Titanium

Stainless Steel

Socket Head Profile

Head Diameter

Drive Size

Head Height

Thread Type

Metric Trapezoidal

Thread Direction

Tensile Strength

10,000 psi to 19,999 psi

30,000 psi to 99,999 psi

100,000 psi or greater

Thread Spacing

Thread Fit

Metric Class 4g6g

Metric Class 5g6g

Metric Class 6g

Metric Class 6h

Metric Class 6H

Metric Trapezoidal Class 7e

Unified Standard Class 1A

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Flat Head Profile

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

Screw Size

Color

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

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15,354 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

Flat Head Screws

Flat Head Screws

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

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

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

Wood Screws

Fasten material to wood or pieces of wood to each other

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Square Head Screws

Square Head Screws

Turn the large flat sides with a wrench into square holes that stop further rotation

Threaded Rods

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

Standoffs

Separate, position, or connect components in assemblies

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Anchors

Secure anything from signs to heavy machinery in concrete, brick, and drywall

Screwdrivers

Tighten and loosen screws

T-Handle Keys

To turn fasteners in hard-to-reach spots, there's a long shaft and a grip for your whole hand

Power Transmission

Lead Screws and Nuts

Lead Screws and Nuts

Move components in a straight line in clamping and heavy duty lifting and lowering applications

Material Handling

Eyebolts

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

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