ASTM Standard Screws | McMaster-Carr

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System of Measurement

Thread Size

Length

Fastener Head Type

Finish

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Threading

Partially Threaded

Drive Style

External Square

Tamper-Resistant Hex

Tamper-Resistant Torx

Socket Head Profile

Material

Grade 2 Titanium

Stainless Steel

Head Diameter

Head Height

Drive Size

Thread Type

Metric Trapezoidal

Thread Direction

Thread Spacing

Tensile Strength

10,000 psi to 19,999 psi

30,000 psi to 99,999 psi

100,000 psi or greater

Shoulder Length

Flat Head Profile

Shoulder Diameter

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

Rounded Head Style

DFARS Specialty Metals

REACH

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

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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

Rounded Head Screws

Rounded Head Screws

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

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

Set Screws

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

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

Captive Panel Screws

Captive Panel Screws

Secure panels and enclosures while still having access to them

Hanger Bolts

Suspend pipe and other fixtures with wire or cable ties

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

Threaded to separate or connect parts as well as position 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

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

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.)