ASME Hex Head Cap Screws | McMaster-Carr

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Specifications Met

ASME B18.2.3.1M

ASME B18.2.3.9M

System of Measurement

Thread Size

Length

Material

651 Silicon Bronze

Stainless Steel

Threading

Partially Threaded

Fastener Head Type

Fastener Strength Grade/Class

ASTM Grade A325

Finish

Black Zinc Plated

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Head Width

Thread Spacing

Thread Direction

Thread Type

Drive Style

Tamper-Resistant Hex

Head Height

Grip Length

Screw Features

Screw Size

Tensile Strength

Less than 100,000 psi

100,000 psi to 109,999 psi

110,000 psi to 129,999 psi

130,000 psi to 149,999 psi

150,000 psi or greater

Socket Head Profile

Thread Fit

Metric Class 4g6g

Metric Class 5g6g

Metric Class 6g

Metric Class 6h

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

DFARS Specialty Metals

Thread Length

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

REACH

How can we improve?

11,730 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

Rounded Head Screws

Rounded Head Screws

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

Flat Head Screws

Flat Head Screws

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

Tapping Screws

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

Wood Screws

Fasten material to wood or pieces of wood to each other

Shoulder Screws

Shoulder Screws

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

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