High-Strength Bolts | McMaster-Carr

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System of Measurement

Thread Size

Length

Threading

Partially Threaded

Fastener Strength Grade/Class

ASTM Grade A490

Fastener Head Type

Material

Grade 5 Titanium

Stainless Steel

Finish

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Head Width

Thread Pitch

Thread Spacing

Drive Style

External Square

Tensile Strength

Less than 130,000 psi

130,000 psi to 149,999 psi

150,000 psi to 169,999 psi

170,000 psi or greater

Head Height

Specifications Met

Fed. Spec. FF-S-86

Thread Direction

Thread Type

Thread Fit

Metric Class 6g

Metric Class 6h

Unified Standard Class 2A

Unified Standard Class 3A

Grip Length

DFARS Specialty Metals

Screw Size

Hardness

RoHS

REACH

Export Control Classification Number (ECCN)

Head Diameter

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4,565 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

Carriage Bolts

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

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

Flat Head Screws

Flat Head Screws

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

Square Head Screws

Square Head Screws

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

Tapping Screws

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

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