External Drive Hex Head Screws | McMaster-Carr

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System of Measurement

Thread Size

Length

Material

651 Silicon Bronze

Ceramic Alumina

Grade 5 Titanium

Stainless Steel

Threading

Partially Threaded

Fastener Head Type

Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

Finish

Black Zinc Plated

Corrosion-Resistant Coated

Galvanic Barrier Coated

Hot-Dipped Galvanized

Phosphate Coated

Ultra-Corrosion-Resistant Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Head Width

Drive Style

Hex with Pilot Recess

Tamper-Resistant Hex

Screw Features

Tension Indicating

Thread Spacing

Head Height

Thread Pitch

Thread Type

Thread Direction

Specifications Met

Fed. Spec. FF-S-85

Screw Size

Tensile Strength

Less than 100,000 psi

100,000 psi to 109,999 psi

110,000 psi to 119,999 psi

120,000 psi to 129,999 psi

130,000 psi or greater

Thread Fit

Metric Class 6g

Metric Class 6h

Metric Class 6H

Unified Standard Class 2A

Unified Standard Class 2B

Unified Standard Class 3A

Grip Length

DFARS Specialty Metals

Color

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

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12,590 Products

Fastening and Joining

Hex Head Screws

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

10,653 products

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

Fastener Assortments

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

Shoulder Screws

Shoulder Screws

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

Set Screws

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

Tighten and loosen by hand without the need for tools

Joint Clamps for Wood

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

Anchors

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

Building and Machinery Hardware

Protective Plugs

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

Power Transmission

Lead Screws

Pair with lead screw nuts to move components in a straight line

Electrical

Electrical Enclosure Fasteners

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

Fabricating and Machining

Clamping Screws

Clamping Screws

Apply pressure through a flat-tipped screw to hold material in place

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