External Hex Fasteners | McMaster-Carr

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Stainless Steel

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ASTM Grade A325

ASTM Grade A490

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Black Zinc Plated

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Metric Class 6G

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Metric Class 6H

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Unified Standard Class 3B

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23,189 Products

Fastening and Joining

Hex Head Screws

Hex Head Screws

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

11,145 products

Tapping Screws

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

Fastener Assortments

Fastener Assortments

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

Wood Screws

Fasten material to wood or pieces of wood to each other

Concrete Screws

Concrete Screws

Anchor parts to concrete, block, and brick without tapping the hole first

Joint Clamps for Wood

Joint Clamps for Wood

Make secure joints between boards, butcher blocks, and countertops

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

Hex Nuts

Handle most general fastening needs

Locknuts

Hold fasteners in place to prevent loosening from vibration

Panel Nuts

Extremely thin for tight spots such as electrical panels; also known as dress nuts

Flange Nuts

The flange distributes pressure, so you don't need a washer

Coupling Nuts

Connect and extend threaded rods

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

Tamper-Resistant Nuts

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

Split Nuts

Swivel to attach at any point on a threaded rod for quick installation

Push-Button Nuts

Push-Button Nuts

Disengage the threads to quickly slide along threaded rods

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

Easy to tighten and loosen by hand for making frequent adjustments

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Push Nuts

Press onto threads for a light duty hold that’s faster to install than typical nuts

Anchors

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

Building and Machinery Hardware

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

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

Fixture Clamps

Secure your workpiece to a fixture table so it won't move during machining

Material Handling

Turnbuckle Nuts

Turnbuckle Nuts

Tighten against a turnbuckle body to prevent the end fitting from unscrewing

Hoist Rings

Pivot to resist stress that would bend or break an eyebolt when lifting at an angle

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