ASME Screws | McMaster-Carr

With a deeper drive than flat and rounded head screws, socket head screws withstand more torque for a tighter hold. Install in a counterbored hole or above the surface.

Rounded Head Screws

A domed head sits above the surface of your material. Includes screws such as pan, button, binding, and truss head screws.

Hex Head Screws

Hex head screws are easy to install with a wrench for a secure hold. Use them with a nut or in tapped holes.

Flat Head Screws

Flat and oval head screws are angled under the head to fit in countersunk holes.

Hex Head Screws for Wood

These screws have a hex head for a secure grip with a wrench.

General Purpose Shoulder Screws

An undersized shoulder diameter allows these screws to fit most machinery and equipment. They're often used as an axle or pivot point.

Set Screws

Unlike screws that hold materials together with threads, set screws exert pressure at the tip to hold objects in place.

Square-Neck Carriage Bolts

The square neck keeps these bolts from turning when tightening a nut.

Square Head Screws

Large flat sides make these screws easy to grip with a wrench and keep them from rotating in square holes.

Hanger Bolts

Commonly used for wire guiding, hanging pipes and fixtures, and other tie-wire applications, hanger bolts have a flat end with a hole.

Square-Neck Flat Head Plow Bolts

Used on heavy equipment, such as plows, these bolts have a smooth head that's angled underneath to sit flush within countersunk holes. The square neck keeps these bolts from turning when tightening a nut.

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V-Belts

High-Capacity Narrow-Wedge V-Belts