McMaster-Carr

Made to Japanese Industrial Standards, these Class 10.9 steel screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. The flange eliminates the need for a washer.

High-Strength Steel
Flanged Hex Head Screws

These screws are at least 25% stronger than medium-strength steel screws. Use them in high-stress applications such as valves, pumps, motors, and automotive suspension systems. The flange distributes pressure over the surface, so a separate washer is not necessary.

Medium-Strength Steel
Flanged Hex Head Screws

These screws are suitable for fastening most machinery and equipment. Includes Grade 5 and metric Class 8.8 screws. A flange distributes pressure where the screw meets the surface, so there's no need for a separate washer.

Serrated-Flange Hex Head Screws

Serrations under the head grip the material's surface for mild vibration resistance. The flange distributes pressure across the material's surface, eliminating the need for a separate washer.

Rounded Head Screws

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

12-Point Screws

The head makes 12 points of contact with a wrench to handle more torque than a socket head or hex head screw.

Socket Head Screws

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.

Threaded Rods and Studs

Medium-Strength
Steel Threaded
Rodsâ€”Grade B7

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Screws and Bolts

JIS High-Strength SteelFlanged Hex Head Screws

High-Strength SteelFlanged Hex Head Screws

Medium-Strength SteelFlanged Hex Head Screws