Square Head Bolts

Square head bolts, also known as square bolts, have a distinctive square-shaped external wrenching head, which provides a generous bearing area, ensuring a secure and reliable grip during fastening. Hex head bolts have surpassed them in popularity, but square head bolts were once the industry standard.

Frequently Asked Questions About Square Head Bolts:

What is a square head bolt used for?

They are often used in contemporary construction and design to evoke a timeless look or to seamlessly match existing fasteners in older structures.

Why would I choose a square head bolt instead of a hex bolt?

Square bolts often have a more aesthetic appeal than hex bolts, evoking a distinctly rustic charm. If you’re doing repairs to an older structure, they often also match the existing fasteners more seamlessly.

What sizes are available for square head bolts?

AFT offers sizes ranging from 1/4” to 1-1/2” diameters, and lengths from 1” to 17”.

What materials and finishes do square head bolts come in?

We offer a large selection square head bolts in steel, both partially and fully threaded. They are available in plain, zinc, and hot dipped galvanized finishes. The latter offers the most corrosion resistance for harsh environments.

How do I measure a square head bolt?

There are three core dimensions involved in measuring a square head bolt: the shaft diameter, the length from the square head to the tip, and the head from side to side.