M10 Square Head Bolt

Square Head Bolt Description

The head design of square head bolts enables an easier wrench grip for nut tightening. They are usually used in new construction to mimic an older aesthetic or in railway applications.


The square, external wrenching head found on a square head bolt offers a large bearing area for positive gripping. At one time, square head bolts (aka square bolts) were the industry standard before being replaced by hex head bolts. Now, they are commonly chosen for aesthetic reasons to create a rustic look in new buildings or to match existing fasteners in an old building.


As a square bolt supplier, STARWDH offers a huge selection of fully threaded and partially threaded bolts with bolt sizes ranging from 1/4” up to 1-1/2”, and lengths from 1” up to 17”. Our square head bolts are available in plain, zinc, and hot dipped galvanized – which offers the most corrosion-resistance for harsh environments. As always, please contact us today if you can’t find the exact products you need.