Zhuocheng BLACK 12.9 HIGH STRENGTH SQUARE BOLT

Square head bolts, also called machine bolts are threaded to receive a nut. These decorative bolts come in smooth, hammered and pyramid head styles.

The usual diameter of the square head machine bolt is 3/8inch, 1/2inch, 5/8inch, and 3/4inch. The length of the square head machine bolt is according to the application. The widely used length is 2inch, 3inch, 10inch, 12inch, 14inch.

The square heads of square head bolts provide more surface area, which makes it possible to tighten them with greater force without stripping or breaking the bolt. This characteristic has made them popular in applications where torque is necessary for securing equipment and heavy machinery.

Square head bolts are used in applications where visibility is limited but durable fastening is required. These bolts have large, flat sides and are easy to tighten with a wrench. Square heads are best used in tight or dark spaces where a machinist or fabricator must tighten the bolt blind.