Square Bolts, also known as a square head bolt or machine bolt, is a fastener with a four-sided head and a threaded shank: Square bolts are different from most other bolts, which have a six-sided hexagonal head. Square bolts are often used in situations where other tools are difficult to use, such as in close quarters or blind areas. They are also aesthetically pleasing and can be used to match existing fasteners in older structures.
Here are some of the benefits of square bolts: Grip: The square head provides a better grip for quick tightening.
Ease of use: Square bolts can be driven easily with an adjustable wrench, even in tight spaces.