Hexagonal bolts, commonly known as hex bolts or hex head bolts, are fasteners designed with a hexagonal head on one end and a threaded shaft on the other. They are widely used in various industries and applications due to their versatility and reliable fastening capabilities. Here’s a description of hexagonal bolts:
Head: The hexagonal head of the bolt features six flat sides, forming a hexagon shape. It is designed to be easily tightened or loosened using a wrench or socket. The head provides a large contact surface for applying torque during installation or removal.
Threaded Shaft: The threaded shaft extends from the head and allows the bolt to be securely fastened into a threaded hole or nut. The threads may follow different standards such as UNC (Unified National Coarse) or UNF (Unified National Fine) depending on the application.
Material: Hexagonal bolts are available in a variety of materials to suit different requirements. Common materials include carbon steel, stainless steel, and alloy steel. The choice of material depends on factors such as strength requirements, corrosion resistance, and environmental conditions.
Size and Dimensions: Hexagonal bolts come in various sizes and lengths, typically measured by their diameter (d) and length (L). The diameter is the measurement across the flat sides of the bolt head, and the length refers to the distance from the bottom of the head to the end of the threaded shaft.
Thread Type: Hexagonal bolts can have different thread types, such as UNC (coarse thread) or UNF (fine thread). The thread type determines the pitch (number of threads per inch) and affects the engagement and performance of the bolt when fastened.
Strength Grade: Hexagonal bolts are often marked with strength grade markings such as ASTM A307, ASTM A325, or ASTM A490. These markings indicate the specific strength and performance characteristics of the bolt, ensuring it meets the required load-bearing capacity for the intended application.
Applications: Hexagonal bolts are used in a wide range of applications, including construction, automotive, machinery, appliances, and infrastructure. They are commonly employed to join components together, secure structures, or provide a means for disassembly when necessary.