A flange bolt is a type of bolt that is used to secure two flanges together. Flanges are circular plates with holes in them that are used to connect pipes, valves, and other mechanical components. Flange bolts have a large, flat head and a washer-like flange that helps to distribute the load and prevent the bolt from pulling through the flange holes. China Flange Bolts are typically used in high-stress applications, such as in the construction of bridges and other structures, and in the oil and gas industry. Custom Flange Bolts are available in a variety of materials, including carbon steel, stainless steel, and titanium, and are usually used with a matching nut.

A hex bolt is a type of bolt with a hexagonal head, which is designed to be tightened with a wrench or a socket. Hex bolts are also known as hex cap screws or machine screws. They are commonly used in a variety of applications, including construction, automotive, and machinery. Hex bolts are available in a range of sizes, materials, and grades, which determine their strength and corrosion resistance. Grade 2 hex bolts are made of low or medium carbon steel and are the most common type. Grade 5 and grade 8 hex bolts are made of medium carbon steel and are stronger and more durable. China Hex Bolt are also available for applications where corrosion resistance is important.