The name of the belt fastener depends on the type of fastener being used. Belts are often fastened using various types of mechanisms, each with its own name and specific use. Here are some of the most common types of belt fasteners:

1. Buckle: A buckle is the most common type of conveyor belt clamp fastener fastener. It consists of a metal or plastic frame with a prong or tongue that is inserted into a hole in the belt to secure it in place. Buckles come in various shapes and sizes, including rectangular, circular, and square, and are often made of materials like brass, stainless steel, or plastic.

2. Snap: A snap fastener, also known as a press stud, is a type of fastener that consists of two interlocking discs that snap together to secure the belt in place. Snaps are commonly used on leather belts and are often made of brass or nickel-plated brass.

3. Hook and loop: Hook and loop fasteners, also known as Velcro, consist of two strips of material, one with tiny hooks and the other with loops. When the two strips are pressed together, the hooks attach to the loops, creating a secure fastening. Hook and loop fasteners are often used on belts for children's clothing and sports uniforms.

4. D-ring: A D-ring is a type of belt fastener that consists of a metal ring, shaped like the letter "D," that is attached to the belt. The end of the belt is threaded through the ring, and the loose end is pulled back and secured against the belt with a buckle or other type of fastener.

5. Clasp: A clasp fastener consists of two metal or plastic pieces that interlock to secure the belt in place. Clasps are often used on braided or woven belts and can be made in a variety of shapes and sizes.

6. Stud: A stud fastener is a type of fastener that consists of a metal or plastic piece that is attached to the belt and a corresponding hole or slot in the other end of the belt. The stud is inserted into the hole or slot to secure the belt in place. Studs are often used on belts for women's clothing and accessories.

In conclusion, the name of the belt fastener depends on the specific type of fastener being used. Some of the most common types include buckle, snap, hook and loop, D-ring, clasp, and stud fasteners. Each of these fasteners has its own unique features and uses, and choosing the right one depends on the type of belt and the desired level of security and ease of use.