Basic Characteristics Of Fasteners

Variety and diverse applications: Fasteners include bolts, studs, screws, nuts, washers, retaining rings, pins, rivets, self-tapping screws, wood screws, weld studs, as well as assemblies and connecting pairs, covering 12 major categories. Each type is designed for different connection needs, such as removable connections (bolts, screws) or permanent connections (rivets).

Highly standardized, series-based, and generic: The vast majority of fasteners follow national standards (such as China's GB standards) and international standards (such as ISO standards), with unified specifications for dimensions, mechanical performance, and materials, facilitating interchangeability and large-scale production.

Diverse materials with strong adaptability: Besides ordinary carbon steel, stainless steel (such as austenitic, martensitic, and ferritic types) is an important material, offering excellent corrosion resistance and durability, and is widely used in precision machinery, chemical, marine, and other harsh environments.

Connection methods can be removable or non-removable: Bolts, screws, and nuts achieve removable connections through threads, while rivets and weld studs form permanent connections through plastic deformation or welding.

Prone to specific failure modes: Especially with materials like stainless steel and titanium alloys, threads may 'seize' (adhesion phenomenon) due to pressure or heat during installation. This requires lubrication and careful control of insertion speed and angle to prevent.

These characteristics make fasteners indispensable fundamental components in almost all industrial fields, including machinery, electronics, construction, and transportation.