External hexagonal screw, also known as external hexagonal
bolt (also known as external hexagonal screw, different from person to
person), is generally used with hexagonal nut, cushion, flat cushion, as
a fastening connection of two connected parts with through holes, used
as components, can also be used alone, combination because of changing
needs, mostly used for various large-scale equipment or other
engineering purposes. Scope of application: environmental protection equipment,
medical equipment, communication equipment, power facilities, electronic
products, food machinery, petrochemical industry, ship assembly, pump
and valve pipelines, building curtain wall, open-air occasions, etc.