Overview of Threaded Fasteners

Provided by: ToolingU

Bolts and screws are both externally threaded fasteners. Bolts generally fit through unthreaded holes, while screws fit into threaded holes. Nuts are internally threaded fasteners used to tighten bolts. Washers are not threaded fasteners, but they are often used with screws and bolts. Certain nuts and washers provide extra locking action to ensure that joints stay tight. Threaded fasteners are the most commonly used fasteners. After taking this class, users will be able to identify many different types of threaded fasteners and describe how and when to use them. This familiarity serves as the foundation for learning how to properly select and assemble threaded fasteners, which leads to time and cost savings and prevents fastener failure.

Course Objectives:

  • Describe fasteners
  • Describe common threaded fasteners
  • Describe screws
  • Identify the parts of a screw
  • Describe common types of screws
  • Describe bolts
  • Describe common types of bolts
  • Describe common specialized bolts
  • Describe nuts
  • Describe washers
  • Describe locking fasteners
  • Describe common locking nuts
  • Describe common locking washers.

Recommended Background

  • Recommended for personnel working on the assembly line of a plant.

Course ID


Skill Focus

Smart Business



Employee Type

New Applicants, Operations teams, 1st level supervisor

Method of Delivery


Estimated Effort

2 hrs



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