Threaded Fastener Testing and Defects

Fasteners: Threaded Fastener Testing and Defects introduces learners to both the mechanical properties of threaded fasteners and failure modes that might occur in service. The way in which threaded fasteners perform in service is the most crucial requirement for both manufacturers and purchasers of threaded fasteners, especially in safety-critical applications.


Learning Objectives

  • Identify the mechanical properties that are most relevant to threaded fasteners.
  • Recall the prominent failure modes that threaded fasteners might encounter in service.
Course Length: 1.5 HRS

Table of Contents

Threaded Fastener Mechanical Properties

  • Yield Strength
  • Tensile Strength
  • Proof Load
  • Hardness
  • Hardenability
  • Shear Strength
  • Torque

Failure Modes

  • Overloading
  • Underloading
  • Liquid Metal Embrittlement (LME)
  • Improper Fastener Length
  • Surface Discontinuities
    • Cracks
    • Bursts
    • Seams

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