Effect of Self-Locking Nuts on Torque-Tension Relationship

Abstract

Testing was conducted to determine torque-tension relationship for self-locking nuts. The test results indicated that torque wrench method is not accurate for determining preload when fasteners are preloaded to 75-80 percent of their ultimate tensile strength. The accuracy of torque wrench method deteriorates even more if fasteners are used for more than one cycle application. There was also significant difference in preload between all metal nuts and nuts with nonmetallic insert. The fastener preload variation decreased with larger fasteners.

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Document Details

Document Type
Technical Report
Publication Date
Dec 29, 1975
Accession Number
ADA024893

Entities

People

  • M. J. Zurko

Organizations

  • Naval Air Warfare Center Warminster

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Aerial Warfare
  • Aircraft Industry
  • Aircrafts
  • Classification
  • Coefficients
  • Fasteners
  • Fatigue Life
  • Friction
  • Lubricants
  • Military Standards
  • Navy Aircraft
  • Reliability
  • Solid Lubricants
  • Standards
  • Tensile Strength
  • Vehicles

Readers

  • Electrical Engineering
  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.