What Are the Differences Between Bolts, Screws, and Hi-Lok Fasteners?

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SUMMARY

The discussion clarifies the distinctions between bolts, screws, and Hi-Lok fasteners. Bolts are typically used with nuts and require a pre-drilled hole, while screws are self-tapping and can be driven directly into materials. Hi-Lok fasteners are specifically designed for aircraft structures, featuring a unique locking mechanism and various oversize options. The standard increments for nominal sizes and oversizes are critical for ensuring structural integrity in aerospace applications.

PREREQUISITES
  • Understanding of fastener types: bolts, screws, and Hi-Lok fasteners
  • Knowledge of aerospace engineering standards and specifications
  • Familiarity with mechanical fastening techniques
  • Basic comprehension of material properties and structural integrity
NEXT STEPS
  • Research Hi-Lok fastener specifications on the Hi-Shear website
  • Study the differences in applications between bolts and screws in mechanical engineering
  • Explore the standards for aerospace fasteners, including oversize specifications
  • Learn about the installation techniques for Hi-Lok fasteners in aircraft structures
USEFUL FOR

Aerospace engineers, mechanical engineers, and anyone involved in aircraft assembly and maintenance will benefit from this discussion.

stan19
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First question: Whats the difference between bolt and screw?Any expert can give some reference info about it?


Second Q: Hi-Lok is commonly use on aircraft structure. Anyone can give more info about the spec of it? such as oversizes? how many oversizes are there for a norminal size? what's the increment of norminal size as well oversizes.

Thank you, i need all these answer for license interview
 
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