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

[stan19]

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

 

[FredGarvin]

Question 1:
https://www.physicsforums.com/showpost.php?p=1160829&postcount=11

Question 2:
http://www.hi-shear.com/fastener_hl_stds.htm
http://www.gen-aircraft-hardware.com/template.asp?pagename=hiloks