Hello to all engineers reading to this thread..I really need your help..

I am conducting a research through my class about the given questions of my instructor and with this questions,it really gives me time to research on it,so I'm asking for your help if you know this questions..

1.Draw's and Names Of Threads Commonly Used On Valve Spindles.

2.Describe Locking By Giving Application:
a.Adhesive
b.Peening

3.Identify the ff.Rivets Head
-Snap -Universal
-Flat -Counter Sunk.


Hope you can help me with this...thanks guys..god bless you all.