What kind of latch is this? Draw, compression, etc? (see photo)?

Question:http://www.mizengineering.com/productsho...

I want to latch a piece of acrylic to fiberglass and have it "drawn in" to make a suction seal flat. I need very small latches in diameter and the ability to hand-tighten. Thank you.

Answers:
That picture doesn't look like a latch? It looks more like a handle that turns an eight of a turn to pull in a latch.

I would suggest you Google Marine hardware?