Screw it!!

[Jesus Malverde]

[Scuba]

1. Sex bolts - "used where a head is desired".

[siligut]

2. Coupling

Long nuts to connect male fasteners

[hermetic]

3. Nice

I have a sheet of paper mostly like that but it also has sizes on it. I lay it on the table and use it to sort my screws and such by size. Comes in handy.

[rodroc]

4. Awesome

That is a great picture. It is really helpful. I think I am going to print it and put it in my workshop.

Thanks
Regards
Rod
http://www.lakenormanseptic.com/

[Paper Roses]

5. Thanks, this is helpful to an old do-it-yourselfer! n/t

[IDemo]

6. A stupid question on screwing

I need to place several threaded holes in some large aluminum heatsinks. These are needed to mount some power resistors with 1/8" mounting holes. I've looked at several charts to try to determine which size of bit to use prior to thread-tapping them but can't quite grasp the terminology. "Just a bit* smaller" doesn't seem quite scientific enough, though.

This chart shows what appears to my mind as inverse numbers, which make it look like I'm to drill a larger hole than the thread diameter.

Screw size-4, major diameter-.112, clearance hole-.125

Thanks for any replies.

* pun intended