Screwz!!!

K

KuKu

Joined
Jun 25, 1999
Messages
178
Okay this is a newbie question...
What do the number mean on screws like 4-40 or 4/40?
Is there a metric system and can someone explain this to me?
 
It's just a standardized size of screw you have .080 4-40 6-32 mainly sae american thread's

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TbarK Custom Knives
http://vip.hpnc.com/~tbark Therefore I erge you brother's in view of God's Mercy to offer your body's as living sacrifices holy and pleasing to God-this is your spiritual act of worship Romans 12-1
 
The first number is the screw size, the second one is threads per inch. Metric works the same way.
Ever seen a 0000x90 screw? Tiny little suckers.
 
Screw size...You mean like the width of the shaft? So what size is good for different materials like steel, aluminum and Ti?
 
To hold the back end of two scales together. The scales will be made from Ti
 
OK-here goes:
The "size" or diameter of a screw establishes the strength of the screw-larger diameter=more cross sectional area and thus more strength in a given material.
Of course, screws made from stronger materials have more strength.
Threads per inch are just that. Smaller diameter screws have more threads per inch, because they must be finer. Generally, you can get a given size of screw with either fine or coarse threads. Fine threads are generally stronger, as they give more bearing area and aren't cut as deep into the diameter of the screw.

For your application, a 2-56 would probably work fine.

RJ Martin
 
Okay thanks a lot guys.
smile.gif
 
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