Hardware

[Anonymous]

What is difference between Type 1 and Type 1A screws?

[jalger]

Hi Kevin,

It has to do with the top (the head of the screw).

Type 1 is a normal phillips

Type 1a is "Star" Phillips (it has extra cuts for a smaller phillips screw driver)

Here is a link for it: look for the Drives Section (PH and PZ are the other reference names for them)

http://www.pencomsf.com/screws-categories/screw-design-guide/

I hope this helps,

James

[jalger]

One small correction for the Type 1A:

The Smaller cuts are not for smaller phillips (although I'm 100% guilty of using a smaller screwdriver on them...LOL)

Its for the special Star cut Phillips (it gives better torque, and appearently has less chance of striping)

Regards,

James