What type of screw ?

What is the diffrence between a Thread forming screw use on plastic and metal ? I can't tell them apart . Can anyone , please enlighten me ?

Thanks in advance

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Some thread-forming screws are appropriate for use on either plastic or metal, depending on the specifics of the application.

*Generally* sheet metal screws are "pointy" and fasteners intended for plastic are blunt-nosed with a cutting notch on the end but there are many variations.
Rich Webb     Norfolk, VA
Reply to
Rich Webb

"Rich Webb"

** Often thread forming screws for plastic are " twin tread " too.

A real time & motion expert's favourite.....

.... Phil

Reply to
Phil Allison

screws for plastic have a notch at the tip and a blunt tip. screws for sheetmetal have a point or a triangular cross-section screws for thicker steel (over 1mm) have the notch too but are made of hard steel.

there's a bunch of other thread-forming screws too (like for brick, and self-drilling for steel sheet )

?? 100% natural
Reply to
Jasen Betts

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