I'm looking for some screws for use in production work.
I've seen screws like in the links below but am having trouble finding them. When I look for self tapping screws I find the coarse thread type rather than the defined M4x0.7 or M5x0.8 threads.
Is there a proper name for these screws:
Thanks.
I'm getting closer.
Some seem to be called Taptite,
And others "Type 23"
This Fastnal document may help:
Go to page 59 and look over the "Types of Screw Points". The "Tri-lobular" point may work for your needs too...
Google on "thread cutting screws". Even Amazon sells them :-)
Yep - thats them. Thanks.
Thanks John
They are called thread forming screws.
On jobsites, I've just heard them called tappets.
More likely Tappits. - but PK Tappits are used in sheet metal 0 they are NOT thread forming screws.
Must be regional, in Oz, Tappits are plastic plugs with a nail in them that are used for hanging pictures or affixing to brick or concrete walls.
Yeah, I've seen those and wondered what they were called.
Yup, that sure looks like the type you wanted. I've been using Type
17 self-tapping deck screws in the recent past.
Note - I qualified my statement with the brand - PK Tappits is a registered trademark.
Those taptites are thread forming scres.
Those type23 scres are thread cutting screws.
Recently, I've had a rash of blast media (small clear crystals) in the philips head slots of micronized galv deck screws. They're also too hard, breaking where the thread and shank meet or up next to the bugle head. A few out of a 25# box isn't much to consider, but sometimes it was a few out a single handful of screws.
Yesterday's client wanted me to use an EasyGate kit. One of the included screw's head was missing the philips depression altogether. I guess you're supposed to drive those in like nails, eh?
So that's why they call a hammer an Amercan Screwdriver.
Of course you put screws in with a hammer. The slots in the head are only there to take them out :-)
Yep, I did. ;)
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