On Fri, 26 Jun 2015 13:06:28 +0800, Techman
wrote:

On 26-Jun-15 6:15 AM, wrote:
On Thu, 25 Jun 2015 13:50:45 -0700, Gunner Asch
wrote:

On Thu, 25 Jun 2015 12:05:20 -0700 (PDT), wrote:

On Thursday, June 25, 2015 at 12:26:59 PM UTC-4, Clare wrote:
On Thu, 25 Jun 2015 15:37:07 +0800, Techman
wrote:

I'm looking for some screws for use in production work.

*Sick of tapping lots of M4 and M4 holes.
*Used for attaching small brackets and DIN rail etc.
*Fixing to to mild steel 3mm thick or to 1.6mm thick Zinc Anneal sheet.

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:


https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(1).JPG

https://dl.dropboxusercontent.com/u/92240200/Tapping%20Screw%20(2).JPG


Thanks.

They are called thread forming screws.

On jobsites, I've just heard them called tappets.

Must be one of those regional things...never heard that term used for
anything other than engines
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.
Note - I qualified my statement with the brand - PK Tappits is a
registered trademark.