On 25-Jun-15 8:37 PM, Robert wrote:
"Techman" wrote in message
...

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.
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Did a search for images of self tapping screws. Scrolled through the
images to find one like yours. The image description called them tread
cutting screws.


http://www.fastenersuperstore.com/ca...ampaign=Screws


http://www.grainger.com/category/thr...ecatalog/N-8nc




Robert



cheers Robert, I've found a source.