Self threading bolts

Rob_AD

Member
I am looking for self threading / self tapping bolts around M8 - M10 in size. I have seen them before but I can’t find any for sale. We got a roller door installed and the fitters had a bunch of them for bolting the runners into the RSJ’s on our shed.

The type I have seen look like a normal M10 bolt but the shank is slightly triangular rather than round. The idea being you drill a pilot hole and then screw the bolt into the hole, and it cuts a thread into the hole.

Anyway, if someone could point me to a website or give me the correct name of these I would be much obliged. Local engineering supplier has never heard of them either.
 

ACEngineering

Member
Location
Oxon
I am looking for self threading / self tapping bolts around M8 - M10 in size. I have seen them before but I can’t find any for sale. We got a roller door installed and the fitters had a bunch of them for bolting the runners into the RSJ’s on our shed.

The type I have seen look like a normal M10 bolt but the shank is slightly triangular rather than round. The idea being you drill a pilot hole and then screw the bolt into the hole, and it cuts a thread into the hole.

Anyway, if someone could point me to a website or give me the correct name of these I would be much obliged. Local engineering supplier has never heard of them either.
Google thread forming screws and bolts. I think that's what your looking for.
 

Badshot

Member
Location
Kent
I am looking for self threading / self tapping bolts around M8 - M10 in size. I have seen them before but I can’t find any for sale. We got a roller door installed and the fitters had a bunch of them for bolting the runners into the RSJ’s on our shed.

The type I have seen look like a normal M10 bolt but the shank is slightly triangular rather than round. The idea being you drill a pilot hole and then screw the bolt into the hole, and it cuts a thread into the hole.

Anyway, if someone could point me to a website or give me the correct name of these I would be much obliged. Local engineering supplier has never heard of them either.

Screenshot_20190722-094209.png

That sort of thing?
 

Rob_AD

Member
Ankabolts ? Thunderscrews ?
Those are concrete fixings

Google thread forming screws and bolts. I think that's what your looking for.
Yes that's bringing up a few more useful results... Taptite seems to be the name of what I'm after

Tek-screws should do that.
Haven't seen Tek Screws in M8 or M10 before

Perfect that's just them, never heard of Taptite before cheers!!
 

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