Question for the engineers - screw within another screw head

[toffe wrapper]

Try a rivet nut. works like a pop rivet but has a threaded hole through it.


Blind Rivet Nuts

The Blind Rivet Nut or Grip-Sert, as it was originally known, forms part of the TR Fastenings sheet metal product range. Since early 2015 we have increased our range considerably and now have more stock and variations available than ever before.

This product is designed to offer a permanent female thread in sheet metal that already has a drilled or punched hole. The Blind Rivet Nut then secures itself by collapsing the body to create a secure fit on both sides of the host material.

[kennyc]

Is this for a carpentry application?

No - the big screw - self tapping into light plastic. The small screw - attaching very light metal item to big screw.

this any good ? https://www.tappex.co.uk/

[Dellboy]

https://www.fastenright.com/general-fix ... stics/in07

check these out

[Yalan]

Lots of good suggestions above....

I found these 'push in with a soldering iron' threaded inserts for 3d printed parts and thought 'thats a good idea'!.....

https://www.ebay.co.uk/itm/M4-x-10pcs-T ... Sw9N1VrPxc

But all derends on application.... I do like 1/4 turn Dzus fittings if materials and design allow.

[Egg on Leggs1]

http://www.stanleyengineeredfastening.c ... ed-inserts

[glevum]

I have used these in PVC extensively. They work well, but are not cheap

http://www.specialty-fasteners.co.uk/pr ... ad-locking

The locking keys stop it unscrewing

[breacher]

Thanks guys - loads of great sources there.

[Furiouspilgrim]

I think you possibly mean helicoil

https://www.amazon.co.uk/s/?ie=UTF8&key ... kwuigim8_e

Alan

No helicoils are for the repair of b*ggered screw threads.

Arse-savers as we call them

[Dellboy]

I think you possibly mean helicoil

https://www.amazon.co.uk/s/?ie=UTF8&key ... kwuigim8_e

Alan

No helicoils are for the repair of b*ggered screw threads.

or a way of putting a steel thread in an alloy component .....