What are fasteners with telescoping thread called?

[Noyade]

Hello Bunnings.

What are the fasteners called - with the telescoping thread?

Allen key ends?

I'm looking to join two 18mm pieces of wood together.

Cheers and thanks.

[MitchellMc]

I always forget that one @Noyade. It's a connector bolt and connector cap. 

Please let me know if you have any questions.

Mitchell

[Noyade]

Thanks @MitchellMc 

I've started a notebook with all the hardware names now.

Cheers.