Large spikes required...

... like the ones used on PMC speaker stands, ie a long threaded black bolt that comes with two lock nuts - nothing fancy. But the threaded shaft must be LONG, enabling the bolt to protrude through a 20mm thick sheet. I don't want the type which is self tapping with a t-nut. The bolt must pass through the thick sheet, NOT screw into it.

If I can't find what I want then I'll just get a regular long bolt sharpened at the end...

Thanks!

ps

The gold ones will work as they have a +30mm thread, but look to ponsey:

http://www.supercellaudio.com/Pages/Floor Spikes.htm

I want a more industrial look, like these but longer:

http://www.thecablepro.com/accessory_images/1420_spike.jpg

 

That is about all the commercial ones are !

my local fastener place does threaded rod to almost any length with the appropriate nuts washes etc ....if you need a contact let me know.

 

I've sourced some from HK now, thanks!