Where can I buy 5/16-18 speaker stand spikes?

http://cls.audiogon.com/cgi-bin/cls.pl?accstwek&1139778453

Sorry about the post I thought they were 5/16 you could buy some 1/4" that have a female thread and drill and tap to 5/16"

[url]http://www.partsexpress.com/webpage.cfm?webpage_id=3&SO=2&DID=7&CATID=29&ObjectGroup_ID=139[/url]

Audiopoints has them in wide and narrow bodies.
http://www.audiopoints.com/THREADED.HTML

You could do what I did when one of my spikes was missing. Went to Lowes and bought a hex head bolt with same thread and ground the hex end down to a spike. Works perfect, cost 33 cents and five minutes. Good luck.

www.oregondv.com