)Its a 1.5" Tri-clamp to 1" NSP (straight pipe thread) adapter . 1" NSP is the thread on electric elements, so you can probably see where I'm going with this. Certainly not necessary, as a 1" SS Lock Nut from Mcmaster got the job done for me... but if you're doing/having work done on your keg and want to throw one of these in the mix to make your element quickly and easily detachable/changeable its an interesting choice. Also, it could be very useful for adapting the ports on your keg for different purposes. At $15 I think its perhaps not 'cheap,' but definitely reasonable for such a custom application.
- 1-in-NSP-Adapters-3-150x150.jpg (3.64 KiB) Viewed 2615 times
http://conical-fermenter.com/products/spares/" onclick="window.open(this.href);return false;" rel="nofollow
I've also found their other products, esp. triclamp related, to be very reasonably priced.
Enjoy!
Actually, I'd be fine with plastic for wash and/or primary brewing in general... but since I want to use the conical for long-term beer/wine brewing I went stainless. 
