1/8" NPT will only fit old, old spyders without vertical adapters.... so basically 1% of the existing population of spyders. it can be force-threaded into the more common metric variety with a thread-locking compound without serious risk of failure, but it will permanently ruin the threads in the body.
the more you know!
these are a good deal though, and really useful for a many things, scoop em up!
Last edited by ApoC_101; 11-21-2012 at 12:07 PM.