I checked out Fedhills website. The tech page has a lot of info on nuts and fittings.
http://www.fedhillusa.com/?page=tech2


Joe
--------------------------
'67 Chevy C20 fleetside, 250 inline, 3 on tree, heavy duty clutch and brakes, heater, steel bed floor
-----------
"Tighten until the stud snaps, then back off half a turn."