@marlinjack posted:...You guys amaze Me how you over-think and complicate a simple matter.
DO This! The Stud Can ONLY Leak Around the Threads, inside of the clearance to the Plate!! First install a 'Thin' O-Ring (NOT Too Thin) over the Stud, Just slightly smaller than the stud and Snug it down to 'Bottom' it. Then Install a 'Common' Washer, NO Rubber on it...SS would be nice Or a 'Grade-8', Then...Torque-On the Acorn/O-ring, Nut! The Thin O-Ring WILL Crush-in between the threads and the Plate, if good quality, NO Seeping!! I've done this more times than I have fingers and toes. The Fact Is with the First O-Ring sealing the Stud...you don't even need a Second O-Ring on the Nut!! Think about THAT for One Minute! Sorry Husker.
...and I'll stake My reputation here...NEVER go Without a Washer!! Under EVERY Bolt-Head and Nut, Always Use a Washer! Or You'll Learn the Reasons Why!!
MJ
Tried. Failed.