The star lockwashers with the locking fingers pointing inward do a better job of sealing oil seeps than the ones with external tabs. They're available on Ebay at very reasonable prices. You'll want to search for "7/16" diameter star lockwashers".

For instance:
www.ebay.com/itm/265701064242?

Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!