[TR] bottom trunnion grease fitting size?

[dorpaul]

The driver's side brass truunion is missing it's bottom grease fitting.  I was
hoping it would be an easy replacement as I had several sizes of fittings in
my shop.  None of them 'caught' any kind of thread or anything, but, a fine
threaded 5/16" bolt seem to come the closest (it didn't really thread either).
Using a 7/16"ths wrench I attempted to unscrew the one on the other front
wheel, but it just kept turning and would not unscrew.
    Hopefully, this is an easy repair and I don't have to replace the entire
truunion just because it's missing a grease fitting!!
    I believe this size fitting is also used above the ball joints.
    Is this repair doable?

Thanks,
Paul Dorsey
60 TR3

--
I am using the free version of SPAMfighter for private users.
It has removed 684 spam emails to date.
Paying users do not have this message in their emails.
Get the free SPAMfighter here: http://www.spamfighter.com/len