RE: Nylock nut grade?

["Hugh Barber" <tr6nut@sbcglobal.net>]

 Ron,

Here is a web page that lists SAE/ISO grades for bolts and nuts.  As you
will see, there are different designations for similar strength bolts and
nuts http://www.americanfastener.com/technical/grade_markings_steel.asp . 
When replacing nylocks on my Triumph, I follow two rules:
(1) Don't trust any nylock nuts that the local hardware store offers.
(2) Use AN or MS graded nylon locking nuts for all critical applications.

Hope this helps,

Hugh Barber
Hollister, CA
'73 TR6