is this a specialty bol

huangyhg

is this a specialty bolt?
i am not having any luck finding a 9/16 clevis bolt with a 3-11/16 grip.  i have looked on the internet and could not find a table showing an an29-?.  all of the suppliers that have tables listing clevis bolts seem to drop off at around 1/2鈥?diameter.  is there a specification that lists all of the an hardware dimensions that can be downloaded for free.  i need this information for a personal aircraft and being that my area of engineering practice has nothing to do with aircrafts, buying a spec to lookup one bolt seems like overkill.  this particular bolt comes from a classic aircraft where there is no longer a manufacturer to provide support.  if this is a standard an bolt, does anyone have a recommendation where to purchase 8 ea of these?
crg (mechanical)
can you use an nas close tolerance bolt instead?
or do you have to have the round head on the bolt?
b.e.
this bolt is available. try
an29-66; new stock
pacific hi-temp hardware
4140 van owen place
burbank,   california   91505
phone: 818-841-0070 fax: 818-842-7029