All of the AN series bolts I see have regular hex heads. What Mil spec
are you referring to that has a 12-point head on a bolt? There are 2
kinds of high strength AN nuts. The "Jet Nuts" are 6 point, with a
small head and a flange. The 12 point ones are called "Super Nuts" in
the catalogs I have. Both are intended for areas of limited access.
The manifold nuts on my Formula Junior are barely reachable even with
12-point nuts. ARP bolts with special heads aren't necessarily Mil-spec
AN series, even though they may exceed some of those standards.
Derek Harling wrote:
>
> Derek Harling wrote:
> > >
> > > Seriously many hi-ten bolts have 12 points - MIL spec etc - the only
> > > ones you can trust these days.
> >
> > are you talking about spline nuts, or 12-point nuts?
>
> No - BOLTS - you know - those eunuch things - the ones without nuts.
> Derek
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