Re: bolt/screw specifications

Posted by Owen_Dyneto On 2013/10/8 12:57:33

Mark, I'm inclined to very often reuse the original fasteners when they are in a highly visible location and in good shape, in part just to preserve the head stamp markings. That said, there are some places that I routinely use stainless, either alone or sometimes with brass nuts; these include exhaust manifolds and header pipes, water jacket side plates (prewar Senior 8s), water pump bolts that go thru into the water jacket, and other similar places that are subject to possible corrosion.

There aren't all that many places of a Packard that require high strength (grade 8) fasteners and these can usually be easily identified by either the torque spec or by the head markings. Where required I'd rather use a good steel grade 8 bolt any day than a stainless one. Stainless is not the "perfect" metal, as pointed out previously it's propensity to galling is a shortcoming.

I fully agree with jwogec about Tioga Stainless, I've bought from them often over the years with complete satisfaction.