On Jan 4, 10:05*am, "Stuart & Kathryn Fields" wrote:
The MS are of the grade 5 variety, coarse thread and the only thing special
is the drilled head. *$20 each is excessive.

How about you buy a full box of Grade 8 bolts, test half or quarter of
them to destruction in shear and tension, and then reject the box if
any fail below expected values. If they pass, test the rest to the
implementation design limits and then drill the heads on your drill
press using a carbide bit. That might work.

Bob K.