broken plate bolt

[David Renaud]

Old Knabe grand.

A plate bolt 4 7/8 inch long and 3" in diameter sheered
in two as I was screwing  it down. The bottom two inches
of it is left at the bottom of the hole. I was surprised to see
a bolt so thick snap. Yes , It was giving lots of torque, but
not so much as I would expect it to snap. This is an 80 year
old Knabe grand.

Does anybody make a habit of replacing old plate screws?
Any suggestions on getting it out? Anyone been there?
I must find something that will drill it out and plug it, but
it is very hard steel. Or I must plug the three inches above it
and get a shorter bolt.

                              Thanks
                              Dave Renaud
                              RPT