The 7/16-14 inserts come in lengths of one times the diameter, 1185-7CN438, which in my opinion is not long enough for
90Lb/Ft. They also come 1-1/2 X diameter, 1185-7CN656, and 2 X the diameter, 1185-7CN875. I would use the longest
insert if the hole is deep enough, and yes, I would borrow or...