25-02-2021, 11:18 AM
My engine mounting bolts happened to be on the side in the kitchen this morning, so I measured them whilst making tea for the boss. All four are the same - 1 3/4" long and either 15/32" x 20tpi or, perhaps more likely, M12 x 1.25. The vernier measured .466" over the slightly tired threads. I assume the cherished suppliers were also out of stock at some earlier point in time when the chassis was being renovated, or is this another example of an unusual Austin original thread?