Fro the record, here's the info on the bolts for Yamaha and Kawai. I'll add more as I move other pianos with bolts.
Yamaha
Legs, front: 12 mm x 1.5 x 70 mm; rear: Lag bolt, 12.5 mm shank 105 mm long (1/2" x 4" will work)
Lyre: 10 mm x 1.5 x 45 mm
Kawai
Legs: 12 mm x 1.75 x 70 mm
Lyre: 12 mm x 1.75 x 85 mm (or counter bore 15 mm for a 70 mm to fit)
-------------------------------------------
Regards,
Jon Page