The bolts have a longer shoulder that must be machined 1/16" for use on old steel drums. These bolts must be swedged under 30 to 40 tons of pressure & should be done by an expert at a machine shop.
The longer shoulders are designed for the cast-iron drums. 1928, 1929, 1930, 1931
Rear Hub Bolt 1/2 X 20 Threads A1118
£1.15Price