An excerpt from my book:
"Because pinballs are usually American made machines, fuses used in DMD pinballs are 1¼ x ¼ inches or about 6.3mm x 31.75mm - in most other countries the industry standard 3AG types measure 6mm x 30mm and this is very likely what you will be able to buy locally.
Keep this slight size difference in mind when replacing fuses as the clips that hold the fuse may need to be bent in slightly to accommodate the marginally smaller diameter part."
