02-17-2015, 07:55 PM
On the 70s Ampeg amplifiers the screws were generally #8 by 1-1/4 inch clutch head screws. These are standard screw threads not fine thread machine screws. These vintage screws are nearly impossible to find but occasionally you can find these on eBay for about three dollars a piece. A close approximation would be torx head screws that you can buy from fastener supply houses. Phillips head versions are available at Lowe's or Home Depot.