Needle Set Screws #4554 (#004554) for Pegasus,
Up for sale is High Quality (Super Alloy Steel) Allen Hexagon Needle Set Screws #4554 (#004554) - sold in pack of 10, 100 and 500 pcs.
Fits Pegasus EX5100, W500, W600, W200, etc.
For allen wrench screwdriver #474 (#000474) - you may order here: https://www.ebay.com.au/itm/173767678207