I worked at a CAT dealer in a former life... things would happen like the warehouse drones would open a cylinder seal kit and take one seal out to ship (said quantity one, didn't want to send the whole bag). Same deal with pan gaskets, some engines they're a jigsaw puzzle, you pull all the pieces apart and lock all the ends together, along with I suppose judicious quantities of yellow peril (gorilla snot), anyway, each piece has the part number laser printed on, so they would detach usually one corner and ship that as a pan gasket. Oh and never forget that CAT hydraulic hose is measured by the inch until oh yeah wait, the really high pressure stuff is by the centimeter so when the hoser built your assembly by part number it came out just a hair off.... One warm evening I was last man out, had the door to the warehouse open relaxing until I could lock the front door, heard one kid that had been with us all of two weeks training one of the summer help college kids how to pull parts and ship orders.... gawd help us....