I am trying to I.D. these IH parts that were stored in a 1950s-1960s tool box that contained mostly refrigerator parts and repair tools. Its likely they are also refrigerator parts; however, this is farm country so they could easily be truck or farm equipment parts. They are about 1 7/16" long and chromed. The two boxes appear to have part numbers which start "410109". Following these numbers are a hyphen and two or three unknown characters (R8, maybe R1, 181, etc.). 410109-R8 is the best guess so far and hasn't turned up on Google yet.