With a quantity of six pieces, the Cap,soc.bolt 8mm is the most used part in the HANDLE PIPE/TOP BRIDGE diagram.
Some items from this specific schematic: Holder,handle Low, Bolt,socket,7x55, Clip,harness, Pipe Comp.,strg..
Of all the components that make up this Handle Pipe/top Bridge the Washer,plain, 6mm has the lowest price.