Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S4002-250 found under Gage Setinspection by Starrett L S The Co Starrett Granite. The National Stock Number assigned to this part is 5280016899129, and the Federal Supply Class is 5280 Sets Kits And Outfits Of Measuring Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S4002-250.