Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S2431221-16C22H found under Shim by Moeller Manufacturing And Supply Inc. The National Stock Number assigned to this part is 5365014188624, and the Federal Supply Class is 5365 Bushings Rings Shims And Spacers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S2431221-16C22H.