Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 420-8780 found under Parts Kitfastener by Caterpillar Inc. The National Stock Number assigned to this part is 5325016813480, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 420-8780.