Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS4450S05-03 found under Pin Rivet by National Aerospace Standards. The National Stock Number assigned to this part is 5320010561563, and the Federal Supply Class is 5320 Rivets. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NAS4450S05-03.