Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS561C12-20 found under Pin Spring by Gw Technologies Pty Ltd. The National Stock Number assigned to this part is 5315005141353, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NAS561C12-20.