Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS17990C1027 found under Pin Quick Release by National Aerospace Standards. The National Stock Number assigned to this part is 5315009221718, 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 MS17990C1027.