Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FP2231 found under Lockspring Turnlock Fastener by Critical Solutions International In. The National Stock Number assigned to this part is 5325015724444, 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 FP2231.