Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99527-1 found under Nut Plain Knurled by Piasecki Aircraft Corp. The National Stock Number assigned to this part is 5310004745240, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 99527-1.