Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1159CM20264 11 found under Washer Flat by Gulfstream Aerospace Corp. The National Stock Number assigned to this part is 5310013196091, 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 1159CM20264 11.