Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B1311-65 found under Rotolock Assembly by Simmons Fastener Corp. The National Stock Number assigned to this part is 5340003564761, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B1311-65.