Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 539402 found under Bushing Sleeve by Level 10 Industries Inc. The National Stock Number assigned to this part is 3120013946005, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 539402.