Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 595-6401439 ITEM 1 found under Bearing Sleeve by Kamatics Corporation. The National Stock Number assigned to this part is 3120013984309, 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 595-6401439 ITEM 1.