Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HR30158-20 found under Washer Thrust Rotar by Pacific Scientific Company. The National Stock Number assigned to this part is 3120008900710, 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 HR30158-20.