Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 18304B ITEM 18 found under Ball Bearing by Tyco Valves And Controls Lp. The National Stock Number assigned to this part is 3110006827416, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 18304B ITEM 18.