Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 76553-78X16 PIECE 19 found under Pad Bearing by Electric Boat Corporation. The National Stock Number assigned to this part is 3120012137756, 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 76553-78X16 PIECE 19.