Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BACB30LU8-21 found under Screw Close Toleran by Federal Industries Inc. The National Stock Number assigned to this part is 5305012077549, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BACB30LU8-21.