Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20229 BLK.OXIDE found under Screw Machine by Federal Screw Products Inc. The National Stock Number assigned to this part is 5305009545631, 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 20229 BLK.OXIDE.