Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 596-021 found under Screw Cap Hexagon H by Zf Industrieantriebe Witten Gmbh. The National Stock Number assigned to this part is 5305121240543, 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 596-021.