Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number Z12-1-H found under Screw Cap Hexagon H by W M Berg Inc. The National Stock Number assigned to this part is 5305016001244, 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 Z12-1-H.