Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AN500B6-12 found under Screw Machine by Aeronautical Standards Group. The National Stock Number assigned to this part is 5305001511275, 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 AN500B6-12.