Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B17304-1 found under Screw Ball by Beaver Precision Products Inc. The National Stock Number assigned to this part is 5305012071307, 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 B17304-1.