Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 90-8100-48401 found under Setscrew by Cincinnati Gear Co The. The National Stock Number assigned to this part is 5305013442054, 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 90-8100-48401.