Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12801 4277 found under Screw Tapping by Atlantic Inertial Systems Inc. The National Stock Number assigned to this part is 5305996115479, 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 12801 4277.