Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS1580A3T14X found under Screw Close Toleran by National Aerospace Standards. The National Stock Number assigned to this part is 5305016013566, 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 NAS1580A3T14X.