Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 021.450544 found under Screw Machine by Aim Infrarot Module Gmbh. The National Stock Number assigned to this part is 5305007278833, 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 021.450544.