Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS1121-6H found under Screw Close Tolerance by Qualified Air Components Inc. The National Stock Number assigned to this part is 5305001440508, 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 NAS1121-6H.