Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number QQ-N-281 found under Screw Cap Socket He by Federal Specifications. The National Stock Number assigned to this part is 5305014233230, 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 QQ-N-281.