Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3929AS1227-3R5 found under Screw Close Tolerance by Raytheon Technical Services Company. The National Stock Number assigned to this part is 5305011789308, 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 3929AS1227-3R5.