Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1 2 13UNC 2AX2 TYI GR304 found under Screw Cap Hexagon Head by American National Standards Inst. The National Stock Number assigned to this part is 5305007017628, 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 1 2 13UNC 2AX2 TYI GR304.