Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PS1211 40 found under Screw Cap Hexagon Head by Emerson Electric Co. The National Stock Number assigned to this part is 5305013500580, 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 PS1211 40.