Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M5X16DIN7991 A2P found under Screw Cap Socket He by Din Deutsches Institut Fuer Norm. The National Stock Number assigned to this part is 5305121730258, 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 M5X16DIN7991 A2P.