Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1504 found under Screw Cap Hexagon Head by Dp Mfg Inc. The National Stock Number assigned to this part is 5305015135896, 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 1504.