Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28D1388-15 found under Screw by Allen Tool Phoenix Inc. The National Stock Number assigned to this part is 5305001810791, 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 28D1388-15.