Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 04 EPP 015 found under Eyepiece Microscope by Melles Griot Inc. The National Stock Number assigned to this part is 6650010988287, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 04 EPP 015.