Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MP2-4U87A found under Limiter Discriminator Training S by Rhg Electronics Laboratory Inc. The National Stock Number assigned to this part is 6940003134747, 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 MP2-4U87A.