Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P87-R88B found under Drive And Feedback by Mpc Products Corporation. The National Stock Number assigned to this part is 1680012783487, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like P87-R88B.