Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number H87-6 found under by Niagara Electrical Instrument Co. The National Stock Number assigned to this part is 5310000110730, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like H87-6.