Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HM04B found under Multiplier Unit by Fleet Readiness Center East Div Department Of Navy. The National Stock Number assigned to this part is 5920008941495, and the Federal Supply Class is 5920 Fuses Arresters Absorbers And Protector. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HM04B.