Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MT4304AALR27A found under Mounting Base Elect by Joint Electronics Type Designation. The National Stock Number assigned to this part is 5975001602242, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MT4304AALR27A.