Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28-0-310 found under Minilever by Catty H D Corp. The National Stock Number assigned to this part is 5930010708020, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 28-0-310.