Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RMK253A found under Rack Electrical Equipment by R And D Services. The National Stock Number assigned to this part is 5975015875585, 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 RMK253A.