Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6183-4 found under Switch Pressure by Air Dry Co Of America Llc. The National Stock Number assigned to this part is 5930004895048, 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 6183-4.