Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S4JR25-3A found under Switch Rotary by Couch S H Co. The National Stock Number assigned to this part is 5930005784903, 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 S4JR25-3A.