Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4403TL-L found under Switch Rotary by Entech Inc. The National Stock Number assigned to this part is 5930002964420, 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 4403TL-L.