Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WS9039-4003 found under Lead Electrical by Ultra Electronics Precision Air. The National Stock Number assigned to this part is 6150997390938, and the Federal Supply Class is 6150 Miscellaneous Electric Power And Distribution Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WS9039-4003.