Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 90594-01 found under Visor Cathode Ray T by Jonal Laboratories Incorporated. The National Stock Number assigned to this part is 5960011000089, and the Federal Supply Class is 5960 Electron Tubes And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 90594-01.