Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7530-00-223-7939 found under Notebook Stenograph by National Industries For The Blind. The National Stock Number assigned to this part is 7530002237939, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 7530-00-223-7939.