Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 709-028-000 found under Switch Gun by Nelson Stud Welding Inc. The National Stock Number assigned to this part is 5930008911032, 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 709-028-000.