Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 17007 found under Cup Welding Torch by Grayco Optical Corp. The National Stock Number assigned to this part is 3439000433148, and the Federal Supply Class is 3439 Miscellaneous Welding Soldering And Brazing Supplies And Accessories. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 17007.