Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2PYX-8 found under Lens Helmet Welders by Sellstrom Manufacturing Co. The National Stock Number assigned to this part is 4240002768939, and the Federal Supply Class is 4240 Safety And Rescue Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2PYX-8.