Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4199 found under Visor Faceshield Industrial by National Torch Tip Co Inc. The National Stock Number assigned to this part is 4240003132204, 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 4199.