Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 449-0193 found under Chrome Nut Gas Cup by M K Products Inc. The National Stock Number assigned to this part is 3431015031217, and the Federal Supply Class is 3431 Electric Arc Welding Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 449-0193.