Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 94-158-043 found under Collet Welding Torch by Arcair Co. The National Stock Number assigned to this part is 3431016247524, 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 94-158-043.