Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 105Z61 found under Cup Welding Torch by Weldcraft Customer Service. The National Stock Number assigned to this part is 3431002266992, 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 105Z61.