Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BF3891-1 found under Nozzle Assembly Torch by Sciaky Inc. The National Stock Number assigned to this part is 3431000855526, 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 BF3891-1.