Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number THREAD TENSION NO 17 found under Plate Throat Sewing Machine by Chandler Industries Inc. The National Stock Number assigned to this part is 3530016555073, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like THREAD TENSION NO 17.