Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 157-52 found under Blade Circular Saw Woodcutting by Kett Tool Company Inc. The National Stock Number assigned to this part is 3230011598870, and the Federal Supply Class is 3230 Tools Attachments For Woodwork Machinery. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 157-52.