Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 15-840 found under Drill Chuck Attachm by Delta International Inc. The National Stock Number assigned to this part is 3230010538638, 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 15-840.