Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40320 found under Grinding Machine Belt Horizontal by Dynabrade Inc. The National Stock Number assigned to this part is 3419015023640, and the Federal Supply Class is 3419 Miscellaneous Machine Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 40320.