Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM55F found under Pad Abrasive Disk Holder by Standard Abrasives Inc. The National Stock Number assigned to this part is 5130013264710, and the Federal Supply Class is 5130 Hand Tools Power Driven. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SM55F.