Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ANSI B74 18 400GRIT found under Cloth Abrasive by General Services Administration Inc. The National Stock Number assigned to this part is 5350002600750, and the Federal Supply Class is 5350 Abrasive Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ANSI B74 18 400GRIT.