Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MIL-A-21380 TY1GRC found under Grain Abrasive by General Services Administration Inc. The National Stock Number assigned to this part is 5350001845824, 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 MIL-A-21380 TY1GRC.