Parker Hannifin Corp., Irvine, California, has been awarded a maximum $1,750,000,000 requirements contract for aircraft spare parts. This was a sole-source acquisition using justification 10 U.S. Code 2304 (c)(1), as stated in Federal Acquisition Regulation 6.302-1. This is a five-year base contract with one five-year option period. Locations of performance are California, Florida, Michigan, Massachusetts, Georgia, Ohio and South Carolina, with a March 31, 2026, performance completion date. Using military services are Army, Navy, Air Force and Marine Corps. Type of appropriation is fiscal 2021 through 2026 defense working capital funds. The contracting activity is the Defense Logistics Agency Aviation, Richmond, Virginia (SPE4AX-21-D-9401).