Type This document covers metric bolts and screws made from a corrosion and heat resistant@ age hardenable iron base alloy of the type identified under the Unified Numbering System as UNS S66286. The following specification designations and their properties are covered: MA3374 900 MPa minimum ultimate tensile strength at room temperature 480 MPa stress-rupture strength at 650 ??MA3374-1 900 MPa minimum ultimate tensile strength at room temperature 590 MPa minimum ultimate shear strength at room temperature Application Primarily for aerospace propulsion system applications where a combination of fatigue strength@ tensile strength@ stress rupture strength and resistance to relaxation at elevated temperatures is required. Safety - Hazardous Materials While the materials@ methods@ applications@ and processes described or referenced in this specification may involve the use of hazardous materials@ this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.