Aerospace. Bolts, with MJ threads, made of heat-resistant nickel-based alloy, strength class 1 550 MPa. Procurement specification|Acceptance (approval), Mechanical properties of materials, Threads, Hot-working, MJ threads, Tolerances (measurement), Strength of materials, Passivation, Bolts, Dimensional tolerances, Heat treatment, Statistical quality control, Labelling (process), Defects, Fillets (shape), Tensile strength, Contaminants, Hardness, Surface properties, Acceptance inspection, Temperature, Quality assurance systems, Corrosion, Packaging, Quality assurance, Certificates of conformity, External-thread fasteners, Tensile testing, Production processes, Shear strength, Nickel alloys, Aircraft components, Sampling methods, Torque, Heat-resistant materials