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High-Strength Hex Nut GOST 22354-77
Technical Characteristics of GOST 22354-77
The high-strength hex nut according to GOST 22354-77 is a metal fastener used to create strong and durable connections in structures subjected to significant loads.
Main characteristics:
- Shape: hexagonal
- Thread type: metric
- Nominal diameter: from M12 to M48
- Material: high-strength steel
- Coating: zinc plating, phosphating, or without coating
- Strength class: 8, 10, 12
GOST 22354-77 regulates the exact dimensions of nuts, their mechanical properties, as well as the requirements for materials and manufacturing technology. Due to their high strength, these nuts are used in structures experiencing dynamic and static loads.
Strength Class of High-Strength Hex Nut GOST 22354-77
The strength class of the nut according to GOST 22354-77 determines its ability to withstand loads without deformation or failure. The most common strength classes include:
- Class 8 – used for medium loads.
- Class 10 – suitable for more critical connections.
- Class 12 – applied in structures with high loads, such as in mechanical engineering and bridge construction.
The choice of strength class depends on operating conditions, allowable load, and connection requirements.
Fastener Group GOST 22354-77
Nuts according to GOST 22354-77 belong to high-strength fasteners used in connections with bolts and studs of the corresponding strength class. They are part of the following groups:
- High-strength nuts for critical connections.
- Fasteners used in conditions of increased mechanical and temperature loads.
- Elements used together with high-strength bolts of the corresponding standard (e.g., GOST 7798-70).
Due to their characteristics, GOST 22354-77 nuts are widely used in metal structures, bridges, construction projects, transportation engineering, and other areas where reliable threaded connections are required.
Manufacturing Materials of High-Strength Hex Nut GOST 22354-77
The following materials are used for manufacturing GOST 22354-77 nuts:
- Steel 35, 40, 45 – used for strength class 8 nuts.
- Steel 30KhGSA, 40Kh, 40KhNMA – used for strength class 10 and 12 nuts.
- Stainless steel (A2, A4) – for operation in aggressive environments.
- Brass, bronze – rarely used for specific operating conditions.
Depending on the operating conditions, nuts may have the following coatings:
- Zinc coating – for corrosion protection.
- Phosphated coating – increases wear resistance and improves anti-corrosion properties.
- Without coating – used in conditions where corrosion is not a critical factor.
The choice of material depends on the load, operating conditions, and required resistance to external influences.
Application of GOST 22354-77
The high-strength hex nut GOST 22354-77 is a critical fastener used in high-strength threaded connections. It provides reliable fastening in critical structures and mechanisms.
The main purpose of the nut is to create a strong and durable connection in combination with appropriate bolts or studs. It prevents self-loosening and ensures high resistance to dynamic and static loads.
Main applications:
- Construction – used in metal structures, bridge supports, and building frameworks.
- Mechanical engineering – applied in the production of heavy equipment, automobiles, and railway transport.
- Energy sector – used for mounting metal supports, power lines, and turbines.
- Oil and gas industry – ensures reliable fastening under high loads and aggressive environments.
- Machine tool manufacturing – used in assemblies requiring strong and durable connections.
Material selection for different operating conditions:
- Zinc-coated steel – recommended for structures operating in humid conditions or with moderate exposure to aggressive environments.
- Stainless steel (A2, A4) – provides corrosion resistance, used in aggressive environments and at large temperature fluctuations.
- Uncoated steel – suitable for dry operating conditions where corrosion is not a concern.
For installation and removal of GOST 22354-77 nuts, standard wrenches or power tools are used. If additional fixation is needed, lock nuts or special fixing compounds can be applied.
Due to its technical characteristics and versatility, the high-strength hex nut according to GOST 22354-77 is a crucial component in many industrial and construction fields.
