RAW MATERIAL: 10B21 1035 1045
FINISH: BLACK/ZP/HDG
STANDARD: DIN980
SIZE: M3-M39
GRADE: ISO898-2
Our Metal Lock Nuts are designed for bolted assemblies where reliable resistance to loosening is required, particularly in applications involving vibration, mechanical movement, repeated loading, or elevated service temperatures where conventional nuts or nylon-insert locking nuts may not be the ideal choice. Unlike nylon insert lock nuts, Metal Lock Nuts rely entirely on their metal construction and locking geometry to generate additional resistance against rotational loosening. This all-metal design eliminates the need for a non-metallic locking insert, providing a robust fastening solution for industrial environments where temperature, mechanical stress, or other environmental conditions must be carefully considered.
The absence of a nylon or polymer insert is one of the key advantages of a Metal Lock Nut. Since the locking function is integrated into the metal nut itself, the product does not rely on a plastic locking element to maintain its locking capability. This makes Metal Lock Nuts particularly attractive for applications where heat, mechanical vibration, repeated movement, or demanding operating environments may limit the suitability of polymer-insert locking nuts. For engineers and procurement teams, this provides an alternative locking solution when the fastening system requires an all-metal construction.
Our Metal Lock Nuts are manufactured from 10B21, 1035, and 1045 steel, providing different material options for customers with varying mechanical and production requirements. 10B21 is a commonly used boron-alloy steel in cold heading and fastener manufacturing, while 1035 and 1045 provide practical carbon steel options for mechanical fastening applications. The available mechanical property specification is ISO 898-2, allowing the nut to be selected according to the required strength class and properly matched with the corresponding bolt in the complete fastening assembly.
Our Metal Lock Nuts are manufactured according to DIN 980, a recognized standard associated with prevailing-torque all-metal hexagon lock nuts. The standardized design provides a consistent basis for dimensions and application compatibility, making these nuts suitable for customers working with established European fastening specifications. For procurement teams and distributors, compliance with a recognized standard also simplifies product selection and helps ensure that the locking nut can be integrated into standardized metric fastening systems.
One of the primary reasons to select a Metal Lock Nut is the need to improve the stability of a bolted connection under vibration and dynamic loading. Conventional nuts depend primarily on the clamping force of the joint, while a locking nut introduces additional resistance to rotation. In a properly designed and tightened assembly, this additional prevailing torque helps reduce the tendency of the nut to rotate freely under vibration or repeated mechanical movement. This makes Metal Lock Nuts suitable for machinery, automotive components, industrial equipment, mechanical assemblies, and other applications where maintaining fastening integrity is important.
Metal Lock Nuts are available in Black, Zinc Plated (ZP), and Hot-Dip Galvanized (HDG) finishes to accommodate different service environments. The availability of three finishes gives buyers greater flexibility when specifying the complete fastening system.
A practical option for general industrial applications.
Enhanced corrosion protection for common indoor and moderately corrosive environments.
A more substantial protective zinc coating for outdoor construction, infrastructure, and moisture-exposed applications.
Metric: M3–M39
The size range allows the same product family to serve both compact mechanical assemblies and larger industrial applications, combined with the DIN 980 standard and ISO 898-2 specification.
For general-purpose applications, Nylon Insert Lock Nuts remain an economical anti-loosening solution. However, when the application calls for an all-metal locking construction, Metal Lock Nuts offer a distinct advantage by eliminating the polymer insert. This makes them a useful option when the fastening environment may involve higher temperatures or conditions where a nylon insert is unsuitable. The final choice should always consider the actual operating temperature, vibration level, tightening requirements, corrosion environment, and bolt-nut compatibility of the joint.
With 10B21, 1035, and 1045 steel options, ISO 898-2 mechanical grades, DIN 980 dimensions, M3–M39 sizes, and Black/ZP/HDG finishes, our Metal Lock Nuts provide a versatile sourcing solution for industrial manufacturers, machinery producers, automotive suppliers, distributors, and maintenance applications.
By combining a standardized metric design with an integrated all-metal locking function, they provide buyers with a dependable alternative where vibration resistance, environmental durability, and all-metal construction are more important than simply using a conventional hex nut — a practical balance of locking performance, material flexibility, corrosion protection, and application versatility.
