Lock Nuts
Flange nuts are engineered fasteners that incorporate a widened, washer-like base directly into the nut's geometry to distribute high clamping forces over an expanded surface area. This integrated flange prevents the crushing or marring of softer mating materials and can feature a serrated underside for enhanced prevailing torque and anti-vibration properties. These fasteners significantly streamline assembly processes and are ubiquitous in automotive transmission mounting, heavy construction machinery, and industrial equipment where joint stability and load distribution are paramount.
Flange nuts are highly specialized, engineered fasteners featuring an integrated, widened, washer-like base directly incorporated into the nut's geometry. This design eliminates the need for separate washers and serves to distribute high clamping forces over an expanded surface area. This built-in flange prevents the crushing, marring, or yielding of softer mating materials, making them ideal for applications requiring exceptional joint stability. They are available with both non-serrated (plain) and serrated undersides; the serrated variants offer enhanced prevailing torque and formidable anti-vibration properties, essentially acting as spin-lock nuts.
To withstand varied environmental stresses, flange nuts are manufactured from high-strength Carbon Steel and corrosion-resistant Stainless Steel (including A2 and A4 grades). The availability of diverse finishes ensures longevity in harsh conditions. These surface treatments include:
Flange nuts are strictly controlled by international standards to guarantee consistency in dimensional and mechanical properties. Key manufacturing standards include:
They are available across various thread types, including Metric Coarse, Metric Fine, Unified National Coarse (UNC), Unified National Fine (UNF), BSW, and BSF. Carbon steel variants are available in standard property classes such as 8, 10, and 12, dictating strict thresholds for Proof Load, Hardness, and Tensile Strength.
The integrated washer geometry of flange nuts streamlines the assembly process by reducing part counts and simplifying handling. Their anti-vibration capabilities and load distribution make them ubiquitous in:
Flange nuts represent a critical advancement in fastening technology, combining the function of a nut and a washer into a single, high-performance component. Whether utilizing serrated flanges for vibration resistance or smooth flanges for protecting mating surfaces, these fasteners deliver unparalleled reliability in high-stress industrial applications.
Our flange nuts are available in a range of sizes, materials, and standards. Contact us for a detailed specifications sheet and competitive bulk pricing.
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