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China Semi Finished Square Nuts Manufacturer, Supplier, Factory

When it comes to reliable fastening solutions for heavy-duty and industrial applications, the square nut remains a cornerstone component. Its unique shape provides superior resistance to loosening under vibration and torque, making it indispensable in construction, machinery, and rail systems. For applications demanding extra strength and durability, such as securing rails and tracks, the Thick square nut for track is specifically engineered. Its increased height and mass offer a larger bearing surface and greater thread engagement, ensuring a secure and long-lasting hold in the most demanding environments. Similarly, our standard Thick Square Nut provides enhanced performance for general heavy machinery and structural projects where standard nuts might fail. These components are designed to meet rigorous industry standards, providing engineers and builders with the confidence that their assemblies will remain intact and secure over time.


Semi Finished Square Nuts are manufactured to precise specifications, offering a versatile and cost-effective solution for various industrial applications. They are supplied in a semi-finished state, allowing for final machining or plating to meet specific project requirements. This flexibility makes them ideal for custom applications and large-scale production runs. Below are the detailed technical specifications for our standard range of Semi Finished Square Nuts.

Key Specifications

  • Material: Carbon Steel, Stainless Steel, Alloy Steel
  • Standards: ASTM, ANSI, DIN, ISO
  • Finish: Semi Finished (Black/Oil Finish), can be Zinc Plated or Hot-Dip Galvanized upon request
  • Thread Type: Metric (M) and Imperial (UNC/UNF)
  • Temperature Range: -50°C to +300°C (depending on material grade)
  • Corrosion Resistance: Varies with material and optional plating

Detailed Product Dimensions

Size (Across Flats) Thread Size Thickness (Standard) Thickness (Thick) Approx. Weight per 1000 pcs (kg)
5/16" 1/4"-20 UNC 0.236" (6.0mm) 0.315" (8.0mm) 1.5
1/2" 3/8"-16 UNC 0.354" (9.0mm) 0.472" (12.0mm) 5.8
3/4" 1/2"-13 UNC 0.472" (12.0mm) 0.630" (16.0mm) 15.2
M8 M8 x 1.25 6.0mm 8.0mm 2.1
M12 M12 x 1.75 10.0mm 14.0mm 9.5

Please note that these dimensions are for standard products. Custom sizes and specifications are available upon request. All our Semi Finished Square Nuts undergo rigorous quality control checks to ensure dimensional accuracy and material integrity.

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