Carbon Steel Round Nut For Construction And Steel Structure Fixing

Product Description:

Round Nuts: Precision Locking Solutions for Demanding Applications

Round nuts are specialized fasteners engineered with a cylindrical outer profile and internal threads, designed to deliver superior locking performance in high-vibration or dynamic-load environments. Unlike standard hex nuts, their circular shape allows installation in confined spaces and enables tool engagement from multiple angles.

Key Features & Advantages:

• 360° Tool Access: External grooves/spanner flats accommodate hook wrenches, pins, or C-spanners for secure tightening in restricted areas.

• Vibration Resistance: Locking variants (e.g., nylon inserts, flange designs) prevent self-loosening under shock loads (compliant with DIN 981, ASME B18.13).

• Material Versatility: Available in carbon steel (Grade 8.8/10.9), stainless steel (A2/A4), and brass, with optional zinc plating or dacromet coating for corrosion protection.

• High Load Distribution: Full-body design minimizes stress concentration, enhancing joint integrity in pulleys, bearings, and rotating shafts.

Typical Applications:

▶️ Bearing retention in industrial machinery
▶️ Adjusting mechanisms on valves and actuators
▶️ Securing components in automotive transmissions
▶️ Mounting fixtures for robotics and aerospace assemblies

Custom Options:

• Sizes: M3 to M100 (metric) / #4 to 4" (imperial)

• Locking Types: Nylon insert, all-metal lock, serrated flange

• Surface Treatments: Passivation, hot-dip galvanizing, Xylan® coating

Key Features:

1. Precision-Engineered Profile

• Circular Body: Optimized for confined spaces (e.g., bearing housings, valve stems) where hexagonal tools cannot rotate.

• Surface Variants:

  • Smooth Finish: For low-friction rotation in precision instruments.

  • Knurled Grip: Diamond or straight knurls (0.3–0.8mm pitch) enhance manual installation/removal in maintenance-intensive systems (ASME B94.6).

2. Advanced Material Science

3. Thread Compatibility

• Metric Threads: Fine (M4x0.5 – M100x4) or coarse pitch per ISO 898-2.

• Inch Threads: Unified UNC/UNF (e.g., #4-40 to 4"-16) compliant with ASME B1.1.

• Special Threads: ACME, trapezoidal, or self-locking deformable threads (DIN 980).

4. Surface Engineering

5. Dimensional Flexibility

• Standard Sizes: M4 to M100 (metric) / #4 to 4" (imperial).

• Customization:

  • Non-standard diameters/tapers (e.g., flanged designs for PCB mounting)

  • Integrated locking features: Nylon inserts (Locking Torque ≥60% of tightening torque per DIN 985)

Performance Validation

Tested to:

• Vibration Resistance: DIN 65151 (10 million cycles @ 50Hz)

• Torque-to-Yield: Exceeds ISO 898-1 requirements by 15%

• Corrosion: ASTM B117 (1,000h neutral salt spray)

Industries Served:

SHANGHAI HUIYI INTERNATIONAL CO., LTD is a trading company dealing with all kinds of steel products and construction materials. 

We build long-term relationships with many factories in China since our team has dealt with trading business for many years. Our main products are Galvanized Steel, Galvalume Steel, Pre-painted Galvanized Steel, pre-painted galvalume steel, corrugated steel, cold roll steel, hot roll steel, angle bar, c channel, aluminum bubble foil, fiber cement....

Our products are mainly exported to Africa, Southeast Asia, the Middle East, Europe, which are used in projects and the construction field.

We have been continuing to supply superior products, services and solutions to customers based on our competitive advantages in brand, technology, innovation and ability.

SHANGHAI HUIYI INTERNATIONAL CO., LTD has got huge support and help from our customers and suppliers. We have been growing up at a rapid and steadily pace. We will do our best to give our customers a better price, better quality and better service.