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: