Technical Specification: Connecting Rod Bolt (Part No. 7N-2405)1. Product Identification
- Part Number: 7N-2405 / 7N2405
- Component Type: Connecting Rod Bolt / Conrod Bolt
- Compatible Equipment Brand: Caterpillar (Cat)
2. Dimensional & Thread Specifications
- Thread Diameter: 9/16 in
- Thread Pitch: 18 TPI (UNF - Fine Thread)
- Underhead Length: 4.14 in (approx. 105 mm)
- Overall Length: 4.88 in (approx. 124 mm)
- Drive Style: 12-Point Counterbore (Spline Head)
3. Material & Mechanical Properties
- Material Grade: High-Tensile Alloy Steel (equivalent to Cat High-Strength Hardware specifications)
- Coating/Finish: Phosphate coated or black oxide oiled for corrosion resistance and consistent torque coefficient.
- Manufacturing Process: Cold-forged with rolled threads for enhanced fatigue resistance under high cyclical loading.
4. Primary Applications
- Engine Families: Caterpillar 3500, 3508, 3512, 3516, and 3600 Series heavy-duty industrial and marine diesel engines.
- Equipment Types: Large mining trucks, track-type tractors, marine propulsion systems, and prime power generator sets.
