Quanzhou Yangxin Machinery Co., Ltd.
Quanzhou Yangxin Machinery Co., Ltd.
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High-Strength M24 Excavator Track Shoe Bolts for Komatsu PC200, PC300 - 10.9 Grade Zinc Plated
Engineered for extreme-impact environments like mining quarries and demolition sites, our
M24x120mm Track Shoe Bolts redefine durability. Forged from **42CrMo alloy steel** and hardened to **Rockwell C38-42**, each bolt undergoes triple-stage heat treatment to achieve ultimate tensile strength of **1,220 MPa** – 30% higher than ISO 898-1 standards. The patented **asymmetric flank thread** (60° load-bearing angle vs standard 30°) eliminates vibrational loosening even under 12G shock loads.
**Proven Performance**:
- 2,000-hour salt spray resistance via **Geomet® 321 zinc-flake coating** (DIN EN ISO 10683)
- Withstands shear forces >285 kN (tested on Komatsu PC8000 in Chilean copper mines)
- Precisely torqued to **980 N·m ±5%** with ultrasonic calibration
**Compatibility**: Direct replacement for Komatsu PC360/PC800, Hitachi EX5600, Caterpillar 349 track systems. Includes NATO stock number **NSN 5306-66-0523**.
Surviving Siberian winters requires bolts that laugh at -60°C. Our **arctic-grade track bolts** leverage **Ni-Cr-Mo alloy** (EN 10269 certified) with Charpy V-notch impact value of **102 J at -65°C** – shattering standard bolts’ 27J limit. The deep-cryogenic treatment at -196°C realigns crystalline structures to prevent brittle fracture.
**Critical Innovations**:
- **Helical locking grooves** mechanically fuse with nuts, creating vibration-proof joints
- **PTFE-impregnated coating** reduces ice adhesion by 89% (per SAE J1401)
- Match Hyundai HL770, Volvo EC950F and Liebherr R 980 track specs
**Field Validation**: 18-month deployment on Alaska’s Trans-Pipeline showed zero failures vs OEM’s 23% breakage rate...
| Brand | Model | Bolt Type | Size | Thread | Grade | OEM Part Example |
| Komatsu | PC200 | Hex Head Bolt | M16x60mm | 2.0mm | 8.8 | 6Y-3201 |
| Komatsu | PC300 | Flange Bolt | M20x80mm | 2.5mm | 10.9 | 789-65-10740 |
| Hyundai | R220 | Hex Cap Screw | 3/4"x3" | 10UNC | Grade 8 | R2225-2S0020 |
| Hyundai | R500 | Shoulder Bolt | M24x120mm | 3.0mm | 12.9 | HX501-2C0050 |
| Komatsu | PC130 | Carriage Bolt | M12x40mm | 1.75mm | 8.8 | 755-11-11310 |
| Hyundai | HX300 | Taper Bolt | 5/8"x2.5" | 11UNC | Grade 5 | HX300-1R0040 |
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