A: Inspect for visible thread stretching, necking, or rust bleeding around the bolt head. Any signs of loosening on the CAT 320D mounting brackets suggest the bolts have reached their fatigue limit.
A: Always refer to the CAT service manual for specific dry vs. lubricated torque specs. Use a calibrated torque wrench to ensure the bolt reaches its designed clamping force without overstressing.
A: Yes, this high-strength hex bolt is versatile and used across various mounting points in CAT 320D and 320DL series, making it a vital stock item for mixed fleet repairs.
A: Absolutely. The alloy steel used in the 223-6546 is tested to remain ductile and strong from -50°C, preventing brittle fractures in extreme cold-weather excavation.
A: For critical load-bearing mounts, we recommend replacing them with new 223-6546 bolts to ensure maximum safety, as used fasteners often suffer from invisible micro-cracks or thread deformation.
A: We provide original, OEM, and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companie





















