The Caterpillar 3B-0623 Hex Nut is a high-tensile, heavy-duty mechanical fastener. It is engineered to maintain constant clamping force and resist stripping across structural panel groups, linkage setups, and general engine bracket assemblies subject to continuous machine vibration.
1. Core Dimensions & Fastener Specs
- Thread Size: 3/8 inch
- Hole Thread Pitch: 16 threads per inch (3/8-16 UNC Coarse Thread)
- Nut Thickness / Height: 8.33 mm (0.328 in)
- Drive / Hex Width Across Flats: 14.29 mm (9/16 in)
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Net Weight: 0.007 kg (0.016 lbs)
2. Material & Manufacturing Specs
- Material Grade: High-strength hardened carbon or alloy steel matrix (SAE J995 Grade 8 equivalent).
- Coating & Finish: Premium corrosion-resistant zinc plating or clear chromate finish to prevent thread galling and environmental oxidation.
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Thread Hand: Standard Right-Hand (RH).
3. Equipment & System Compatibility
This coarse-threaded hex nut is standard mechanical hardware widely integrated across thousands of Caterpillar equipment chassis, engine blocks, and fluid systems:
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Engine Blocks & Groups: Deployed within auxiliary bracket mounts, fuel filter base groups, and wiring harness clamps for CAT 3304, 3306, 3406, 3408, 3508, 3512, and 3516 engine architectures.
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Heavy Construction Machinery: Found in structural panels, battery boxes, radiator supports, and operator cabs of Caterpillar D4, D5, D6, and D7 Track-Type Tractors.
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Earthmoving & Excavator Lines: Standard service hardware utilized within basic engine enclosures, exhaust guards, and hydraulic tube routing clamps on CAT wheel loaders, motor graders, and crawler excavators.
4. Part Cross-References
- Alternative Part Names: Coarse Thread Hex Nut, Full Finished Hex Nut.
- Alternative Part Numbers: 3B0623, 3B-0623.
