The Caterpillar 464-9191 12-Point Head Bolt is a high-tensile, heavy-duty mechanical locking fastener. It is engineered to maintain extreme clamping force and prevent joint relaxation across engines, powertrains, and high-stress engine block attachments subject to relentless machine vibrations.
-
Core Dimensions & Fastener Specs
Bolt Length: 8.50 in (215.9 mm)
Grip Length: 6.00 in (152.4 mm)
Flange Diameter: 1.13 in (28.7 mm)
Thread Size: 3/4 inch - 16 (3/4-16 UNF Fine Thread)
Drive Style: Heavy-duty 12-Point Head
-
Material & Manufacturing Specs
Material Grade: Premium high-strength hardened alloy steel engineered to resist severe fatigue.
Coating & Finish: Corrosion-resistant protective treatment to prevent thread seizing, friction spikes, and environmental rust.
Thread Hand: Standard Right-Hand (RH).
Design Optimization: 12-point head geometry allows for maximum torque application and tighter packaging clearance compared to standard hex head profiles.
-
Equipment & System Compatibility
This high-fatigue structural bolt is standard heavy-duty hardware deployed across a selection of large-scale Caterpillar heavy machinery, powertrain setups, and high-horsepower engine platforms:
Engine Platforms: Typically integrated into core block structures, cylinder heads, main bearing caps, and high-load powertrain component couplings.
Heavy Machinery: Utilized within major machine systems where superior fatigue strength and compact clearance are required for mechanical joints.
-
Part Cross-References
Alternative Part Names: 12-Point Flange Bolt, 12-Point Head Bolt, Counterbored Cylinder Head Bolt.
Alternative Part Numbers: 4649191, 464-9191.
