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.
