S113
Hexagon Head Cap Screw
Cummins®

The S113 Hexagon Head Cap Screw, a product by Cummins, is a critical component in the commercial truck industry. Designed for heavy-duty applications, this screw is essential for the assembly and maintenance of various truck components. Understanding its design, function, and benefits provides valuable insights into its application and significance in the trucking sector.

Basic Concepts of Hexagon Head Cap Screws

A Hexagon Head Cap Screw is a fastener with a hexagonal socket head, allowing efficient torque application using a hex key. This design minimizes slippage and cam-out, ensuring a secure grip and reliable fastening ¹.

Role of S113 in Truck Operation

In commercial trucks, the S113 is used in the assembly of the engine, chassis, and other critical components. Its design allows for precise torque application, crucial for maintaining the correct tension in assemblies and ensuring structural integrity and operational efficiency ².

Key Features

The S113 boasts several features that enhance its performance and durability. Made from high-strength materials like alloy steel, it provides the necessary tensile strength for heavy-duty applications. It features fine or coarse threads for effective gripping and may be treated with special coatings or heat treatments to improve resistance to corrosion and wear ³.

Benefits

Using the S113 in truck maintenance and assembly offers several advantages. Its design contributes to improved fastening security, reducing the likelihood of loosening over time. The ease of installation and removal with a hex key simplifies maintenance procedures, saving time and labor. Furthermore, its resistance to corrosion and wear enhances the reliability of truck components, contributing to the overall durability and performance of the vehicle ⁴.

Troubleshooting and Maintenance

Common issues with Hexagon Head Cap Screws, such as loosening or corrosion, can be addressed through proper maintenance practices. Regular inspection and tightening of screws can prevent loosening, while the application of anti-corrosion treatments can mitigate environmental effects. Ensuring correct torque specifications during installation is crucial for maintaining fastening integrity.

Cummins Engines Utilizing S113

The S113 is a versatile component utilized across a range of Cummins engines. It is integral to the assembly and maintenance of various engine parts, ensuring secure fastening and stability.

Medium-Duty Engines

• 6C8.3
• K19
• K38
• K50
• KTA19GC
• KTA19GC CM558
• L10 MECHANICAL

Heavy-Duty Engines

• G855
• G855 CM558
• GTA38 G CMEICS G116C
• GTA855 CM558 (CM2358) G101
• KTA38GC CM558
• QSK19 CM2350 K105
• QSK19 CM2350 K114
• QSK19 CM2350 K144G
• QSK19 CM500
• QSK19 CM850 MCRS
• QSK19G

Engines with CELECT Technology

• M11 CELECT PLUS
• M11 MECHANICAL
• N14 CELECT
• N14 CELECT PLUS
• N14 G
• N14 MECHANICAL

Specialized Engines

• NH/NT 855

Role of S113 in Engine Systems

The S113 is integral to the assembly and functionality of various engine components. Its design allows for secure fastening, ensuring components remain firmly in place under operational stress.

Applications

• Aftercooler Plumbing: Secures fittings and connections.
• Alternator Drive: Fastens the alternator to the engine.
• Base Mounting Rail: Attaches the rail to the engine frame.
• Cooler: Secures fins, tubes, and critical elements.
• Torque Converter Mounting: Ensures a secure connection.
• Coupling: Attaches coupling halves.
• Debris Shield: Mounts debris shields.
• Drive Arrangement: Secures gears and shafts.
• Engine Repair Stand Fixture: Holds the engine in place during maintenance.
• Flexplate and Flywheel: Secures these components to the crankshaft.
• Hydraulic Pump Mounting Adapter: Attaches the adapter.
• Idler Gear: Secures idler gears.
• Lubricating Oil Supply Mounting Tube: Mounts the tube.
• Oil Pan Mounting: Attaches the oil pan to the engine.
• Radiator and Fan: Secures the fan to the radiator.
• Radiator Shroud and Guard: Attaches the shroud and guard.
• Radiator Support: Mounts the radiator support.
• Turbocharger: Secures the turbocharger to the engine.

Conclusion

The S113 Hexagon Head Cap Screw is a vital component in the commercial truck industry, offering reliability, durability, and ease of maintenance. Its widespread use across various Cummins engines underscores its importance in maintaining the structural integrity and operational efficiency of these engines.