4991495
Hexagon Flange Head Cap Screw
Cummins®

The Hex Flange Head Cap Screw, identified by Part #4991495, is a component manufactured by Cummins, a leader in the commercial truck industry. This screw is integral to the maintenance and assembly of commercial trucks, providing secure fastening solutions that contribute to the overall reliability and performance of truck components.

Basic Concepts

A Hex Flange Head Cap Screw is a type of fastener characterized by a hexagonal head and a flange beneath the head. The hexagonal head allows for efficient tightening and loosening using a wrench or socket, while the flange distributes the load over a larger area, reducing the risk of the screw pulling through the material. In a truck’s assembly, these screws are used to join components securely, ensuring that parts remain fixed under various operational stresses.

Purpose and Role

This Cummins part serves a specific purpose in truck operations by securing critical components in place. Its application areas include fastening engine parts, body panels, and other structural elements where high tensile strength and resistance to vibration are required. This screw plays a role in maintaining the structural integrity and functionality of the truck by providing a secure and stable connection between parts.

Key Features

The 4991495 features a hex-shaped head for easy engagement with tools, a flange that enhances load distribution, and is made from materials that offer high tensile strength and corrosion resistance. These features contribute to the screw’s performance and durability, making it suitable for demanding applications in the commercial truck industry.

Benefits

Using the 4991495 offers several benefits, including enhanced fastening security due to its design, resistance to vibration which ensures that connections remain tight under dynamic conditions, and ease of installation and removal thanks to its hex head. These attributes make it a reliable choice for critical fastening applications in commercial trucks.

Installation Process

Proper installation of the 4991495 involves several steps to ensure a secure and lasting connection. It is important to align the screw correctly with the intended fastening points and use the appropriate torque specifications to avoid over-tightening or under-tightening. Following manufacturer guidelines for installation ensures that the screw performs as intended and contributes to the truck’s overall reliability.

Troubleshooting and Maintenance

Common issues with Hex Flange Head Cap Screws include loosening due to vibration, corrosion, and damage from improper installation. Troubleshooting may involve inspecting the screw and surrounding components for signs of wear or damage, ensuring correct torque has been applied, and addressing any environmental factors that may contribute to corrosion. Regular maintenance, including inspection and replacement as necessary, helps ensure the longevity and performance of these screws.

Cummins Overview

Cummins Inc. is a global power leader that designs, manufactures, and distributes engines, filtration, and power generation products. With a history of innovation and commitment to quality, Cummins serves commercial truck, bus, construction, agricultural, and industrial markets. The company’s extensive product range and focus on customer satisfaction underscore its position as a trusted partner in the commercial truck industry.

Cummins Engine Compatibility with Hex Flange Head Cap Screw Part 4991495

This Cummins part is a critical component in the assembly and maintenance of various Cummins engines. This screw is designed to provide secure fastening in applications where a robust and reliable connection is essential. Below is a detailed description of how this part fits with the listed Cummins engines.

15N CM2380 M104B, 4B3.9, 6B5.9, 6C8.3, B5.9 CM2670 B166C, B5.9 GAS PLUS CM556

This screw is compatible with the engines 15N CM2380 M104B, 4B3.9, 6B5.9, 6C8.3, B5.9 CM2670 B166C, and B5.9 GAS PLUS CM556. This screw is used in various applications within these engines, including securing engine covers, mounting brackets, and other critical components. Its flange head design ensures a broad bearing surface, distributing the load evenly and preventing damage to the mating surfaces.

B6.7 CM2350 B135B, B6.7 CM2670 B153B, B6.7 G CMOH6.0 B125

For the engines B6.7 CM2350 B135B, B6.7 CM2670 B153B, and B6.7 G CMOH6.0 B125, the Hex Flange Head Cap Screw is utilized in similar applications. It is essential for securing various engine components, ensuring that parts remain tightly fastened under operational stresses. The screw’s design allows for easy installation and removal, making it a practical choice for maintenance and repair tasks.

C GAS PLUS CM556, D4.0 CM2620 D103B

The engines C GAS PLUS CM556 and D4.0 CM2620 D103B also benefit from the use of the Hex Flange Head Cap Screw. This screw is used in securing engine covers and other structural components, providing the necessary strength and reliability to withstand the operational demands of these engines.

F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, F3.8 F102

In the engines F3.8 CM2350 F120B, F3.8 CM2350 F128C, F3.8 CM2620 F137B, and F3.8 F102, the Hex Flange Head Cap Screw is employed to secure various engine parts. Its design ensures that these components remain firmly attached, contributing to the overall integrity and performance of the engine.

F4.5 CM2620 F139B, F4.5 CM2620 F141C

The engines F4.5 CM2620 F139B and F4.5 CM2620 F141C utilize the Hex Flange Head Cap Screw for securing critical engine components. This screw’s robust design ensures that parts remain securely fastened, even under high operational stresses.

ISB/ISD4.5 CM2150 B119, ISB5.9 CM2880 B127, ISBE CM2150, ISBE4 CM850, ISD4.5 CM2220 D108

This screw is compatible with the engines ISB/ISD4.5 CM2150 B119, ISB5.9 CM2880 B127, ISBE CM2150, ISBE4 CM850, and ISD4.5 CM2220 D108. This screw is used in securing various engine components, ensuring that parts remain tightly fastened and contributing to the engine’s overall performance and reliability.

ISF3.8 CM2220 AN, ISF3.8 CM2220 F103, ISF3.8 CM2350 F109

For the engines ISF3.8 CM2220 AN, ISF3.8 CM2220 F103, and ISF3.8 CM2350 F109, the Hex Flange Head Cap Screw is used to secure various engine parts. Its design ensures that components remain firmly attached, contributing to the engine’s overall integrity and performance.

Role of Part 4991495 Hex Flange Head Cap Screw in Various Engine Components

The 4991495 is a versatile fastener utilized in several key engine components to ensure secure assembly and reliable operation. Here’s how it integrates with various engine systems:

Air Compressor

In air compressors, the Hex Flange Head Cap Screw is employed to fasten the compressor housing to its mounting bracket. This secure attachment is essential for maintaining the structural integrity of the compressor, ensuring it can withstand the pressures generated during operation.

Alternator Drive

For the alternator drive system, this screw is used to attach the alternator to the engine block or mounting bracket. A firm connection is vital to ensure the alternator remains stable and can efficiently convert mechanical energy into electrical energy without vibrations or misalignments.

Cylinder Head

Within the cylinder head assembly, the Hex Flange Head Cap Screw plays a role in securing the head to the engine block. This connection is fundamental for maintaining the seal between the head and block, which is necessary for proper combustion chamber integrity and preventing coolant or oil leaks.

Cylinder Top Level Assembly Head

In more complex cylinder top-level assemblies, these screws are used to fasten various components, such as valve covers or additional sensor mounts. Their role is to provide a robust and vibration-resistant attachment, crucial for the precise operation of the engine’s upper components.

Fan Drive Belt

The Hex Flange Head Cap Screw is utilized in securing the fan drive belt tensioner. Proper tensioning of the belt is essential for efficient cooling system operation, ensuring the engine maintains optimal temperature under varying load conditions.

Flywheel Housing

In the flywheel housing, these screws are used to attach the housing to the engine block. This secure attachment is important for the flywheel’s function in storing rotational energy and smoothing out the power delivery from the engine.

Rocker Lever

For the rocker lever mechanism, the Hex Flange Head Cap Screw is used to fasten the rocker arms to their respective shafts. This ensures that the rocker arms remain in proper alignment and can effectively transfer motion from the camshaft to the valves.

Rocker Lever Top Level Assembly

In the rocker lever top-level assembly, these screws secure various components, such as the rocker arm pivot points or additional brackets. This ensures the entire assembly operates smoothly and efficiently, contributing to the engine’s overall performance.

Thermostat Housing

The Hex Flange Head Cap Screw is employed in attaching the thermostat housing to the engine. This secure fitting is essential for maintaining the integrity of the cooling system, ensuring the thermostat can regulate engine temperature effectively.

Water Inlet Connection

For the water inlet connection, these screws are used to fasten the inlet to the engine block or cylinder head. A secure connection here is vital to prevent coolant leaks and ensure consistent coolant flow through the engine.

Water Pump Drive

In the water pump drive system, the Hex Flange Head Cap Screw is used to attach the water pump to the engine block or its mounting bracket. This ensures the water pump remains firmly in place, allowing it to circulate coolant efficiently throughout the engine.

Conclusion

The Hex Flange Head Cap Screw, part number 4991495, is a critical component in the assembly and maintenance of Cummins engines. Its design and features make it suitable for a wide range of applications, ensuring secure fastening and reliable operation of various engine components. Proper installation, maintenance, and understanding of its role in different engine systems are essential for maximizing the performance and longevity of commercial trucks.