Product Description
Cummins 3920780 OEM Hexagon Flange Head Cap Screw (Cylinder Head Bolt) – 5.9L 12-Valve Cummins 1989-1998
The Cummins 3920780 OEM Hexagon Flange Head Cap Screw is a genuine Cummins replacement cylinder head bolt designed for 5.9L 12-valve Cummins diesel engines. Manufactured to meet original equipment specifications, this OEM head bolt provides the proper clamping force required to maintain cylinder head sealing, combustion pressure containment, and long-term engine reliability.
Whether you're performing a complete engine rebuild, cylinder head replacement, head gasket service, or preventative maintenance on your 1989-1998 Dodge Ram Cummins, the Cummins 3920780 cylinder head bolt delivers factory-quality fit, strength, and durability. Using genuine OEM hardware helps ensure proper torque retention and consistent sealing performance in stock and lightly modified applications.
Features
- Genuine Cummins OEM replacement part
- Direct replacement cylinder head bolt
- Hexagon flange head cap screw design
- Manufactured to factory Cummins specifications
- Provides proper cylinder head clamping force
- Helps maintain head gasket sealing integrity
- Ideal for engine rebuilds and head gasket repairs
- Designed for long service life and durability
- Direct-fit installation
- Trusted OEM quality and reliability
Fitment
- 1989 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1990 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1991 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1992 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1993 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1994 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1995 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1996 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1997 Dodge Ram 2500 5.9L Cummins 12-Valve
- 1998 Dodge Ram 2500 and 3500 5.9L Cummins 12-Valve
Note: Always verify engine serial number and application before ordering. Cummins recommends following factory service manual torque procedures and inspecting all related fasteners during engine repairs.
What's Included
- One (1) Genuine Cummins 3920780 Cylinder Head Bolt
Specifications
- Manufacturer: Cummins
- Part Number: 3920780
- Part Type: Hexagon Flange Head Cap Screw
- Application: Cylinder Head Bolt
- Engine Compatibility: 5.9L 12-Valve Cummins
- Engine Series: 6BT Cummins
- Fuel System: Mechanical Injection
- Material: OEM High-Strength Steel
- Finish: Factory Corrosion-Resistant Coating
- Installation Location: Cylinder Head
- Fitment Years: 1989-1998
- OEM Replacement: Yes
Cross Reference Numbers
3920780, Cummins 3920780, OEM Cummins Head Bolt, 6BT Cylinder Head Bolt, 5.9 Cummins Head Bolt, Hex Flange Head Cap Screw
FAQ
What is the Cummins 3920780 used for?
The Cummins 3920780 is an OEM cylinder head bolt used to secure the cylinder head to the engine block on 5.9L 12-valve Cummins engines.
Is this a genuine Cummins part?
Yes. The 3920780 is a genuine Cummins OEM replacement component manufactured to original equipment specifications.
Should cylinder head bolts be replaced during a head gasket repair?
Many engine builders recommend replacing cylinder head fasteners during major engine repairs to ensure proper clamping force and long-term reliability.
Will this fit a 24-valve Cummins engine?
This part is primarily associated with 1989-1998 5.9L 12-valve Cummins applications. Always verify fitment using your engine serial number before ordering.
Can I reuse old cylinder head bolts?
Inspection requirements vary by application, but replacing critical fasteners during engine service is generally considered best practice for maintaining proper cylinder head sealing.
Why use OEM Cummins hardware?
Genuine Cummins hardware is engineered to meet factory specifications for strength, fitment, and durability, helping ensure proper engine performance and reliability.
