Diesel Engine Plugs

Genuine Diesel Engine Plugs for Onan, Cummins, and Fleetguard Power Engines

Maintain the integrity and efficiency of your diesel power equipment with our authentic Diesel Engine Plugs. Engineered specifically for Onan, Cummins, and Fleetguard engines, these plugs ensure a perfect fit and long-lasting durability under demanding conditions.

Diesel Engine Plugs - Reliable & Genuine Components by Onan, Cummins, Fleetguard

Our selection features a range of genuine diesel engine plugs designed to seal engine ports effectively, preventing leaks and protecting your engine from contaminants. Crafted from premium materials, these plugs offer superior corrosion resistance and thermal stability.

  • Authentic Quality: Direct-fit plugs manufactured to OEM specifications for trusted performance.
  • Durable Construction: High-grade materials ensure longevity and withstand harsh operating environments.
  • Wide Compatibility: Suitable for various Onan, Cummins, and Fleetguard diesel engine models.

Upgrade your diesel engine maintenance with our genuine plugs, designed to maximize reliability and extend engine life.

Why Choose Our Diesel Engine Plugs?

We provide only genuine, brand-approved parts to ensure optimal engine performance, backed by expert guidance and trusted customer support for your peace of mind.

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  • CUMMINS 4095555 - THREADED PLUG - Original OEM part - Image 1
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    CUMMINS 4095555 THREADED PLUG Original OEM part

    CUMMINS

    $145.97
    $133.35
    Engineered for excellence, designed to last. Superior sealing capability ensures leak-free operation under demanding conditions. Robust construction crafted to withstand high temperatures and...
    $145.97
    $133.35
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    Qty in Cart: 0
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    $145.97
    $133.35
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  • CUMMINS 4093857 - PIPE PLUG - Original OEM part - Image 1
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    CUMMINS 4093857 PIPE PLUG Original OEM part

    CUMMINS

    $7.00
    $6.40
    Precision-engineered to maintain system integrity under demanding conditions Durable design that withstands high pressure and temperature fluctuations Authentic Cummins OEM component guarantees full...
    $7.00
    $6.40
    Add to Cart
    Qty in Cart: 0
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    Price:
    $7.00
    $6.40
    Subtotal:
  • CUMMINS 4090125 - PIPE PLUG - Original OEM part - Image 1
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    CUMMINS 4090125 PIPE PLUG Original OEM part

    CUMMINS

    $45.85
    $41.88
    Engineered to empower your Cummins system’s reliability Exceptional sealing capability to prevent leaks and maintain system pressure Manufactured from high-grade materials ensuring long-term...
    $45.85
    $41.88
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    Qty in Cart: 0
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    Price:
    $45.85
    $41.88
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  • CUMMINS 4089473 - ORING PLUG - Original OEM part - Image 1
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    CUMMINS 4089473 ORING PLUG Original OEM part

    CUMMINS

    $244.79
    $223.62
    Engineered Excellence: Designed to secure critical sealing points, preventing leaks and maintaining engine integrity under demanding conditions. Durability You Can Trust: Constructed with premium...
    $244.79
    $223.62
    Add to Cart
    Qty in Cart: 0
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    Price:
    $244.79
    $223.62
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  • CUMMINS 4089255 - CAVITY PLUG - Original OEM part - Image 1
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    CUMMINS 4089255 CAVITY PLUG Original OEM part

    CUMMINS

    $8.60
    $7.86
    Engineered Excellence for Unyielding Durability Precision-fit design securing optimal cavity sealing Resistant to wear and high-temperature environments 100% Genuine OEM Cummins craftsmanship...
    $8.60
    $7.86
    Add to Cart
    Qty in Cart: 0
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    Price:
    $8.60
    $7.86
    Subtotal:
  • CUMMINS 4088807 - THREADED PLUG - Original OEM part - Image 1
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    CUMMINS 4088807 THREADED PLUG Original OEM part

    CUMMINS

    $21.15
    $19.32
    Precision engineered for uncompromised performance and reliability Durable design resists wear and maintains engine integrity Essential OEM component ensuring full compatibility and...
    $21.15
    $19.32
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    Qty in Cart: 0
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    Price:
    $21.15
    $19.32
    Subtotal:
  • CUMMINS 4088806 - THREADED PLUG - Original OEM part - Image 1
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    CUMMINS 4088806 THREADED PLUG Original OEM part

    CUMMINS

    $17.17
    $15.69
    Precision engineered for enduring reliability and seamless integration Designed to maintain essential fluid containment and pressure integrity Manufactured as an authentic OEM Cummins component for...
    $17.17
    $15.69
    Add to Cart
    Qty in Cart: 0
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    Price:
    $17.17
    $15.69
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  • CUMMINS 4086073 - THREADED PLUG - Original OEM part - Image 1
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    CUMMINS 4086073 THREADED PLUG Original OEM part

    CUMMINS

    $222.43
    $203.19
    Precision engineered for seamless system integrity Exceptional durability to maintain engine health under demanding conditions 100% genuine OEM CUMMINS component guaranteeing perfect...
    $222.43
    $203.19
    Add to Cart
    Qty in Cart: 0
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    Price:
    $222.43
    $203.19
    Subtotal:
  • CUMMINS 4076599 - ORIFICE PLUG - Original OEM part - Image 1
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    CUMMINS 4076599 ORIFICE PLUG Original OEM part

    CUMMINS

    $70.22
    $64.14
    Precision-crafted to ensure optimal fuel delivery and engine efficiency Designed to maintain consistent flow rates for superior engine performance 100% genuine Cummins OEM for guaranteed...
    $70.22
    $64.14
    Add to Cart
    Qty in Cart: 0
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    Price:
    $70.22
    $64.14
    Subtotal:
  • CUMMINS 4068034 - EXPANSION PLUG - Original OEM part - Image 1
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    CUMMINS 4068034 EXPANSION PLUG Original OEM part

    CUMMINS

    $20.69
    $18.90
    Precision engineering that powers your Cummins engine with uncompromising dependability. Durable construction designed to withstand extreme pressures and temperatures. Ensures optimal sealing and...
    $20.69
    $18.90
    Add to Cart
    Qty in Cart: 0
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    Price:
    $20.69
    $18.90
    Subtotal:
  • CUMMINS 4066811 - BALL PLUG - Original OEM part - Image 1
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    CUMMINS 4066811 BALL PLUG Original OEM part

    CUMMINS

    $17.78
    $16.24
    Precision engineered for seamless integration and durability Essential for maintaining optimal engine sealing and system integrity Manufactured as a genuine OEM Cummins component for full...
    $17.78
    $16.24
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $17.78
    $16.24
    Subtotal:
  • CUMMINS 4066185 - EXPANSION PLUG - Original OEM part - Image 1
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    CUMMINS 4066185 EXPANSION PLUG Original OEM part

    CUMMINS

    $36.37
    $33.23
    Built to deliver unmatched sealing precision for engine protection Designed for durability, ensuring long-term engine vitality under demanding conditions Guaranteed genuine OEM quality from Cummins...
    $36.37
    $33.23
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $36.37
    $33.23
    Subtotal:
  • CUMMINS 4065627 - DRIVE PLUG - Original OEM part - Image 1
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    CUMMINS 4065627 DRIVE PLUG Original OEM part

    CUMMINS

    $10.57
    $9.66
    Precision engineered for uncompromising reliability Seamless fit to maintain optimal engine performance Essential for maintaining system integrity and minimizing wear 100% genuine OEM Cummins part...
    $10.57
    $9.66
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $10.57
    $9.66
    Subtotal:
  • CUMMINS 4059434 - THREADED PLUG - Original OEM part - Image 1
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    CUMMINS 4059434 THREADED PLUG Original OEM part

    CUMMINS

    $58.49
    $53.43
    Precision engineered for uncompromised durability and fit Essential for maintaining optimal engine sealing and performance 100% genuine OEM Cummins component for trusted reliability Unlock Enduring...
    $58.49
    $53.43
    Add to Cart
    Qty in Cart: 0
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    Price:
    $58.49
    $53.43
    Subtotal:
  • CUMMINS 4026918 - THREADED PLUG - Original OEM part - Image 1
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    CUMMINS 4026918 THREADED PLUG Original OEM part

    CUMMINS

    $12.90
    $11.79
    Precision-engineered reliability for uncompromising power system integrity Designed to deliver long-lasting performance even under demanding operating conditions Original Equipment Manufacturer...
    $12.90
    $11.79
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $12.90
    $11.79
    Subtotal:
  • CUMMINS 4017622 - EXPANSION PLUG - Original OEM part - Image 1
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    CUMMINS 4017622 EXPANSION PLUG Original OEM part

    CUMMINS

    $18.28
    $16.70
    Engineered for precision, built for endurance. Corrosion-resistant design ensuring long-term sealing efficiency. Perfect fit guaranteed by Cummins’ exacting OEM standards. Authentic Cummins part...
    $18.28
    $16.70
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $18.28
    $16.70
    Subtotal:
  • CUMMINS 4013551 - EXPANSION PLUG - Original OEM part - Image 1
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    CUMMINS 4013551 EXPANSION PLUG Original OEM part

    CUMMINS

    $1,085.09
    $991.23
    Ensuring precision and durability where it counts. Engineered to withstand extreme conditions and maintain sealing integrity. Corrosion-resistant construction for extended service life. 100% genuine...
    $1,085.09
    $991.23
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $1,085.09
    $991.23
    Subtotal:
  • CUMMINS 4006411 - EXPANSION PLUG - Original OEM part - Image 1
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    CUMMINS 4006411 EXPANSION PLUG Original OEM part

    CUMMINS

    $177.20
    $161.88
    Engineered for precision, built to last, your power's silent guardian. Crafted from premium materials to provide superior sealing and corrosion resistance. Designed specifically to maintain engine...
    $177.20
    $161.88
    Add to Cart
    Qty in Cart: 0
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    Price:
    $177.20
    $161.88
    Subtotal:
  • CUMMINS 4002056 - THREADED PLUG - Original OEM part - Image 1
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    CUMMINS 4002056 THREADED PLUG Original OEM part

    CUMMINS

    $45.07
    $41.17
    Precision-engineered sealing solution that maintains engine integrity under demanding conditions. Durable materials built to withstand extreme temperatures and pressure fluctuations. Authentic OEM...
    $45.07
    $41.17
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $45.07
    $41.17
    Subtotal:
  • CUMMINS 3999673 - THREADED PLUG - Original OEM part - Image 1
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    CUMMINS 3999673 THREADED PLUG Original OEM part

    CUMMINS

    $16.96
    $15.49
    Precision engineered to secure your power system's integrity Durable corrosion-resistant material designed for extended service life Compatible with a wide range of Cummins engines and generator...
    $16.96
    $15.49
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $16.96
    $15.49
    Subtotal:
  • CUMMINS 3977855 - THREADED PLUG - Original OEM part - Image 1
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    CUMMINS 3977855 THREADED PLUG Original OEM part

    CUMMINS

    $16.36
    $14.95
    Engineered for Precise Seal Integrity: This threaded plug ensures leak-proof protection in your Cummins system. Durable Corrosion Resistance: Crafted from high-quality materials for extended service...
    $16.36
    $14.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $16.36
    $14.95
    Subtotal:
  • CUMMINS 3977854 - THREADED PLUG - Original OEM part - Image 1
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    CUMMINS 3977854 THREADED PLUG Original OEM part

    CUMMINS

    $16.40
    $14.99
    Engineered for precision and reliability in every detail Provides a secure, leak-proof seal essential for engine health Manufactured as a genuine CUMMINS OEM component to guarantee compatibility and...
    $16.40
    $14.99
    Add to Cart
    Qty in Cart: 0
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    Price:
    $16.40
    $14.99
    Subtotal:
  • CUMMINS 3977853 - THREADED PLUG - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3977853 THREADED PLUG Original OEM part

    CUMMINS

    $14.67
    $13.40
    Seamless integration for unmatched engine protection Precision-engineered to prevent leaks and maintain system integrity Durability that matches the rigorous demands of Cummins power...
    $14.67
    $13.40
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $14.67
    $13.40
    Subtotal:
  • CUMMINS 3977852 - THREADED PLUG - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3977852 THREADED PLUG Original OEM part

    CUMMINS

    $14.96
    $13.67
    Precision engineered to uphold Cummins' legacy of durability and power integrity Designed for leak-proof sealing ensuring optimal engine performance Crafted from premium materials to withstand harsh...
    $14.96
    $13.67
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $14.96
    $13.67
    Subtotal:
  • CUMMINS 3977851 - PLUG THREADED-IMAGE1
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    CUMMINS 3977851 THREADED PLUG Original OEM part

    CUMMINS

    $13.83
    $12.63
    Engineered to perfection for dependable sealing solutions Built to withstand high pressure and harsh operating conditions 100% genuine OEM Cummins component ensuring compatibility and...
    $13.83
    $12.63
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $13.83
    $12.63
    Subtotal:
  • CUMMINS 3976857 - ORIFICE PLUG - Original OEM part - Image 1
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    CUMMINS 3976857 ORIFICE PLUG Original OEM part

    CUMMINS

    $110.75
    $101.17
    Engineered for seamless integration and peak engine efficiency Precision-crafted orifice plug ensuring accurate fluid flow regulation Manufactured as an original OEM Cummins component for assured...
    $110.75
    $101.17
    Add to Cart
    Qty in Cart: 0
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    Price:
    $110.75
    $101.17
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  • CUMMINS 3976056 - ORING PLUG - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3976056 ORING PLUG Original OEM part

    CUMMINS

    $130.57
    $119.28
    Precision-engineered sealing for uncompromised engine integrity Designed to withstand demanding operational conditions and extend service life Genuine OEM part from Cummins ensuring flawless...
    $130.57
    $119.28
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $130.57
    $119.28
    Subtotal:
  • CUMMINS 3970463 - ZINC ELECTRODE PLUG - Original OEM part - Image 1
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    CUMMINS 3970463 ZINC ELECTRODE PLUG Original OEM part

    CUMMINS

    $71.93
    $65.71
    Unwavering protection for your Cummins power system Corrosion-resistant zinc electrode designed for extended service life Precision engineering tailored for seamless integration and peak...
    $71.93
    $65.71
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $71.93
    $65.71
    Subtotal:
  • CUMMINS 3968702 - PLUG,GEAR HOUSING - Original OEM part - Image 1
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    CUMMINS 3968702 PLUG,GEAR HOUSING Original OEM part

    CUMMINS

    $115.45
    $105.46
    Engineered Excellence, Trusted Performance. Precision fit ensuring seamless gear housing protection. Durable design enhances long-term engine health and reliability. 100% OEM Cummins part assuring...
    $115.45
    $105.46
    Add to Cart
    Qty in Cart: 0
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    Price:
    $115.45
    $105.46
    Subtotal:
  • CUMMINS 3946947 - THREADED PLUG - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3946947 THREADED PLUG Original OEM part

    CUMMINS

    $31.60
    $28.87
    Precision-engineered for seamless integration into your Cummins power system ensuring optimal sealing and durability. Crafted from high-quality materials to resist wear, corrosion, and maintain...
    $31.60
    $28.87
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $31.60
    $28.87
    Subtotal:
  • FLEETGUARD 3946905-S - 3946905S PACK PLUG Original FLEETGUARD OEM part - Original OEM part - Image 1
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    FLEETGUARD 3946905S PACK PLUG Original FLEETGUARD OEM part

    FLEETGUARD

    $45.42
    $41.49
    Fleetguard 3946905-S - PACK PLUG FLG3946905-S Discover the genuine Fleetguard 3946905-S - PACK PLUG, available at our online store. Engineered to meet strict quality standards, this original...
    $45.42
    $41.49
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $45.42
    $41.49
    Subtotal:
  • CUMMINS 3945325 - THREADED PLUG - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3945325 THREADED PLUG Original OEM part

    CUMMINS

    $135.18
    $123.49
    Cummins 3945325 - THREADED PLUG MINS3945325 When it comes to high-quality replacement parts like the 3945325 - THREADED PLUG from Cummins, our store is your best choice. We offer genuine products at...
    $135.18
    $123.49
    Add to Cart
    Qty in Cart: 0
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    Price:
    $135.18
    $123.49
    Subtotal:
  • CUMMINS 3945098 - PLUG EXPANSION-IMAGE1
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    CUMMINS 3945098 EXPANSION PLUG Original OEM part

    CUMMINS

    $10.33
    $9.43
    Precision-engineered component crafted for seamless integration with Cummins power systems Robust design for superior sealing and protection against leaks Guaranteed OEM authenticity ensuring...
    $10.33
    $9.43
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $10.33
    $9.43
    Subtotal:
  • CUMMINS 3945097 - PLUG EXPANSION-IMAGE1
    Add to Cart

    CUMMINS 3945097 EXPANSION PLUG Original OEM part

    CUMMINS

    $4.72
    $4.31
    Cummins 3945097 - EXPANSION PLUG MINS3945097 Our store is your ultimate destination for top-quality original 3945097 - EXPANSION PLUG by Cummins. Crafted with precision and reliability in mind, this...
    $4.72
    $4.31
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $4.72
    $4.31
    Subtotal:
  • CUMMINS 3945094 - PLUG EXPANSION-IMAGE1
    Add to Cart

    CUMMINS 3945094 EXPANSION PLUG Original OEM part

    CUMMINS

    $10.25
    $9.36
    Trusted durability for critical engine sealing Precision-engineered to prevent leaks and maintain engine integrity Genuine OEM Cummins component, designed for seamless compatibility and peak...
    $10.25
    $9.36
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $10.25
    $9.36
    Subtotal:
  • CUMMINS 3940116 - BYPASS PLUG - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3940116 BYPASS PLUG Original OEM part

    CUMMINS

    $66.69
    $60.93
    Precision-engineered to maintain seamless engine operation Durability under demanding conditions for long-term reliability 100% genuine Cummins OEM component ensuring perfect compatibility CUMMINS...
    $66.69
    $60.93
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $66.69
    $60.93
    Subtotal:
  • FLEETGUARD 3939413-S - 3939413S EXPANDER PLUG Original FLEETGUARD OEM part - Original OEM part - Image 1
    Add to Cart

    FLEETGUARD 3939413S EXPANDER PLUG Original FLEETGUARD OEM part

    FLEETGUARD

    $160.29
    $146.43
    Fleetguard 3939413-S - EXPANDER PLUG FLG3939413-S Looking for a reliable EXPANDER PLUG, SKU FLG3939413-S by Fleetguard Look no further! We offer only original 3939413-S parts, ensuring a perfect fit...
    $160.29
    $146.43
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $160.29
    $146.43
    Subtotal:
  • CUMMINS 3936642 - PIPE PLUG - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3936642 PIPE PLUG Original OEM part

    CUMMINS

    $7.33
    $6.69
    Engineered to Perfection: Precision-crafted for seamless integration and leak-proof sealing. Durability That Lasts: Manufactured to withstand rigorous engine conditions and ensure long-term...
    $7.33
    $6.69
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $7.33
    $6.69
    Subtotal:
  • CUMMINS 3936641 - PIPE PLUG - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3936641 PIPE PLUG Original OEM part

    CUMMINS

    $18.75
    $17.13
    Engineered for seamless integration and lasting protection in your Cummins power system Highly durable construction to withstand demanding pressures and harsh environments Designed to maintain...
    $18.75
    $17.13
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $18.75
    $17.13
    Subtotal:
  • CUMMINS 3935468 - THREADED PLUG - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3935468 THREADED PLUG Original OEM part

    CUMMINS

    $15.45
    $14.11
    Precision-engineered reliability from Cummins: the heart of dependable power solutions Robust threaded design ensures leak-proof sealing under demanding conditions Corrosion-resistant construction...
    $15.45
    $14.11
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $15.45
    $14.11
    Subtotal:
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