Diesel Engine Lock Nuts

Genuine Diesel Engine Lock Nuts for Onan, Cummins, and Fleetguard Engines

Maintain the integrity and performance of your diesel engines with our authentic Diesel Engine Lock Nuts. Engineered specifically for Onan, Cummins, and Fleetguard power engines, these lock nuts provide reliable vibration resistance and secure fastening to keep your engine components firmly in place.

Secure Your Diesel Engine Components with Genuine Onan, Cummins & Fleetguard Lock Nuts

Our range includes high-quality nylon lock nuts, all-metal lock nuts, and standard lock nuts, designed to meet the rigorous demands of diesel engine applications. Each lock nut ensures optimal durability, corrosion resistance, and secure fitment to enhance engine reliability.

  • Precision Engineering: Crafted for exact fit on Onan, Cummins, and Fleetguard diesel engines.
  • Durability & Strength: Made from premium alloys to resist wear and maintain engine stability.
  • Enhanced Vibration Resistance: Prevents loosening under extreme engine conditions, ensuring safety and performance.

Upgrade your diesel engine maintenance with our genuine lock nuts, designed to provide lasting security and efficiency.

Why Choose Our Diesel Engine Lock Nuts?

Experience exceptional quality and trusted performance with our genuine Onan, Cummins, and Fleetguard lock nuts—engineered for durability, safety, and optimal power engine operation every time.

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  • CUMMINS 4007602 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 4007602 LOCK NUT Original OEM part

    CUMMINS

    $75.50
    $68.97
    Cummins 4007602 - LOCK NUT MINS4007602 Find peace of mind knowing that you can count on our store to provide you with original Cummins 4007602 - LOCK NUT, ensuring a perfect fit and top-notch...
    $75.50
    $68.97
    Add to Cart
    Qty in Cart: 0
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    Price:
    $75.50
    $68.97
    Subtotal:
  • CUMMINS 4007601 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 4007601 LOCK NUT Original OEM part

    CUMMINS

    $93.95
    $85.82
    Precision-engineered fastening solution inspired by Cummins' legacy of reliability. Durable material composition designed to maintain tight, vibration-resistant connections under extreme conditions...
    $93.95
    $85.82
    Add to Cart
    Qty in Cart: 0
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    $93.95
    $85.82
    Subtotal:
  • CUMMINS 4006785 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 4006785 LOCK NUT Original OEM part

    CUMMINS

    $10.90
    $9.96
    Precision engineered for enduring strength and reliable performance. Essential locking mechanism to maintain secure engine assemblies under demanding conditions. Manufactured to strict Cummins OEM...
    $10.90
    $9.96
    Add to Cart
    Qty in Cart: 0
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    Price:
    $10.90
    $9.96
    Subtotal:
  • CUMMINS 3934021 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3934021 LOCK NUT Original OEM part

    CUMMINS

    $8.52
    $7.78
    Engineered for precision, designed for endurance Robust locking mechanism guarantees secure fastening under extreme engine conditions Manufactured with high-grade materials to resist wear and...
    $8.52
    $7.78
    Add to Cart
    Qty in Cart: 0
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    Price:
    $8.52
    $7.78
    Subtotal:
  • CUMMINS 3930683 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3930683 LOCK NUT Original OEM part

    CUMMINS

    $5.42
    $4.95
    Engineered to lock with precision and reliability under the toughest conditions Designed to ensure long-lasting hold and resistance to vibration Manufactured as a genuine OEM component by Cummins...
    $5.42
    $4.95
    Add to Cart
    Qty in Cart: 0
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    Price:
    $5.42
    $4.95
    Subtotal:
  • CUMMINS 3923041 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3923041 LOCK NUT Original OEM part

    CUMMINS

    $4.72
    $4.31
    Precision engineered for steadfast security in your power system Durable construction guarantees long-lasting vibration resistance Authentic Cummins OEM quality for assured compatibility and...
    $4.72
    $4.31
    Add to Cart
    Qty in Cart: 0
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    Price:
    $4.72
    $4.31
    Subtotal:
  • CUMMINS 3883892 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3883892 LOCK NUT Original OEM part

    CUMMINS

    $6.66
    $6.08
    Precision engineered to keep your Cummins power running strong Exceptional locking strength to resist vibration and maintain assembly integrity Crafted from premium materials to withstand harsh...
    $6.66
    $6.08
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $6.66
    $6.08
    Subtotal:
  • CUMMINS 3772478 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3772478 LOCK NUT Original OEM part

    CUMMINS

    $10.63
    $9.71
    Precision-engineered reliability with Cummins craftsmanship Robust locking mechanism ensures long-lasting secure fit Durable OEM material to maintain engine integrity under demanding conditions 100%...
    $10.63
    $9.71
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $10.63
    $9.71
    Subtotal:
  • CUMMINS 3771005 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3771005 LOCK NUT Original OEM part

    CUMMINS

    $61.02
    $55.74
    Precision Crafted for Enduring Strength and Safety Engineered to maintain optimal fastener tension under extreme conditions Ensures vibration resistance and component integrity 100% Genuine OEM part...
    $61.02
    $55.74
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $61.02
    $55.74
    Subtotal:
  • CUMMINS 3760250 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3760250 LOCK NUT Original OEM part

    CUMMINS

    $15.72
    $14.36
    Experience unmatched durability engineered for rigorous Cummins power systems Precision-fit design to maintain optimal engine performance and safety Certified OEM Cummins part guaranteeing full...
    $15.72
    $14.36
    Add to Cart
    Qty in Cart: 0
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    Price:
    $15.72
    $14.36
    Subtotal:
  • CUMMINS 3758656 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3758656 LOCK NUT Original OEM part

    CUMMINS

    $51.77
    $47.29
    Cummins 3758656 - LOCK NUT MINS3758656 Look no further for your original LOCK NUT with SKU MINS3758656 from Cummins. Our store offers the best price for this essential part, ensuring your outdoor...
    $51.77
    $47.29
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $51.77
    $47.29
    Subtotal:
  • CUMMINS 3596402 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3596402 LOCK NUT Original OEM part

    CUMMINS

    $10.22
    $9.33
    Engineered to guarantee secure assembly under demanding conditions Provides exceptional resistance to vibration and loosening for dependable operation 100% genuine OEM Cummins component crafted to...
    $10.22
    $9.33
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $10.22
    $9.33
    Subtotal:
  • CUMMINS 3590444 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3590444 LOCK NUT Original OEM part

    CUMMINS

    $40.05
    $36.59
    Precision engineered to uphold Cummins' legacy of dependability and strength Robust locking mechanism ensures vibration-resistant security under the toughest operating conditions Crafted from...
    $40.05
    $36.59
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $40.05
    $36.59
    Subtotal:
  • CUMMINS 3524414 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3524414 LOCK NUT Original OEM part

    CUMMINS

    $33.74
    $30.82
    Precision engineered for unwavering reliability Ensures secure assembly and vibration resistance Genuine OEM Cummins component for guaranteed compatibility CUMMINS 3524414 LOCK NUT – Where Strength...
    $33.74
    $30.82
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $33.74
    $30.82
    Subtotal:
  • CUMMINS 3519471 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3519471 LOCK NUT Original OEM part

    CUMMINS

    $25.47
    $23.27
    Precision engineered to keep your Cummins powertrain uncompromised. Robust locking mechanism for enhanced vibration resistance and secure fit. Crafted from premium-grade materials, designed for...
    $25.47
    $23.27
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $25.47
    $23.27
    Subtotal:
  • CUMMINS 3421744 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3421744 LOCK NUT Original OEM part

    CUMMINS

    $33.70
    $30.79
    Precision engineered for unwavering reliability in every application Exceptional durability to maintain engine integrity under intense conditions Authentic Cummins OEM component ensuring perfect...
    $33.70
    $30.79
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $33.70
    $30.79
    Subtotal:
  • CUMMINS 3420700 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3420700 LOCK NUT Original OEM part

    CUMMINS

    $87.84
    $80.24
    Cummins 3420700 - LOCK NUT MINS3420700 Find the perfect fit with the 3420700 - LOCK NUT by Cummins, SKU MINS3420700. Trust us for genuine parts and enjoy the reassurance of quality and compatibility...
    $87.84
    $80.24
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $87.84
    $80.24
    Subtotal:
  • CUMMINS 3376887 - LOCKNUT SPANNER WRENCH - Original OEM part - Image 1
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    CUMMINS 3376887 LOCKNUT SPANNER WRENCH Original OEM part

    CUMMINS

    $730.40
    $667.23
    Designed for precision and durability in every turn Engineered to fit perfectly with Cummins and Onan generator locknuts Manufactured as a genuine OEM part for assured compatibility and...
    $730.40
    $667.23
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $730.40
    $667.23
    Subtotal:
  • CUMMINS 3336571 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3336571 LOCK NUT Original OEM part

    CUMMINS

    $27.25
    $24.89
    Precision-engineered reliability for your Cummins power system Durable lock nut ensuring secure engine assembly and vibration resistance Corrosion-resistant finish for enhanced longevity in...
    $27.25
    $24.89
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $27.25
    $24.89
    Subtotal:
  • CUMMINS 3336566 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3336566 LOCK NUT Original OEM part

    CUMMINS

    $8.28
    $7.57
    Precision-engineered durability for demanding power systems Secure fastening to maintain engine integrity under heavy load 100% Genuine Cummins OEM component ensuring perfect fit and function Lock...
    $8.28
    $7.57
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $8.28
    $7.57
    Subtotal:
  • CUMMINS 3285627 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3285627 LOCK NUT Original OEM part

    CUMMINS

    $12.17
    $11.12
    Precision engineered for unwavering reliability Robust locking mechanism designed to maintain secure assembly under extreme conditions Manufactured exclusively as an authentic Cummins OEM component,...
    $12.17
    $11.12
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $12.17
    $11.12
    Subtotal:
  • CUMMINS 3279850 - TAPPET TOP STOP LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3279850 TAPPET TOP STOP LOCK NUT Original OEM part

    CUMMINS

    $119.83
    $109.46
    Precision engineered to maintain valve train stability for optimum engine efficiency. Robust construction designed to withstand high-pressure operational stresses. Certified original equipment...
    $119.83
    $109.46
    Add to Cart
    Qty in Cart: 0
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    Price:
    $119.83
    $109.46
    Subtotal:
  • CUMMINS 3202206 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3202206 LOCK NUT Original OEM part

    CUMMINS

    $108.78
    $99.37
    Cummins 3202206 - LOCK NUT MINS3202206 Discover the top-of-the-line 3202206 - LOCK NUT from Cummins at our store offering original replacement parts for outdoor equipment. Find the best price for...
    $108.78
    $99.37
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $108.78
    $99.37
    Subtotal:
  • CUMMINS 3175239 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3175239 LOCK NUT Original OEM part

    CUMMINS

    $5.42
    $4.95
    Engineered precision to uphold Cummins’ legacy of dependability Robust locking mechanism ensures secure fastening under extreme conditions Manufactured as an OEM genuine part to guarantee...
    $5.42
    $4.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $5.42
    $4.95
    Subtotal:
  • CUMMINS 3171137 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3171137 LOCK NUT Original OEM part

    CUMMINS

    $350.84
    $320.49
    Engineered for Endurance, Designed for Dependability Precision Fit for Optimal Engine Security Resistant to Vibration and Wear to Safeguard Your Equipment Authentic OEM Quality Direct from Cummins,...
    $350.84
    $320.49
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $350.84
    $320.49
    Subtotal:
  • CUMMINS 3089271 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3089271 LOCK NUT Original OEM part

    CUMMINS

    $11.03
    $10.07
    Precision engineered for steadfast locking performance under demanding conditions Manufactured using high-quality materials to resist wear and vibration 100% genuine OEM part from Cummins...
    $11.03
    $10.07
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $11.03
    $10.07
    Subtotal:
  • CUMMINS 3085869 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3085869 LOCK NUT Original OEM part

    CUMMINS

    $83.36
    $76.15
    Engineered for Excellence: Precision locking mechanism ensures stability under high vibration and load conditions. Durability You Can Trust: Crafted from premium materials to withstand harsh...
    $83.36
    $76.15
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $83.36
    $76.15
    Subtotal:
  • CUMMINS 3078200 - TAPPET TOP STOP LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3078200 TAPPET TOP STOP LOCK NUT Original OEM part

    CUMMINS

    $175.55
    $160.36
    Cummins 3078200 - TAPPET TOP STOP LOCK NUT MINS3078200 When it comes to quality and authenticity, look no further than our store for the original "3078200 - TAPPET TOP STOP LOCK NUT" by Cummins...
    $175.55
    $160.36
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $175.55
    $160.36
    Subtotal:
  • CUMMINS 3074256 - TAPPET TOP STOP LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3074256 TAPPET TOP STOP LOCK NUT Original OEM part

    CUMMINS

    $144.52
    $132.02
    Engineered to safeguard your Cummins engine’s heart. Precision-fit design guarantees perfect compatibility and performance. Enhances valve train stability for long-lasting engine health. 100%...
    $144.52
    $132.02
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $144.52
    $132.02
    Subtotal:
  • CUMMINS 3072991 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3072991 LOCK NUT Original OEM part

    CUMMINS

    $9.56
    $8.73
    Engineered to secure your powertrain with unwavering precision. Durable construction designed to withstand demanding engine vibrations. Certified OEM Cummins component guarantees perfect fit and...
    $9.56
    $8.73
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $9.56
    $8.73
    Subtotal:
  • CUMMINS 3069015 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3069015 LOCK NUT Original OEM part

    CUMMINS

    $12.94
    $11.82
    Engineered for enduring strength and optimum performance in every turn Precision-fit lock nut designed to maintain secure engine assembly under toughest conditions Resists loosening from vibration,...
    $12.94
    $11.82
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $12.94
    $11.82
    Subtotal:
  • CUMMINS 3068860 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3068860 LOCK NUT Original OEM part

    CUMMINS

    $48.89
    $44.66
    Engineered to deliver unwavering security under extreme conditions Precision-designed to maintain optimal engine assembly integrity Manufactured as a genuine OEM component by Cummins for guaranteed...
    $48.89
    $44.66
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $48.89
    $44.66
    Subtotal:
  • CUMMINS 3051461 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3051461 LOCK NUT Original OEM part

    CUMMINS

    $34.89
    $31.88
    Engineered for precision, built to last — safeguard your system with Cummins excellence. Exceptional fastening strength tailored for demanding power generation environments. Corrosion-resistant...
    $34.89
    $31.88
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $34.89
    $31.88
    Subtotal:
  • CUMMINS 3034304 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3034304 LOCK NUT Original OEM part

    CUMMINS

    $128.00
    $116.93
    Precision engineered for unmatched reliability and safety Designed to maintain critical engine integrity under demanding conditions Constructed with high-grade materials ensuring exceptional wear...
    $128.00
    $116.93
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $128.00
    $116.93
    Subtotal:
  • CUMMINS 3004853 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3004853 LOCK NUT Original OEM part

    CUMMINS

    $43.60
    $39.83
    Unyielding strength meets precise engineering for your power equipment. Robust locking mechanism ensures steadfast component security under demanding conditions. Crafted for long-term durability,...
    $43.60
    $39.83
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $43.60
    $39.83
    Subtotal:
  • CUMMINS 3004057 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3004057 LOCK NUT Original OEM part

    CUMMINS

    $83.85
    $76.60
    Precision engineered for enduring strength and secure fastening Robust corrosion resistance ensures reliable operation in demanding environments Maintains engine integrity under heavy vibration and...
    $83.85
    $76.60
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $83.85
    $76.60
    Subtotal:
  • CUMMINS 3001284 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3001284 LOCK NUT Original OEM part

    CUMMINS

    $39.72
    $36.28
    Precision that drives reliability and safety in every turn. Engineered to maintain secure fastening under the toughest operating conditions. Corrosion-resistant finish ensures extended service life...
    $39.72
    $36.28
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $39.72
    $36.28
    Subtotal:
  • CUMMINS 2894635 - BEARING LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 2894635 BEARING LOCK NUT Original OEM part

    CUMMINS

    $187.28
    $171.08
    Cummins 2894635 - BEARING LOCK NUT MINS2894635 Ensure the longevity and efficiency of your outdoor equipment with the original 2894635 - BEARING LOCK NUT by Cummins. Our store proudly offers this...
    $187.28
    $171.08
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $187.28
    $171.08
    Subtotal:
  • CUMMINS 206506 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 206506 LOCK NUT Original OEM part

    CUMMINS

    $145.54
    $132.95
    Engineered for unwavering strength and secure fastening under demanding conditions Precision-crafted lock nut to maintain your Cummins system’s peak performance and safety Ensures long-term...
    $145.54
    $132.95
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $145.54
    $132.95
    Subtotal:
  • CUMMINS 191517 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 191517 LOCK NUT Original OEM part

    CUMMINS

    $24.56
    $22.44
    Precision engineered to secure your engine components flawlessly Designed to withstand high vibration and torque environments with ease Manufactured as an authentic OEM Cummins part for guaranteed...
    $24.56
    $22.44
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $24.56
    $22.44
    Subtotal:
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