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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  • ONAN A063K705 - LOCK NUT ONAN Genuine OEM Part - Original OEM part - Image 1
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    ONAN A063K705 LOCK NUT ONAN Genuine OEM Part

    ONAN

    $3.89
    $3.56
    ONAN A063K705 LOCK NUT is a durable metal fastening component, supplied as a genuine OEM part. This lock nut securely fastens critical assemblies, preventing loosening under vibration and stress...
    $3.89
    $3.56
    Add to Cart
    Qty in Cart: 0
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    $3.89
    $3.56
    Subtotal:
  • CUMMINS 142176 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 142176 LOCK NUT Original OEM part

    CUMMINS

    $63.22
    $57.75
    Engineered for unmatched strength and precision to safeguard your equipment. Designed to resist loosening under extreme vibrations and heavy loads. Manufactured exclusively by Cummins for guaranteed...
    $63.22
    $57.75
    Add to Cart
    Qty in Cart: 0
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    Price:
    $63.22
    $57.75
    Subtotal:
  • ONAN 870-0257 - 8700257 SELF LOOK NUT Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 8700257 SELF LOOK NUT Original ONAN/CUMMINS OEM part

    ONAN

    $12.84
    $11.73
    Cummins SELF LOOK NUT 870-0257 Find the genuine SELF LOCK NUT, SKU 870-0257, crafted by Cummins at our store. Ensure durability and quality with this original replacement part from a trusted brand...
    $12.84
    $11.73
    Add to Cart
    Qty in Cart: 0
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    Price:
    $12.84
    $11.73
    Subtotal:
  • CUMMINS S222-A - S222A LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS S222A LOCK NUT Original OEM part

    CUMMINS

    $28.84
    $26.34
    Cummins S222-A - LOCK NUT MINSS222-A Make maintenance hassle-free with the Cummins S222-A - LOCK NUT. Our store offers this original replacement part at the best price. Crafted for durability and...
    $28.84
    $26.34
    Add to Cart
    Qty in Cart: 0
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    Price:
    $28.84
    $26.34
    Subtotal:
  • CUMMINS 129069 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 129069 LOCK NUT Original OEM part

    CUMMINS

    $17.72
    $16.18
    Engineered for strength and security: the CUMMINS 129069 LOCK NUT ensures a steadfast hold under demanding conditions. Precision fit for seamless compatibility with Cummins power systems to maintain...
    $17.72
    $16.18
    Add to Cart
    Qty in Cart: 0
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    Price:
    $17.72
    $16.18
    Subtotal:
  • CUMMINS 4985492 - LOCK NUT Original OEM part PACK OF 4 - Original OEM part - Image 1
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    CUMMINS 4985492 LOCK NUT Original OEM part PACK OF 4

    CUMMINS

    $74.87
    $68.40
    Cummins 4985492 - LOCK NUT MINS4985492 Discover the authenticity of the "4985492 - LOCK NUT" by Cummins with SKU "MINS4985492" in our online store. Our commitment to delivering genuine replacement...
    $74.87
    $68.40
    Add to Cart
    Qty in Cart: 0
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    Price:
    $74.87
    $68.40
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  • CUMMINS 4946714 - LOCK NUT Original OEM part PACK OF 6 - Original OEM part - Image 1
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    CUMMINS 4946714 LOCK NUT Original OEM part PACK OF 6

    CUMMINS

    $24.00
    $21.93
    Built for Precision, Engineered to Last Ensures Secure Fastening Under High Vibration Conditions Manufactured to Meet Rigorous Cummins Quality Standards Certified as a Genuine OEM component for...
    $24.00
    $21.93
    Add to Cart
    Qty in Cart: 0
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    Price:
    $24.00
    $21.93
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  • CUMMINS 4001248 - LOCK NUT Original OEM part PACK OF 3 - Original OEM part - Image 1
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    CUMMINS 4001248 LOCK NUT Original OEM part PACK OF 3

    CUMMINS

    $34.38
    $31.41
    Precision-engineered security for enduring performance Exceptional resistance to vibration and loosening under harsh conditions Manufactured as an OEM Cummins part to guarantee perfect...
    $34.38
    $31.41
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $34.38
    $31.41
    Subtotal:
  • CUMMINS 4000847 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 4000847 LOCK NUT Original OEM part

    CUMMINS

    $77.62
    $70.90
    Precision-engineered fastening solution for uncompromising performance Ensures secure assembly under demanding vibration and load conditions Original equipment manufacturer (OEM) part directly from...
    $77.62
    $70.90
    Add to Cart
    Qty in Cart: 0
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    Price:
    $77.62
    $70.90
    Subtotal:
  • CUMMINS 3910959 - LOCK NUT Original OEM part PACK OF 2 - Original OEM part - Image 1
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    CUMMINS 3910959 LOCK NUT Original OEM part PACK OF 2

    CUMMINS

    $9.17
    $8.38
    Precision-engineered for steadfast security Durable construction ensuring long-lasting performance Designed specifically for Cummins engines to guarantee perfect compatibility 100% genuine OEM...
    $9.17
    $8.38
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $9.17
    $8.38
    Subtotal:
  • CUMMINS 3645029 - LOCK NUT Original OEM part PACK OF 8 - Original OEM part - Image 1
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    CUMMINS 3645029 LOCK NUT Original OEM part PACK OF 8

    CUMMINS

    $111.84
    $102.16
    Precision engineered for uncompromising durability and fit. Essential for maintaining engine integrity and safety under demanding conditions. Crafted from high-grade materials to resist wear,...
    $111.84
    $102.16
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $111.84
    $102.16
    Subtotal:
  • CUMMINS 3519535 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3519535 LOCK NUT Original OEM part

    CUMMINS

    $34.90
    $31.89
    Cummins 3519535 - LOCK NUT MINS3519535 Unlock the potential of your outdoor equipment with the genuine Cummins 3519535 - LOCK NUT. Don't settle for anything less than original parts to ensure...
    $34.90
    $31.89
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $34.90
    $31.89
    Subtotal:
  • CUMMINS 3068686 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 3068686 LOCK NUT Original OEM part

    CUMMINS

    $47.18
    $43.10
    Engineered for reliable power and precision fastening in every critical application Corrosion-resistant design ensures extended service life and maintenance intervals Perfect OEM fit guarantees...
    $47.18
    $43.10
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $47.18
    $43.10
    Subtotal:
  • CUMMINS 3016182 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 3016182 LOCK NUT Original OEM part

    CUMMINS

    $121.73
    $111.20
    Dependable fastening for uncompromised power Precision-engineered to maintain optimum engine integrity Enhances system stability by preventing loosening under high vibration 100% genuine OEM Cummins...
    $121.73
    $111.20
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $121.73
    $111.20
    Subtotal:
  • CUMMINS 3002126 - LOCK NUT Original OEM part PACK OF 4 - Original OEM part - Image 1
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    CUMMINS 3002126 LOCK NUT Original OEM part PACK OF 4

    CUMMINS

    $126.45
    $115.51
    Depend on precision-engineered reliability to keep your Cummins system secure Designed to maintain optimal torque and prevent loosening under heavy vibration Fabricated from premium materials to...
    $126.45
    $115.51
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $126.45
    $115.51
    Subtotal:
  • CUMMINS 109558 - LOCK NUT - Original OEM part - Image 1
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    CUMMINS 109558 LOCK NUT Original OEM part

    CUMMINS

    $42.74
    $39.04
    Reliability forged by Cummins engineering excellence Precision-fit lock nut designed to secure critical assemblies Engineered for endurance under extreme vibration and load Certified genuine OEM...
    $42.74
    $39.04
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $42.74
    $39.04
    Subtotal:
  • CUMMINS 107534 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 107534 LOCK NUT Original OEM part

    CUMMINS

    $7.13
    $6.51
    Power integrity starts with trusted components. Precision-engineered locking mechanism for secure, vibration-resistant fastening. Corrosion-resistant finish designed for long-lasting durability in...
    $7.13
    $6.51
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $7.13
    $6.51
    Subtotal:
  • CUMMINS S244 - BEARING LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS S244 BEARING LOCK NUT Original OEM part

    CUMMINS

    $286.58
    $261.79
    Cummins S244 - BEARING LOCK NUT MINSS244 Find the authentic Cummins S244 - BEARING LOCK NUT at our store with SKU MINSS244. This high-quality part is crucial for your outdoor equipment maintenance...
    $286.58
    $261.79
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $286.58
    $261.79
    Subtotal:
  • CUMMINS S230-A - S230A LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS S230A LOCK NUT Original OEM part

    CUMMINS

    $37.42
    $34.18
    Cummins S230-A - LOCK NUT MINSS230-A When it comes to finding original replacement parts like the S230-A - LOCK NUT with the MINSS230-A SKU from trusted brands like Cummins, our store is your go-to...
    $37.42
    $34.18
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $37.42
    $34.18
    Subtotal:
  • ONAN A041P045 - LOCK NUT Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
    Add to Cart

    ONAN A041P045 LOCK NUT Original ONAN/CUMMINS OEM part

    ONAN

    $1.60
    $1.47
    Cummins LOCK NUT A041P045 Find peace of mind by choosing the original "LOCK NUT" with SKU "A041P045" from the renowned brand Cummins. Our store stands out as the top choice for high-quality...
    $1.60
    $1.47
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $1.60
    $1.47
    Subtotal:
  • ONAN A034P232 - LOCK NUT Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
    Add to Cart

    ONAN A034P232 LOCK NUT Original ONAN/CUMMINS OEM part

    ONAN

    $91.93
    $83.98
    Cummins LOCK NUT A034P232 Find the perfect replacement part for your outdoor equipment with the original "LOCK NUT" by Cummins, SKU A034P232, ensuring top-notch performance and durability. Trust our...
    $91.93
    $83.98
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $91.93
    $83.98
    Subtotal:
  • ONAN 870-0490 - 8700490 HEX LOOK NUT Original ONAN/CUMMINS OEM part - Original OEM part - Image 1
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    ONAN 8700490 HEX LOOK NUT Original ONAN/CUMMINS OEM part

    ONAN

    $9.15
    $8.36
    Engineered to Perfection: Rely on the precision-crafted ONAN 870-0490 HEX LOOK NUT for a secure and lasting hold. Durability that Endures: Made with premium materials to withstand demanding...
    $9.15
    $8.36
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $9.15
    $8.36
    Subtotal:
  • CUMMINS 70897 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 70897 LOCK NUT Original OEM part

    CUMMINS

    $29.15
    $26.63
    Unwavering Reliability with Every Turn Precision-engineered for secure fastening and long-term durability Ensures optimal engine performance by preventing loosening under vibration Certified genuine...
    $29.15
    $26.63
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $29.15
    $26.63
    Subtotal:
  • CUMMINS 70168 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 70168 LOCK NUT Original OEM part

    CUMMINS

    $16.16
    $14.76
    Precision engineered for seamless engine integrity and enduring strength Designed to provide secure fastening under demanding conditions Corrosion-resistant finish for long-lasting protection 100%...
    $16.16
    $14.76
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $16.16
    $14.76
    Subtotal:
  • CUMMINS 67536 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 67536 LOCK NUT Original OEM part

    CUMMINS

    $291.86
    $266.62
    Precision fastening engineered for enduring reliability Durable construction to maintain engine safety and performance Essential component for maintaining Cummins equipment warranty and...
    $291.86
    $266.62
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $291.86
    $266.62
    Subtotal:
  • CUMMINS 555273 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 555273 LOCK NUT Original OEM part

    CUMMINS

    $17.28
    $15.79
    Precision-engineered for unbeatable hold strength Resists loosening under intense vibration and torque conditions Certified OEM quality for seamless compatibility with your Cummins system CUMMINS...
    $17.28
    $15.79
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $17.28
    $15.79
    Subtotal:
  • CUMMINS 5478960 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 5478960 LOCK NUT Original OEM part

    CUMMINS

    $15.07
    $13.77
    Precision-engineered for robust engine assembly ensuring unwavering stability Constructed from premium materials to withstand extreme operational stresses Guaranteed Genuine OEM part from Cummins...
    $15.07
    $13.77
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $15.07
    $13.77
    Subtotal:
  • CUMMINS 5419189 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 5419189 LOCK NUT Original OEM part

    CUMMINS

    $6.99
    $6.39
    Engineered to uphold the uncompromising strength of Cummins power systems Precision-designed lock nut to maintain secure connections under high vibration and stress Manufactured as an authentic OEM...
    $6.99
    $6.39
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $6.99
    $6.39
    Subtotal:
  • CUMMINS 5367841 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 5367841 LOCK NUT Original OEM part

    CUMMINS

    $15.50
    $14.16
    Engineered to hold fast under intense vibration and heavy loads Precision-crafted for seamless compatibility with Cummins engines OEM quality assuring safety, durability, and warranty...
    $15.50
    $14.16
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $15.50
    $14.16
    Subtotal:
  • CUMMINS 5312111 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 5312111 LOCK NUT Original OEM part

    CUMMINS

    $28.86
    $26.36
    Precision fastening for uncompromised engine stability Engineered to endure demanding operating conditions seamlessly Genuine OEM component crafted by Cummins for guaranteed fit and function Lock...
    $28.86
    $26.36
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $28.86
    $26.36
    Subtotal:
  • CUMMINS 5307613 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 5307613 LOCK NUT Original OEM part

    CUMMINS

    $18.32
    $16.73
    Engineered for precision and durability in demanding conditions Ensures secure fastening to maintain engine integrity Genuine Cummins OEM component for guaranteed compatibility and trust CUMMINS...
    $18.32
    $16.73
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $18.32
    $16.73
    Subtotal:
  • CUMMINS 4982116 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 4982116 LOCK NUT Original OEM part

    CUMMINS

    $16.15
    $14.75
    Precision and dependability engineered for your Cummins power system. High-strength locking mechanism for unmatched vibration resistance. Corrosion-resistant finish extending component life in...
    $16.15
    $14.75
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $16.15
    $14.75
    Subtotal:
  • CUMMINS 4943908 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 4943908 LOCK NUT Original OEM part

    CUMMINS

    $16.40
    $14.99
    Precision engineered to secure your power, ensuring unwavering performance. Robust construction for long-lasting durability under demanding operating conditions. Designed specifically to meet...
    $16.40
    $14.99
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $16.40
    $14.99
    Subtotal:
  • CUMMINS 4380750 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 4380750 LOCK NUT Original OEM part

    CUMMINS

    $97.20
    $88.80
    Unyielding strength for critical engine components Precise engineered fit to guarantee secure fastening Certified OEM Cummins quality for unmatched durability and safety CUMMINS 4380750 LOCK NUT -...
    $97.20
    $88.80
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $97.20
    $88.80
    Subtotal:
  • CUMMINS 4332517 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 4332517 LOCK NUT Original OEM part

    CUMMINS

    $79.84
    $72.93
    Precision-engineered to uphold Cummins’ legacy of durability and trust Designed to ensure secure fastening under high vibration and stress conditions Constructed from premium materials for...
    $79.84
    $72.93
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $79.84
    $72.93
    Subtotal:
  • CUMMINS 4298975 - NUT LOCK - Image 1
    Add to Cart

    CUMMINS 4298975 LOCK NUT Original OEM part

    CUMMINS

    $17.40
    $15.90
    Engineered precision meets steadfast reliability. Robust locking design ensures optimal fastening under demanding conditions. Manufactured as a direct OEM replacement for seamless compatibility...
    $17.40
    $15.90
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $17.40
    $15.90
    Subtotal:
  • CUMMINS 4069886 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 4069886 LOCK NUT Original OEM part

    CUMMINS

    $28.73
    $26.24
    Precision engineered for uncompromised strength and dependability. Ensures optimal fastening integrity under the toughest engine conditions. Manufactured to exact Cummins specifications for seamless...
    $28.73
    $26.24
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $28.73
    $26.24
    Subtotal:
  • CUMMINS 4069885 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 4069885 LOCK NUT Original OEM part

    CUMMINS

    $10.12
    $9.24
    Precision-engineered to maintain secure connections under demanding conditions Manufactured to exact Cummins specifications ensuring optimal compatibility Durable construction that withstands...
    $10.12
    $9.24
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $10.12
    $9.24
    Subtotal:
  • CUMMINS 4007735 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 4007735 LOCK NUT Original OEM part

    CUMMINS

    $112.17
    $102.47
    Precision Engineered for Enduring Strength Robust locking mechanism ensures unwavering vibration resistance Constructed from premium materials for critical engine stability Authentic Cummins OEM...
    $112.17
    $102.47
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $112.17
    $102.47
    Subtotal:
  • CUMMINS 4007603 - LOCK NUT - Original OEM part - Image 1
    Add to Cart

    CUMMINS 4007603 LOCK NUT Original OEM part

    CUMMINS

    $92.52
    $84.51
    Precision fastening engineered for Cummins reliability Designed to maintain optimal engine integrity under demanding conditions Exceptional durability ensuring long-lasting secure assembly Certified...
    $92.52
    $84.51
    Add to Cart
    Qty in Cart: 0
    Quantity:
    Price:
    $92.52
    $84.51
    Subtotal:
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