Nylon Insert Locknuts

  • Conquest 1/4"-20 Grade C NE Nylon Insert Locknut - Plain
    SKU: NENILNC-14-20

    Conquest Grade C NE Nylon Insert Locknut w/Coarse Threads - Plain

    13 Diameters
    • Self-locking fastener featuring a nylon collar that resists loosening under vibration and torque
    • Coarse threads ideal for quick assembly in softer materials
    Diameters:
    5/16" 7/16" 9/16" 1/4" 3/8" 1/2" 5/8" 3/4" 7/8" 1" 1-1/8" 1-1/4" 1-1/2"
    STARTING AT
    $0.05
  • Conquest 1/4"-28 Grade C NE Nylon Insert Locknut - Plain
    SKU: NENILNC-14-28

    Conquest Grade C NE Nylon Insert Locknut w/Fine Threads - Plain

    13 Diameters
    • Self-locking fastener featuring a nylon collar that resists loosening under vibration and torque
    • Fine threads for precision applications
    Diameters:
    5/16" 7/16" 9/16" 1/4" 3/8" 1/2" 5/8" 3/4" 7/8" 1" 1-1/8" 1-1/4" 1-1/2"
    STARTING AT
    $0.08
  • Conquest 1-3/4"-5 Grade C NU Heavy Nylon Insert Locknut - Plain
    SKU: NUNILNC-134-5

    Conquest Grade C NU Heavy Nylon Insert Locknuts - Plain

    4 Diameters
    • designed for large-diameter, coarse-thread bolts, making it ideal for structural and industrial use
    • Grade C classification, built for applications requiring high hardness and load resistance
    Diameters:
    1-3/4" 2" 2-1/4" 2-1/2"
    STARTING AT
    $18.20
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Nylon Insert Locknuts – Grade C Indoor Locking Performance

Nylon Insert Locknuts are designed for reliable, vibration-resistant fastening in non-corrosive, indoor environments. Manufactured to Grade C standards, these locknuts use a nylon collar to create friction against the bolt threads, delivering a secure hold that won’t back off under load — even in high-vibration settings.

Comparable to Nyloc nuts, The nylon insert deforms slightly to grip the threads, providing a reusable and non-damaging locking method.

Applications

These locknuts are ideal for equipment assembly, HVAC systems, indoor machinery, appliances, furniture manufacturing, and other applications where fasteners need to stay secure over time without being permanently locked in place. Not recommended for outdoor or corrosive environments due to their plain finish.

Available Styles

  • NE (Standard) Nylon Insert Locknuts – A versatile choice for general fastening needs.
  • NU (Heavy) Nylon Insert Locknuts – For applications that demand greater strength and resistance to loosening.

Browse the options above to find the size and style that fits your next project.