Lock Nuts

About Lock Nuts

Lock nuts are specialized fasteners designed to prevent unintentional loosening in vibrating or high-stress environments. Featuring a prevailing torque mechanism, these nuts resist self-loosening by exerting consistent pressure on the threads of a mating bolt. Common types include nylon-insert lock nuts, which have a nylon collar for friction, and metal prevailing torque lock nuts with deformed threads. The design ensures stability and reliability in applications where traditional nuts may succumb to vibrations or dynamic forces. Lock nuts find use in automotive, aerospace, and machinery industries, enhancing the overall safety and durability of threaded connections.

Compare part numbers, manufacturers and available catalog specifications. Open a product for complete details, pricing and availability.

  • 2238

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 1/4 NPT

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    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 2242

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 3/8 NPT

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    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 2243

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts Metric Thread, M6 x 1

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    RoHS Compliant
    Yes
    System of Measurement
    976
    Body Material
    Brass

  • 2244

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts Metric Thread, M8 x 1.25

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    RoHS Compliant
    Yes
    System of Measurement
    976
    Body Material
    Brass

  • 2245

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts Metric Thread, M10 x 1.5

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    RoHS Compliant
    Yes
    System of Measurement
    976
    Body Material
    Brass

  • 2246

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts Metric Thread, M12 x 1.5

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    RoHS Compliant
    Yes
    System of Measurement
    976
    Body Material
    Brass

  • 2247

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts Metric Thread, M16 x 1.5

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Body Material
    Brass

  • 2248

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts Metric Thread, M20 x 1.5

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Body Material
    Brass

  • 2249

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts Metric Thread, M25 x 1.5

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Body Material
    Brass

  • 2250

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 1/2 NPT

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    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 2251

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 3/4 NPT

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    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 2252

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 1 NPT

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    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 2253

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts Metric Thread, M32 x 1.5

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    RoHS Compliant
    Yes
    System of Measurement
    976
    Body Material
    Brass

  • 2254

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts Metric Thread, M40 x 1.5

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    RoHS Compliant
    Yes
    System of Measurement
    976
    Body Material
    Brass

  • 2255

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts Metric Thread, M50 x 1.5

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    RoHS Compliant
    Yes
    System of Measurement
    976
    Body Material
    Brass

  • 2257

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts PGThread, PG 7

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    RoHS Compliant
    Yes
    Body Material
    Brass

  • 2258

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts PGThread, PG 9

    View product details
    RoHS Compliant
    Yes
    Body Material
    Brass

  • 2259

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts PGThread, PG 11

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    RoHS Compliant
    Yes
    Body Material
    Brass

  • 2260

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts PGThread, PG 13.5

    View product details
    RoHS Compliant
    Yes
    Body Material
    Brass

  • 2261

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts PGThread, PG 16

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    RoHS Compliant
    Yes
    Body Material
    Brass

  • 2262

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts PGThread, PG 21

    View product details
    RoHS Compliant
    Yes
    Body Material
    Brass

  • 2263

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts PGThread, PG 29

    View product details
    RoHS Compliant
    Yes
    Body Material
    Brass

  • 2268

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts PGThread, PG 36

    View product details
    RoHS Compliant
    Yes
    Body Material
    Brass

  • 2269

    HEYCO Products

    Heyco® Nickel-Plated Brass Locknuts PGThread, PG 42

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    Body Material
    Brass

  • 3165

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 7

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3166

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 7

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3167

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 9

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3168

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 9

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3169

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 11

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3170

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 11

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3171

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 13.5

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3172

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 13.5

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3173

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 16

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3174

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 16

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3175

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 21

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3176

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 21

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3177

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 29

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3178

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 29

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3269

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1/4 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3270

    HEYCO Products

    NLN 1/4 NPT GRAY 100/CTN

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    Insert Material
    1213

  • 3271

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 3/8 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3272

    HEYCO Products

    NLN 3/8 NPT GRAY 100/CTN

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3273

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1/2 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3274

    HEYCO Products

    NLN 1/2 NPT GRAY 100/CTN

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3275

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 3/4 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3276

    HEYCO Products

    NLN 3/4 NPT GRAY 100/CTN

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    RoHS Compliant
    No
    Insert Material
    1213

  • 3277

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3278

    HEYCO Products

    NLN 1 NPT GRAY 100/CTN

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 3279

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1-1/4 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 4360

    HEYCO Products

    HEYClean® Nickel-Plated Brass Drain Plug Locknuts, Nickel-Plated Brass, M12 x 1.5

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    Thread Size
    M12 x 1.5
    RoHS Compliant
    Yes
    Body Material
    Brass

  • 4361

    HEYCO Products

    HEYClean® Nickel-Plated Brass Drain Plug Locknuts, Nickel-Plated Brass

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    Thread Size
    M16 x 1.5
    RoHS Compliant
    Yes
    Body Material
    Brass

  • 4362

    HEYCO Products

    HEYClean® Nickel-Plated Brass Drain Plug Locknuts, Nickel-Plated Brass, M20 x 1.5

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    Thread Size
    M20 x 1.5
    RoHS Compliant
    Yes
    Body Material
    Brass

  • 8461

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 3/8 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 8462

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 3/8 NPT

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    RoHS Compliant
    No
    Insert Material
    1213

  • 8463

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1/2 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 8464

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1/2 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 8465

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 3/4 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 8466

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 3/4 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 8467

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • 8468

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • 9800

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 1/2 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 9801

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 3/4 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 9802

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 1 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 9803

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 1-1/4 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 9804

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 1-1/2 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 9805

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 2 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 9806

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 1-1/4 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 9807

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 1-1/2 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 9808

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 2 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 9809

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 2-1/2 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    Steel

  • 9810

    HEYCO Products

    Heyco® Stamped Steel and Zinc Die-cast Locknuts NPT Thread, 3 NPT

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    RoHS Compliant
    Yes
    Insert Material
    Steel

  • M9130

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M12

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9131

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M12

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9132

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M16

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9133

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M16

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9134

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M20

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9135

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M20

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9136

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M25

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    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9137

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M25

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9138

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M32

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9139

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M32

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9140

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M40

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9141

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M40

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9142

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1/4 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • M9143

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1/4 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • M9144

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1-1/4 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • M9145

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1-1/4 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • M9146

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 36

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • M9147

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 36

    View product details
    Insert Material
    1213

  • M9148

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M50

    View product details
    RoHS Compliant
    Yes
    System of Measurement
    976
    Insert Material
    1213

  • M9149

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M50

    View product details
    System of Measurement
    976
    Insert Material
    1213

  • M9150

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1-1/2 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • M9151

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 1-1/2 NPT

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    RoHS Compliant
    Yes
    Insert Material
    1213

  • M9152

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 42

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • M9153

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 42

    View product details
    Insert Material
    1213

  • M9154

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M63

    View product details
    System of Measurement
    976
    Insert Material
    1213

  • M9155

    HEYCO Products

    Heyco® Nylon Locknuts, Nylon 6/6, M63

    View product details
    System of Measurement
    976
    Insert Material
    1213

  • M9156

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 2 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • M9157

    HEYCO Products

    Heyco® Nylon Locknuts NPT Thread, Nylon 6/6, 2 NPT

    View product details
    RoHS Compliant
    Yes
    Insert Material
    1213

  • M9158

    HEYCO Products

    Heyco® Nylon Locknuts PG Thread, Nylon 6/6, PG 48

    View product details
    Insert Material
    1213