Skip to content
Free shipping on orders $250 and up!
Free shipping on orders $250 and up!

Lock Nuts

  • 3/8"-24 Zinc Plated Grade 2 Steel Fine Thread Nylon Insert Lock Nuts
    $11.46 - $15.33
    $11.46 - $15.33
    $11.46 - $15.33
    $11.46

    3/8"-24 Zinc Plated Grade 2 Steel Fine Thread Nylon Insert Lock Nuts LNS-320

    Monster Fastener
    10+ in stock

    Diameter: 3/8"Diameter 2: 21/32"Thickness: 15/32"Material: SteelFinish: ZincDriver Type: 9/16" WrenchThread Size: 24 (Fine)Hardness: Grade 2Style: ...

    View full details
    $11.46 - $15.33
    $11.46 - $15.33
    $11.46 - $15.33
    $11.46
  • 7/16"-20 Zinc Plated Grade 2 Steel Fine Thread Nylon Insert Lock Nuts
    $9.82 - $12.73
    $9.82 - $12.73
    $9.82 - $12.73
    $9.82

    7/16"-20 Zinc Plated Grade 2 Steel Fine Thread Nylon Insert Lock Nuts LNS-344

    Monster Fastener
    10+ in stock

    Diameter: 7/16"Diameter 2: 23/32"Thickness: 15/32"Material: SteelFinish: ZincDriver Type: 11/16" WrenchThread Size: 20 (Fine)Hardness: Grade 2Style...

    View full details
    $9.82 - $12.73
    $9.82 - $12.73
    $9.82 - $12.73
    $9.82
  • 1/2"-20 Zinc Plated Grade 2 Steel Fine Thread Nylon Insert Lock Nuts
    $10.25 - $16.60
    $10.25 - $16.60
    $10.25 - $16.60
    $10.25

    1/2"-20 Zinc Plated Grade 2 Steel Fine Thread Nylon Insert Lock Nuts LNS-359

    Monster Fastener
    10+ in stock

    Diameter: 1/2"Diameter 2: 27/32"Thickness: 39/64"Material: SteelFinish: ZincDriver Type: 3/4" WrenchThread Size: 20 (Fine)Hardness: Grade 2Style: N...

    View full details
    $10.25 - $16.60
    $10.25 - $16.60
    $10.25 - $16.60
    $10.25
  • #4-40 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts
    $8.79 - $11.46
    $8.79 - $11.46
    $8.79 - $11.46
    $8.79

    #4-40 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts LNS-197

    Monster Fastener
    10+ in stock

    Diameter: #4Diameter 2: 9/32"Thickness: 3/32"Material: SteelFinish: ZincDriver Type: 1/4" WrenchThread Size: 40 (Coarse)Hardness: Grade 2Style: Kep...

    View full details
    $8.79 - $11.46
    $8.79 - $11.46
    $8.79 - $11.46
    $8.79
  • #6-32 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts
    $8.99 - $12.40
    $8.99 - $12.40
    $8.99 - $12.40
    $8.99

    #6-32 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts LNS-206

    Monster Fastener
    10+ in stock

    Diameter: #6Diameter 2: 11/32"Thickness: 7/64"Material: SteelFinish: ZincDriver Type: 5/16" WrenchThread Size: 32 (Coarse)Hardness: Grade 2Style: K...

    View full details
    $8.99 - $12.40
    $8.99 - $12.40
    $8.99 - $12.40
    $8.99
  • #8-32 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts
    $9.22 - $12.35
    $9.22 - $12.35
    $9.22 - $12.35
    $9.22

    #8-32 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts LNS-215

    Monster Fastener
    Only 1 left!

    Diameter: #8Diameter 2: 3/8"Thickness: 1/8"Material: SteelFinish: ZincDriver Type: 11/32" WrenchThread Size: 32 (Coarse)Hardness: Grade 2Style: Kep...

    View full details
    $9.22 - $12.35
    $9.22 - $12.35
    $9.22 - $12.35
    $9.22
  • #10-24 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts
    $9.70 - $12.56
    $9.70 - $12.56
    $9.70 - $12.56
    $9.70

    #10-24 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts LNS-224

    Monster Fastener
    10+ in stock

    Diameter: #10Diameter 2: 13/32"Thickness: 1/8"Material: SteelFinish: ZincDriver Type: 3/8" WrenchThread Size: 24 (Coarse)Hardness: Grade 2Style: Ke...

    View full details
    $9.70 - $12.56
    $9.70 - $12.56
    $9.70 - $12.56
    $9.70
  • #10-32 Zinc Plated Grade 2 Steel Fine Thread Kep Lock Nuts
    $9.75 - $12.56
    $9.75 - $12.56
    $9.75 - $12.56
    $9.75

    #10-32 Zinc Plated Grade 2 Steel Fine Thread Kep Lock Nuts LNS-233

    Monster Fastener
    10+ in stock

    Diameter: #10Diameter 2: 13/32"Thickness: 1/8"Material: SteelFinish: ZincDriver Type: 3/8" WrenchThread Size: 32 (Fine)Hardness: Grade 2Style: KepT...

    View full details
    $9.75 - $12.56
    $9.75 - $12.56
    $9.75 - $12.56
    $9.75
  • 1/4"-20 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts
    $10.09 - $14.26
    $10.09 - $14.26
    $10.09 - $14.26
    $10.09

    1/4"-20 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts LNS-254

    Monster Fastener
    10+ in stock

    Diameter: 1/4"Diameter 2: 1/2"Thickness: 3/16"Material: SteelFinish: ZincDriver Type: 7/16" WrenchThread Size: 20 (Coarse)Hardness: Grade 2Style: K...

    View full details
    $10.09 - $14.26
    $10.09 - $14.26
    $10.09 - $14.26
    $10.09
  • 5/16"-18 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts
    $10.56 - $18.12
    $10.56 - $18.12
    $10.56 - $18.12
    $10.56

    5/16"-18 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts LNS-281

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 17/64"Material: SteelFinish: ZincDriver Type: 1/2" WrenchThread Size: 18 (Coarse)Hardness: Grade 2Style:...

    View full details
    $10.56 - $18.12
    $10.56 - $18.12
    $10.56 - $18.12
    $10.56
  • 3/8"-16 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts
    $11.15 - $23.68
    $11.15 - $23.68
    $11.15 - $23.68
    $11.15

    3/8"-16 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts LNS-308

    Monster Fastener
    10+ in stock

    Diameter: 3/8"Diameter 2: 21/32"Thickness: 3/8"Material: SteelFinish: ZincDriver Type: 9/16" WrenchThread Size: 16 (Coarse)Hardness: Grade 2Style: ...

    View full details
    $11.15 - $23.68
    $11.15 - $23.68
    $11.15 - $23.68
    $11.15
  • 1/4"-20 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts
    $9.89 - $12.13
    $9.89 - $12.13
    $9.89 - $12.13
    $9.89

    1/4"-20 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts LNS-260

    Monster Fastener
    10+ in stock

    Diameter: 1/4"Diameter 2: 1/2"Thickness: 7/32"Material: SteelFinish: ZincDriver Type: 7/16" WrenchThread Size: 20 (Coarse)Hardness: Grade 2Style: T...

    View full details
    $9.89 - $12.13
    $9.89 - $12.13
    $9.89 - $12.13
    $9.89
  • 5/16"-18 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts
    $9.81 - $14.17
    $9.81 - $14.17
    $9.81 - $14.17
    $9.81

    5/16"-18 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts LNS-287

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 17/64"Material: SteelFinish: ZincDriver Type: 1/2" WrenchThread Size: 18 (Coarse)Hardness: Grade 2Style:...

    View full details
    $9.81 - $14.17
    $9.81 - $14.17
    $9.81 - $14.17
    $9.81
  • 3/8"-16 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts
    $9.92 - $17.60
    $9.92 - $17.60
    $9.92 - $17.60
    $9.92

    3/8"-16 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts LNS-314

    Monster Fastener
    10+ in stock

    Diameter: 3/8"Diameter 2: 21/32"Thickness: 21/64"Material: SteelFinish: ZincDriver Type: 9/16" WrenchThread Size: 16 (Coarse)Hardness: Grade 2Style...

    View full details
    $9.92 - $17.60
    $9.92 - $17.60
    $9.92 - $17.60
    $9.92
  • 7/16"-14 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts
    $10.22 - $14.62
    $10.22 - $14.62
    $10.22 - $14.62
    $10.22

    7/16"-14 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts LNS-338

    Monster Fastener
    10+ in stock

    Diameter: 7/16"Diameter 2: 23/32"Thickness: 3/8"Material: SteelFinish: ZincDriver Type: 11/16" WrenchThread Size: 14 (Coarse)Hardness: Grade 2Style...

    View full details
    $10.22 - $14.62
    $10.22 - $14.62
    $10.22 - $14.62
    $10.22
  • 1/2"-13 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts
    $11.01 - $18.86
    $11.01 - $18.86
    $11.01 - $18.86
    $11.01

    1/2"-13 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts LNS-356

    Monster Fastener
    10+ in stock

    Diameter: 1/2"Diameter 2: 27/32"Thickness: 29/64"Material: SteelFinish: ZincDriver Type: 3/4" WrenchThread Size: 13 (Coarse)Hardness: Grade 2Style:...

    View full details
    $11.01 - $18.86
    $11.01 - $18.86
    $11.01 - $18.86
    $11.01
  • 5/8"-11 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts
    $10.54 - $20.60
    $10.54 - $20.60
    $10.54 - $20.60
    $10.54

    5/8"-11 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts LNS-374

    Monster Fastener
    10+ in stock

    Diameter: 5/8"Diameter 2: 1-7/32"Thickness: 35/64"Material: SteelFinish: ZincDriver Type: 15/16" WrenchThread Size: 11 (Coarse)Hardness: Grade 2Sty...

    View full details
    $10.54 - $20.60
    $10.54 - $20.60
    $10.54 - $20.60
    $10.54
  • 3/4"-10 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts
    $10.97 - $27.39
    $10.97 - $27.39
    $10.97 - $27.39
    $10.97

    3/4"-10 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts LNS-386

    Monster Fastener
    10+ in stock

    Diameter: 3/4"Diameter 2: 1-7/32"Thickness: 21/32"Material: SteelFinish: ZincDriver Type: 1-1/8" WrenchThread Size: 10 (Coarse)Hardness: Grade 2Sty...

    View full details
    $10.97 - $27.39
    $10.97 - $27.39
    $10.97 - $27.39
    $10.97
  • 7/8"-14 Zinc Plated Grade 2 Steel Fine Thread Nylon Insert Lock Nuts
    $14.28 - $25.56
    $14.28 - $25.56
    $14.28 - $25.56
    $14.28

    7/8"-14 Zinc Plated Grade 2 Steel Fine Thread Nylon Insert Lock Nuts LNS-395

    Monster Fastener
    10+ in stock

    Diameter: 7/8"Diameter 2: 1-7/16"Thickness: 1"Material: SteelFinish: ZincDriver Type: 1-5/16" WrenchThread Size: 14 (Fine)Hardness: Grade 2Style: N...

    View full details
    $14.28 - $25.56
    $14.28 - $25.56
    $14.28 - $25.56
    $14.28
  • #6-32 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts
    $11.05 - $13.26
    $11.05 - $13.26
    $11.05 - $13.26
    $11.05

    #6-32 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts

    Monster Fastener
    10+ in stock

    Diameter: #6Diameter 2: 11/32"Thickness: 3/16"Material: SteelFinish: ZincDriver Type: 5/16" WrenchThread Size: 32 (Coarse)Hardness: Grade 2Style: N...

    View full details
    $11.05 - $13.26
    $11.05 - $13.26
    $11.05 - $13.26
    $11.05
  • #8-32 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts
    $11.05 - $14.16
    $11.05 - $14.16
    $11.05 - $14.16
    $11.05

    #8-32 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts

    Monster Fastener
    10+ in stock

    Diameter: #8Diameter 2: 3/8"Thickness: 15/64"Material: SteelFinish: ZincDriver Type: 11/32" WrenchThread Size: 32 (Coarse)Hardness: Grade 2Style: N...

    View full details
    $11.05 - $14.16
    $11.05 - $14.16
    $11.05 - $14.16
    $11.05
  • #10-24 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts
    $11.05 - $14.51
    $11.05 - $14.51
    $11.05 - $14.51
    $11.05

    #10-24 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts

    Monster Fastener
    10+ in stock

    Diameter: #10Diameter 2: 7/16"Thickness: 15/64"Material: SteelFinish: ZincDriver Type: 3/8" WrenchThread Size: 24 (Coarse)Hardness: Grade 2Style: N...

    View full details
    $11.05 - $14.51
    $11.05 - $14.51
    $11.05 - $14.51
    $11.05
  • 5/16"-18 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts
    $13.31 - $13.31
    $13.31
    $13.31 - $13.31
    $13.31

    5/16"-18 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 23/64"Material: SteelFinish: ZincDriver Type: 1/2" WrenchThread Size: 18 (Coarse)Hardness: Grade 2Style:...

    View full details
    $13.31 - $13.31
    $13.31
    $13.31 - $13.31
    $13.31
  • 3/8"-16 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts
    $11.26 - $12.61
    $11.26 - $12.61
    $11.26 - $12.61
    $11.26

    3/8"-16 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts

    Monster Fastener
    10+ in stock

    Diameter: 3/8"Diameter 2: 21/32"Thickness: 15/32"Material: SteelFinish: ZincDriver Type: 9/16" WrenchThread Size: 16 (Coarse)Hardness: Grade 2Style...

    View full details
    $11.26 - $12.61
    $11.26 - $12.61
    $11.26 - $12.61
    $11.26