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

Lock Nuts

  • Original price $12.72 - Original price $12.72
    Original price
    $12.72
    $12.72 - $12.72
    Current price $12.72

    5/16"-24 18-8 Stainless Steel Fine Thread Type C Lock Nuts (10 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 9/32"Material: Stainless SteelDriver Type: 1/2" WrenchThread Size: 24 (Fine)Hardness: 18-8Style: Type CT...

    View full details
    Original price $12.72 - Original price $12.72
    Original price
    $12.72
    $12.72 - $12.72
    Current price $12.72
  • Original price $9.13 - Original price $9.13
    Original price
    $9.13
    $9.13 - $9.13
    Current price $9.13

    5/16"-24 Zinc Plated Grade 2 Steel Fine Thread Kep Lock Nuts (12 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 17/64"Material: SteelFinish: ZincDriver Type: 1/2" WrenchThread Size: 24 (Fine)Hardness: Grade 2Style: K...

    View full details
    Original price $9.13 - Original price $9.13
    Original price
    $9.13
    $9.13 - $9.13
    Current price $9.13
  • Original price $16.66 - Original price $16.66
    Original price
    $16.66
    $16.66 - $16.66
    Current price $16.66

    5/16"-24 Zinc Grade 8 Nylon Insert Lock Nuts LNS8-108 (50 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 23/64"Material: SteelFinish: Yellow ZincDriver Type: 1/2" WrenchThread Size: 24 (Fine)Hardness: Grade 8S...

    View full details
    Original price $16.66 - Original price $16.66
    Original price
    $16.66
    $16.66 - $16.66
    Current price $16.66
  • Original price $10.59 - Original price $10.59
    Original price
    $10.59
    $10.59 - $10.59
    Current price $10.59

    1/8IP x 9/16" Steel Lock Nuts LNS-203 (15 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 1/8IPDiameter 2: 9/16"Thickness: 1/8"Material: SteelDriver Type: 9/16" WrenchType: Lock NutBox of 15.A lock nut is a nut that resists loo...

    View full details
    Original price $10.59 - Original price $10.59
    Original price
    $10.59
    $10.59 - $10.59
    Current price $10.59
  • Original price $11.84 - Original price $11.84
    Original price
    $11.84
    $11.84 - $11.84
    Current price $11.84

    5/16"-18 Zinc Plated Grade 2 Steel Coarse Thread Lock Nuts LNS-278 (20 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 9/32"Material: SteelFinish: ZincDriver Type: 1/2" WrenchThread Size: 18 (Coarse)Hardness: Grade 2Style: ...

    View full details
    Original price $11.84 - Original price $11.84
    Original price
    $11.84
    $11.84 - $11.84
    Current price $11.84
  • Original price $11.77 - Original price $11.77
    Original price
    $11.77
    $11.77 - $11.77
    Current price $11.77

    5/16"-24 18-8 Stainless Nylon Insert Lock Nuts LNSS-152 (15 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 11/32"Material: Stainless SteelDriver Type: 1/2" WrenchThread Size: 24 (Fine)Hardness: 18-8Style: Waxed ...

    View full details
    Original price $11.77 - Original price $11.77
    Original price
    $11.77
    $11.77 - $11.77
    Current price $11.77
  • Original price $8.97 - Original price $8.97
    Original price
    $8.97
    $8.97 - $8.97
    Current price $8.97

    5/16"-24 Zinc Grade 2 Nylon Insert Lock Nuts LKNUT-092 (10 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 17/64"Material: SteelFinish: ZincDriver Type: 1/2" WrenchThread Size: 24 (Fine)Hardness: Grade 2Style: T...

    View full details
    Original price $8.97 - Original price $8.97
    Original price
    $8.97
    $8.97 - $8.97
    Current price $8.97
  • Original price $15.42 - Original price $15.42
    Original price
    $15.42
    $15.42 - $15.42
    Current price $15.42

    5/16"-18 Chrome Nylon Insert Lock Nuts LNS-275 (10 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 23/64"Material: SteelFinish: ChromeDriver Type: 1/2" WrenchThread Size: 18 (Coarse)Style: Nylon InsertTy...

    View full details
    Original price $15.42 - Original price $15.42
    Original price
    $15.42
    $15.42 - $15.42
    Current price $15.42
  • Original price $15.42 - Original price $15.42
    Original price
    $15.42
    $15.42 - $15.42
    Current price $15.42

    5/16"-24 Chrome Nylon Insert Lock Nuts LNS-290 (10 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 23/64"Material: SteelFinish: ChromeDriver Type: 1/2" WrenchThread Size: 24 (Fine)Style: Nylon InsertType...

    View full details
    Original price $15.42 - Original price $15.42
    Original price
    $15.42
    $15.42 - $15.42
    Current price $15.42
  • Original price $12.42 - Original price $12.42
    Original price
    $12.42
    $12.42 - $12.42
    Current price $12.42

    5/16"-18 Zinc Grade 8 Nylon Insert Lock Nuts (10 pcs.)

    Monster Fastener
    10+ in stock

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

    View full details
    Original price $12.42 - Original price $12.42
    Original price
    $12.42
    $12.42 - $12.42
    Current price $12.42
  • Original price $12.04 - Original price $12.04
    Original price
    $12.04
    $12.04 - $12.04
    Current price $12.04

    5/16"-24 Zinc Grade 2 Nylon Insert Lock Nuts (16 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 23/64"Material: SteelFinish: ZincDriver Type: 1/2" WrenchThread Size: 24 (Fine)Hardness: Grade 2Style: N...

    View full details
    Original price $12.04 - Original price $12.04
    Original price
    $12.04
    $12.04 - $12.04
    Current price $12.04
  • Original price $10.86 - Original price $10.86
    Original price
    $10.86
    $10.86 - $10.86
    Current price $10.86

    5/16"-18 Zinc Plated Grade 2 Steel Coarse Thread Kep Lock Nuts (16 pcs.)

    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
    Original price $10.86 - Original price $10.86
    Original price
    $10.86
    $10.86 - $10.86
    Current price $10.86
  • Original price $12.04 - Original price $12.04
    Original price
    $12.04
    $12.04 - $12.04
    Current price $12.04

    5/16"-24 Zinc Plated Grade 2 Steel Fine Thread Top Lock Nuts (16 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 17/64"Material: SteelFinish: ZincDriver Type: 1/2" WrenchThread Size: 24 (Fine)Hardness: Grade 2Style: T...

    View full details
    Original price $12.04 - Original price $12.04
    Original price
    $12.04
    $12.04 - $12.04
    Current price $12.04
  • Original price $10.71 - Original price $10.71
    Original price
    $10.71
    $10.71 - $10.71
    Current price $10.71

    1/8IP x 9/16" Steel Lock Nuts (12 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 1/8IPDiameter 2: 9/16"Thickness: 1/8"Material: SteelDriver Type: 9/16" WrenchType: Lock NutBox of 12.A lock nut is a nut that resists loo...

    View full details
    Original price $10.71 - Original price $10.71
    Original price
    $10.71
    $10.71 - $10.71
    Current price $10.71
  • Original price $10.43 - Original price $10.43
    Original price
    $10.43
    $10.43 - $10.43
    Current price $10.43

    1/8IP x 1/2" Brass Lock Nuts (10 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 1/8IPDiameter 2: 9/16"Thickness: 1/8"Material: BrassDriver Type: 1/2" WrenchType: Lock NutBox of 10.A lock nut is a nut that resists loos...

    View full details
    Original price $10.43 - Original price $10.43
    Original price
    $10.43
    $10.43 - $10.43
    Current price $10.43
  • Original price $17.39 - Original price $17.39
    Original price
    $17.39
    $17.39 - $17.39
    Current price $17.39

    5/16"-18 Chrome Plated Steel Coarse Thread Nylon Insert Lock Nuts (10 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 23/64"Material: SteelFinish: ChromeDriver Type: 1/2" WrenchThread Size: 18 (Coarse)Style: Nylon InsertTy...

    View full details
    Original price $17.39 - Original price $17.39
    Original price
    $17.39
    $17.39 - $17.39
    Current price $17.39
  • Original price $17.39 - Original price $17.39
    Original price
    $17.39
    $17.39 - $17.39
    Current price $17.39

    5/16"-24 Chrome Plated Steel Fine Thread Nylon Insert Lock Nuts (10 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 23/64"Material: SteelFinish: ChromeDriver Type: 1/2" WrenchThread Size: 24 (Fine)Style: Nylon InsertType...

    View full details
    Original price $17.39 - Original price $17.39
    Original price
    $17.39
    $17.39 - $17.39
    Current price $17.39
  • Original price $12.27 - Original price $12.27
    Original price
    $12.27
    $12.27 - $12.27
    Current price $12.27

    5/16"-24 18-8 Stainless Steel Fine Thread Nylon Insert Lock Nuts (12 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 11/32"Material: Stainless SteelDriver Type: 1/2" WrenchThread Size: 24 (Fine)Hardness: 18-8Style: Waxed ...

    View full details
    Original price $12.27 - Original price $12.27
    Original price
    $12.27
    $12.27 - $12.27
    Current price $12.27
  • Original price $11.40 - Original price $11.40
    Original price
    $11.40
    $11.40 - $11.40
    Current price $11.40

    5/16"-18 316 Stainless Steel Coarse Thread Lock Nuts (15 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Material: Stainless SteelDriver Type: 1/2" WrenchThread Size: 18 (Coarse)Hardness: 316Type: Lock NutBox of 15.A loc...

    View full details
    Original price $11.40 - Original price $11.40
    Original price
    $11.40
    $11.40 - $11.40
    Current price $11.40
  • Original price $12.40 - Original price $16.64
    Original price
    $12.40 - $16.64
    $12.40 - $16.64
    Current price $12.40

    5/16"-24 Zinc Plated Grade 8 Steel Fine Thread Nylon Insert Lock Nuts

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 23/64"Material: SteelFinish: Yellow ZincDriver Type: 1/2" WrenchThread Size: 24 (Fine)Hardness: Grade 8S...

    View full details
    Original price $12.40 - Original price $16.64
    Original price
    $12.40 - $16.64
    $12.40 - $16.64
    Current price $12.40
  • Original price $9.81 - Original price $12.19
    Original price
    $9.81 - $12.19
    $9.81 - $12.19
    Current price $9.81

    5/16"-18 Zinc Plated Grade 2 Steel Coarse Thread Nylon Insert Lock Nuts LNS-284

    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
    Original price $9.81 - Original price $12.19
    Original price
    $9.81 - $12.19
    $9.81 - $12.19
    Current price $9.81
  • Original price $40.18 - Original price $40.18
    Original price
    $40.18
    $40.18 - $40.18
    Current price $40.18

    5/16"-18 Black Phosphate Grade 2 Lock Nuts LNS-412 (509 pcs.)

    Monster Fastener
    10+ in stock

    Diameter: 5/16"Diameter 2: 9/16"Thickness: 17/64"Material: SteelFinish: Black PhosphateDriver Type: 1/2" WrenchThread Size: 18 (Coarse)Hardness: Gr...

    View full details
    Original price $40.18 - Original price $40.18
    Original price
    $40.18
    $40.18 - $40.18
    Current price $40.18