McMaster-Carr logo
    Filter by
    Specifications Met
    System of Measurement
    Locking Type
    Nut Type
    Industrial Info Compare
    Fastener Strength Grade/Class
    Industrial Info Snippet
    Hex Nut Profile
    Material
    Thread Direction
    Distorted Thread Type
    Thread Spacing
    Industrial Info Compare
    Thread Type
    Fastener Strength Rating
    Drive Style
    Industrial Info Snippet
    DFARS Specialty Metals
    Industrial Info Compare
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Sold As
    Thread Fit
    Industrial Info Snippet
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Comments
    E-mail address (if you would like a response)
    23 Products

    Top-Lock Distorted-Thread Locknuts

    Image of Product. Front orientation. Locknuts. Top-Lock Distorted-Thread Locknuts.
    Irregularly shaped threads at the top of these locknuts grip the screw for a stronger hold than nylon-insert locknuts. Although the threads prevent the nut from backing out due to vibration, they also increase the effort to install and remove. To get these nuts off, you may need special tools, such as an impact wrench or propane torch. Nuts are not reusable.
    Medium-Strength Steel
    These Grade 5 or Class 8 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
    Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.
    Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
    Thread Size
    Wd.,
    mm
    Ht.,
    mm
    Fastener Strength
    Grade/Class
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Yellow-Chromate-Plated Steel
    M36 × 4 mm5536ISO Class 8
    DIN 980V193795A32100000
     
    Zinc-Plated Steel
    M3 × 0.5 mm5.53.7ISO Class 8
    DIN 980V5093795A20000000
    M4 × 0.7 mm74.2ISO Class 8
    DIN 980V10093795A20500000
    M5 × 0.8 mm85.1ISO Class 8
    DIN 980V10093795A21000000
    M6 × 1 mm106ISO Class 8
    DIN 980V10093795A2200000
    M8 × 1.25 mm138ISO Class 8
    DIN 980V5093795A2300000
    M10 × 1.25 mm1710ISO Class 8
    DIN 980V2593795A3330000
    M10 × 1.5 mm1710ISO Class 8
    DIN 980V2593795A2400000
    M12 × 1.25 mm1912ISO Class 8
    DIN 980V2593795A33700000
    M12 × 1.5 mm1912ISO Class 8
    DIN 980V1093795A33400000
    M12 × 1.75 mm1912ISO Class 8
    DIN 980V2593795A25000000
    M14 × 1.5 mm2214ISO Class 8
    DIN 980V1093795A33500000
    M14 × 2 mm2214ISO Class 8
    DIN 980V1093795A25700000
    M16 × 1.5 mm2416ISO Class 8
    DIN 980V593795A33600000
    M16 × 2 mm2416ISO Class 8
    DIN 980V1093795A26000000
    M18 × 1.5 mm2718ISO Class 8
    DIN 980V193795A3380000
    M18 × 2.5 mm2718ISO Class 8
    DIN 980V593795A26500000
    M20 × 1.5 mm3020ISO Class 8
    DIN 980V193795A3390000
    M20 × 2.5 mm3020ISO Class 8
    DIN 980V593795A27000000
    M24 × 1.5 mm3624ISO Class 8
    DIN 980V193795A3430000
    M24 × 3 mm3624ISO Class 8
    DIN 980V193795A2800000
    M27 × 3 mm4127ISO Class 8
    DIN 980V193795A3110000
    M30 × 3.5 mm4630ISO Class 8
    DIN 980V193795A3120000
     
    back to top