Nyloc Locking Nuts

Nyloc nuts (type P insert nuts) feature a nylon insert in the top of the nut that grips the bolt thread and prevents loosening under vibration, making them essential in applications where joints are subject to movement or dynamic loads.

Our Grade 8.8 Nyloc nuts are BZP finish in metric sizes M6 to M16. The nylon insert creates resistance as the nut is tightened, and the locking action remains effective even after multiple uses. Ideal for automotive, machinery, structural, and general engineering use.

  • Sizes: M6, M8, M10, M12, M16
  • Grade: 8.8 high tensile
  • Finish: Bright Zinc Plated (BZP)
  • Type P nylon insert for reliable vibration resistance
  • Re-usable locking action

Not sure which finish to choose?

We stock fasteners in three finishes to suit every application. BZP is ideal for indoor and sheltered use. HDG gives heavy-duty protection for outdoor, structural, and timber work. A4 Grade 316 Stainless is the right choice for marine, coastal, and chemical environments. Read our guide to pick the right finish for your project.

Read the finish guide

Same-day dispatch — free delivery over £60

Orders placed before 2pm are dispatched the same working day via tracked courier. Free standard UK delivery on orders over £60. All fasteners are manufactured to DIN and ISO standards in Grade 4.8 and 8.8 steel — competitively priced for trade and domestic buyers, with no minimum order.

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