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Top rated slotted washers

AI-generated summary · updated July 27, 2026 · verify details before purchase.

  1. Best overall

    Hillman 851267 Slotted Hex Nut, 3/8-16, Zinc-Plated, 100-Pack

    4.6/5 $6-$9

    Durable zinc-plated slotted hex nuts with consistent threading. Great value for general-purpose fastening.

    • Solid build quality
    • Good corrosion resistance
    • Affordable bulk pack
    • Not for high-temperature use
  2. Best premium

    Everbilt 800957 Slotted Hex Nut, 1/2-13, Zinc-Plated, 50-Pack

    4.7/5 $7-$10

    High-quality slotted hex nuts with precise slots for castle applications. Trusted brand for industrial use.

    • Precision threading
    • Sturdy material
    • Consistent slot depth
    • Slightly pricier per piece
  3. Best budget pick

    Crown Bolt 43150 Slotted Hex Nut, 5/16-18, Zinc-Plated, 100-Pack

    4.5/5 $5-$8

    Economical slotted nuts for light-duty projects. Good enough for many DIY applications.

    • Very affordable
    • Decent fit
    • Standard finish
    • May have minor burrs
    • Not for heavy loads
  4. Best small pack

    Prime-Line N 6251 Slotted Hex Nut, 1/4-20, Zinc-Plated, 25-Pack

    4.4/5 $4-$6

    Compact pack of slotted hex nuts ideal for small repairs. Easy to store and use.

    • Compact packaging
    • Good for small projects
    • Decent quality
    • Smaller count
    • Not for heavy-duty
  5. Best mid-size

    Hillman 851269 Slotted Hex Nut, 7/16-14, Zinc-Plated, 25-Pack

    4.3/5 $5-$7

    Reliable slotted hex nuts for medium-duty applications. Meets standard dimensional requirements.

    • Good fit
    • Durable plating
    • Consistent quality
    • Limited pack size
    • Average rating
  6. Best large size

    Everbilt 800959 Slotted Hex Nut, 5/8-11, Zinc-Plated, 25-Pack

    4.6/5 $8-$12

    Large slotted hex nuts with robust construction. Suitable for demanding industrial applications.

    • Heavy-duty
    • Precise slots
    • Strong material
    • Higher cost per nut
    • Large storage required
  7. Best value bulk

    Prime-Line N 6252 Slotted Hex Nut, 1/4-20, Zinc-Plated, 100-Pack

    4.3/5 $8-$11

    Economical bulk pack of slotted hex nuts. Good for high-volume projects.

    • Excellent value
    • Large quantity
    • Adequate quality
    • Inconsistent finish on some nuts
  8. Best for light use

    Crown Bolt 43151 Slotted Hex Nut, 5/16-18, Zinc-Plated, 50-Pack

    4.4/5 $4-$6

    Reliable slotted nuts for low-stress applications. Good balance of cost and performance.

    • Low price
    • Suitable for light duty
    • Standard sizing
    • Not for heavy loads
    • Small pack size

Buying advice

When selecting slotted washers (castle nuts), ensure you match the thread size and pitch with your bolt. For safety-critical applications like cotter pins, choose a nut with consistent slot depth and material hardness. Zinc-plated nuts offer basic corrosion resistance; for outdoor use, consider stainless steel. Bulk packs save money if you have many fasteners to secure.

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