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Castle Nut

Whether you're a seasoned professional or taking on your first DIY project, having the right parts and tools is critical to your success. Construction Fasteners & Tools carries a complete selection of castle nuts and other fastening components to ensure you're able to find a solution suited to your applications. We partner with customers across Canada to deliver the quality, selection and value you're looking for along with customer service dedicated to your complete satisfaction.

29 Items

Set Descending Direction

Top products

  1. 2" Castle Nut Grade 2 Bare UNC
    2" Castle Nut Grade 2 Bare UNC
    CFT-Approved 2" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB032NC
    CAD $29.99
    / Each
    In stock
    CFT-Approved 2" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB032NC
    CAD $29.99
    / Each
    In stock
  2. 2" Castle Nut Grade 2 Bare UNF
    2" Castle Nut Grade 2 Bare UNF
    CFT-Approved 2" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB032NF
    CAD $31.99
    / Each
    In stock
    CFT-Approved 2" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB032NF
    CAD $31.99
    / Each
    In stock
  3. 5/8" Castle Nut Grade 2 Bare UNF
    5/8" Castle Nut Grade 2 Bare UNF
    CFT-Approved 5/8" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB010NF
    CAD $1.69
    / Each
    In stock
    CFT-Approved 5/8" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB010NF
    CAD $1.69
    / Each
    In stock
  4. 3/4" Castle Nut Grade 2 Bare UNF
    3/4" Castle Nut Grade 2 Bare UNF
    CFT-Approved 3/4" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB012NF
    CAD $2.29
    / Each
    In stock
    CFT-Approved 3/4" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB012NF
    CAD $2.29
    / Each
    In stock
  5. 1-1/4" Castle Nut Grade 2 Bare UNC
    1-1/4" Castle Nut Grade 2 Bare UNC
    CFT-Approved 1-1/4" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB020NC
    CAD $8.99
    / Each
    In stock
    CFT-Approved 1-1/4" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB020NC
    CAD $8.99
    / Each
    In stock
  6. 5/8" Castle Nut Grade 2 Bare UNC
    5/8" Castle Nut Grade 2 Bare UNC
    CFT-Approved 5/8" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB010NC
    CAD $1.69
    / Each
    In stock
    CFT-Approved 5/8" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB010NC
    CAD $1.69
    / Each
    In stock
  7. 1/2" Castle Nut Grade 2 Bare UNF
    1/2" Castle Nut Grade 2 Bare UNF
    CFT-Approved 1/2" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB008NF
    CAD $1.00
    / Each
    In stock
    CFT-Approved 1/2" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB008NF
    CAD $1.00
    / Each
    In stock
  8. 3/8" Castle Nut Grade 2 Bare UNF
    3/8" Castle Nut Grade 2 Bare UNF
    CFT-Approved 3/8" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB006NF
    CAD $0.69
    / Each
    In stock
    CFT-Approved 3/8" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB006NF
    CAD $0.69
    / Each
    In stock
  9. 1-1/2" Castle Nut Grade 2 Bare UNC
    1-1/2" Castle Nut Grade 2 Bare UNC
    CFT-Approved 1-1/2" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB024NC
    CAD $7.99
    / Each
    In stock
    CFT-Approved 1-1/2" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB024NC
    CAD $7.99
    / Each
    In stock
  10. 1-3/8" Castle Nut Grade 2 Bare UNF
    1-3/8" Castle Nut Grade 2 Bare UNF
    CFT-Approved 1-3/8" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB022NF
    CAD $7.99
    / Each
    In stock
    CFT-Approved 1-3/8" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB022NF
    CAD $7.99
    / Each
    In stock
  11. 7/8" Castle Nut Grade 2 Bare UNC
    7/8" Castle Nut Grade 2 Bare UNC
    CFT-Approved 7/8" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB014NC
    CAD $3.89
    / Each
    In stock
    CFT-Approved 7/8" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB014NC
    CAD $3.89
    / Each
    In stock
  12. 3/4" Castle Nut Grade 2 Bare UNC
    3/4" Castle Nut Grade 2 Bare UNC
    CFT-Approved 3/4" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB012NC
    CAD $2.19
    / Each
    In stock
    CFT-Approved 3/4" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB012NC
    CAD $2.19
    / Each
    In stock
  13. 9/16" Castle Nut Grade 2 Bare UNF
    9/16" Castle Nut Grade 2 Bare UNF
    CFT-Approved 9/16" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB009NF
    CAD $2.09
    / Each
    In stock
    CFT-Approved 9/16" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB009NF
    CAD $2.09
    / Each
    In stock
  14. 9/16" Castle Nut Grade 2 Bare UNC
    9/16" Castle Nut Grade 2 Bare UNC
    CFT-Approved 9/16" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB009NC
    CAD $1.90
    / Each
    In stock
    CFT-Approved 9/16" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB009NC
    CAD $1.90
    / Each
    In stock
  15. 1/2" Castle Nut Grade 2 Bare UNC
    1/2" Castle Nut Grade 2 Bare UNC
    CFT-Approved 1/2" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB008NC
    CAD $0.99
    / Each
    In stock
    CFT-Approved 1/2" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB008NC
    CAD $0.99
    / Each
    In stock
  16. 7/16" Castle Nut Grade 2 Bare UNF
    7/16" Castle Nut Grade 2 Bare UNF
    CFT-Approved 7/16" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB007NF
    CAD $0.89
    / Each
    In stock
    CFT-Approved 7/16" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB007NF
    CAD $0.89
    / Each
    In stock
  17. 5/16" Castle Nut Grade 2 Bare UNF
    5/16" Castle Nut Grade 2 Bare UNF
    CFT-Approved 5/16" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB005NF
    CAD $0.69
    / Each
    In stock
    CFT-Approved 5/16" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB005NF
    CAD $0.69
    / Each
    In stock
  18. 1" Castle Nut, Gr2 Yellow Zinc, UNC
    1" Castle Nut, Gr2 Yellow Zinc, UNC
    CFT-Approved 1" Castle Nut, Gr2 Yellow Zinc, UNC
    CF Product Code: CNZ016NC
    CAD $17.99
    / Each
    In stock
    CFT-Approved 1" Castle Nut, Gr2 Yellow Zinc, UNC
    CF Product Code: CNZ016NC
    CAD $17.99
    / Each
    In stock
  19. 1-3/4" Castle Nut Grade 2 Plated UNF
    1-3/4" Castle Nut Grade 2 Plated UNF
    CFT-Approved 1-3/4" Castle Nut, Grade 2 Plated, UNF
    CF Product Code: CNZ028NF
    CAD $12.99
    / Each
    In stock
    CFT-Approved 1-3/4" Castle Nut, Grade 2 Plated, UNF
    CF Product Code: CNZ028NF
    CAD $12.99
    / Each
    In stock
  20. 1-1/8" Castle Nut Grade 2 Bare UNC
    1-1/8" Castle Nut Grade 2 Bare UNC
    CFT-Approved 1-1/8" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB018NC
    CAD $8.99
    / Each
    In stock
    CFT-Approved 1-1/8" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB018NC
    CAD $8.99
    / Each
    In stock
  21. 1" Castle Nut Grade 2 Bare UNF
    1" Castle Nut Grade 2 Bare UNF
    CFT-Approved 1" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB016NF
    CAD $4.19
    / Each
    In stock
    CFT-Approved 1" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB016NF
    CAD $4.19
    / Each
    In stock
  22. 7/8" Castle Nut Grade 2 Bare UNF
    7/8" Castle Nut Grade 2 Bare UNF
    CFT-Approved 7/8" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB014NF
    CAD $4.29
    / Each
    In stock
    CFT-Approved 7/8" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB014NF
    CAD $4.29
    / Each
    In stock
  23. 7/16" Castle Nut Grade 2 Bare UNC
    7/16" Castle Nut Grade 2 Bare UNC
    CFT-Approved 7/16" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB007NC
    CAD $0.79
    / Each
    In stock
    CFT-Approved 7/16" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB007NC
    CAD $0.79
    / Each
    In stock
  24. 5/16" Castle Nut Grade 2 Bare UNC
    5/16" Castle Nut Grade 2 Bare UNC
    CFT-Approved 5/16" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB005NC
    CAD $0.69
    / Each
    In stock
    CFT-Approved 5/16" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB005NC
    CAD $0.69
    / Each
    In stock
  25. 1/4" Castle Nut Grade 2 Bare UNF
    1/4" Castle Nut Grade 2 Bare UNF
    CFT-Approved 1/4" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB004NF
    CAD $0.59
    / Each
    In stock
    CFT-Approved 1/4" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB004NF
    CAD $0.59
    / Each
    In stock
  26. 1/4" Castle Nut Grade 2 Bare UNC
    1/4" Castle Nut Grade 2 Bare UNC
    CFT-Approved 1/4" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB004NC
    CAD $0.59
    / Each
    In stock
    CFT-Approved 1/4" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB004NC
    CAD $0.59
    / Each
    In stock
  27. 1" Castle Nut Grade 2 Bare UNC
    1" Castle Nut Grade 2 Bare UNC
    CFT-Approved 1" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB016NC
    CAD $6.99
    / Each
    Out of stock
    CFT-Approved 1" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB016NC
    CAD $6.99
    / Each
    Out of stock
  28. 1-1/4" Castle Nut Grade 2 Bare UNF
    1-1/4" Castle Nut Grade 2 Bare UNF
    CFT-Approved 1-1/4" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB020NF
    CAD $9.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
    CFT-Approved 1-1/4" Castle Nut, Grade 2 Bare, UNF
    CF Product Code: CNB020NF
    CAD $9.99
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
  29. 3/8" Castle Nut Grade 2 Bare UNC
    3/8" Castle Nut Grade 2 Bare UNC
    CFT-Approved 3/8" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB006NC
    CAD $0.59
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.
    CFT-Approved 3/8" Castle Nut, Grade 2 Bare, UNC
    CF Product Code: CNB006NC
    CAD $0.59
    / Each
    Special Order
    Not Stocked. We will contact you with an ETA after an order is placed.

29 Items

Set Descending Direction

Castle Nuts From Construction Fasteners & Tools

What are castle nuts? Castellated nuts, also known as castle nuts, are a fastening component with a unique design featuring notches cut into the top end that look like the parapets of an old-fashioned castle. Essentially a locking device, the castle nut works with a cotter pin that threads through the slots of a hole drilled into the screw. This unique design secures the part in place, preventing movement or turning and loosening.

Castle nuts are an ideal choice for fastening parts where there is a high level of vibration. The most common uses of castle nuts are in automotive manufacturing and repair such as in securing a wheel hub and other low-torque applications. They are also essential interchangeable with slotted nuts, so in many cases, you can use them in similar instances.

Construction Fasteners & Tools is a go-to source to buy zinc and steel castle nuts and other fasteners online throughout Canada. We also offer hundreds of different models of contractor-approved lag screws with options in diameters, pitch type and plating. Our bolts inventory includes capscrews, socket head, square head, carriage, flange, structural and tap bolts.

If you don't see the screws, nuts or bolts you're looking for, let us know. Our knowledgeable team will be happy to track down a solution that meets your exact requirements.

Shop Fasteners Online Today at CF-T.com

When you're looking for a reliable source of fasteners for joining objects together mechanically, Construction Fasteners & Tools is the one-stop shop for everything on your list. We're experts in helping you choose the right fasteners for your particular projects and will get them to you quickly and at an affordable price. We offer free shipping on orders over $99trouble-free returns within 30 days and so much more.

As a comprehensive source for fasteners online, we provide quality hardware for virtually any construction or joining application. From screws and nuts to washers and bolts, you'll find nearly endless options in all of our product categories. We also carry anchors and studs ranging from common nails to U-bolts and all-in-one bolt kits.

Whether you're looking for more information on castle nuts and how to use them or a reliable source to buy castle nuts in Canada, we've got you covered. Contact us online with any questions you have for our team or to request assistance in placing your order.