Featured Categories

  • Tools & Machining
  • Shipping, Packaging & Office Supplies
  • Plumbing
  • Safety

Shop Categories

  • Abrasives & Polishers
  • Adhesives & Tapes
  • Electrical Supplies
  • Electronics
  • Fasteners
  • Food Service & Restaurant Supplies
  • Furniture, Linens & Decor
  • Grounds & Outdoor
  • Hardware & Building Materials
  • Heating & Cooling
  • Janitorial & Cleaning Supplies
  • Lab Equipment & Supplies
  • Lighting
  • Material Handling
  • Medical & Personal Care
  • Paint, Coatings & Supplies
  • Plumbing
  • Power Transmission
  • Pumps
  • Raw Materials
  • Safety
  • Shipping, Packaging & Office Supplies
  • Storage & Workspace
  • Test Instruments & Gauges
  • Tools & Machining
  • Vehicle Maintenance
  • Welding, Soldering & Brazing
  • About Us
  • Promo Codes
  • Contact Us
Added to Cart
Skip to Main Content
FREE Shipping on orders over $50 after you . Restrictions Apply
Zoro Homepage
Close icon
Clipboard Icon Clipboard Icon Quick Order
Cart Icon
0
Cart Icon
0
Cart
  • Low prices on everyday needs. Shop Zoro Select
  • Don't miss these limited time offers. Shop All Deals
  • Get 30 days to pay with Net 30. Apply Now
  1. Home
  2. /
  3. Fasteners
  4. /
  5. Nuts
  6. /
  7. Castle Nuts
Search Feedback

Castle Nuts (213 items) - Page 5

Zoro Select Castle Nut, Steel, Black Oxide M12000.180.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G0302456
Mfr # M12000.180.0001
product price:  $100.99
/pk 50, $2.02/ea
Zoro Select 1/4"-28 Grade 5 Zinc Plated Finish Steel Round Slotted Castle Nut, 100 pk. 351026G
Zoro Select

1/4"-28 Grade 5 Zinc Plated Finish Steel Round Slotted Castle Nut, 100 pk.

Zoro # G0963024
Mfr # 351026G
product price:  $24.19
/pk 100, $0.24/ea
Zoro Select 9/16"-18 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 25 pk. 371155G
Zoro Select

9/16"-18 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 25 pk.

Zoro # G1461205
Mfr # 371155G
product price:  $18.79
/pk 25, $0.75/ea
Zoro Select Castle Nut, Steel, Black Oxide M12020.220.0150
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G9900777
Mfr # M12020.220.0150
product price:  $40.19
/pk 10, $4.02/ea
Zoro Select 1-1/4"-7 Grade 2 Zinc Plated Finish Low Carbon Steel Round Slotted Castle Nut, 10 pk. SNI21250-010P
Zoro Select

1-1/4"-7 Grade 2 Zinc Plated Finish Low Carbon Steel Round Slotted Castle Nut, 10 pk.

Zoro # G3252575
Mfr # SNI21250-010P
product price:  $32.59
/pk 10, $3.26/ea
Zoro Select 2"-4-1/2 Grade 5 Plain Finish Carbon Steel Round Slotted Castle Nut U12055.200.0001
Zoro Select

2"-4-1/2 Grade 5 Plain Finish Carbon Steel Round Slotted Castle Nut

Zoro # G2520406
Mfr # U12055.200.0001
product price:  $72.69
/ea
Zoro Select Castle Nut, Steel, Black Oxide M12020.180.0150
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G9900768
Mfr # M12020.180.0150
product price:  $97.69
/pk 50, $1.95/ea
Zoro Select 1-1/2"-12 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 5 pk. 371485G
Zoro Select

1-1/2"-12 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 5 pk.

Zoro # G2702113
Mfr # 371485G
product price:  $48.19
/pk 5, $9.64/ea
Zoro Select Castle Nut, Steel, Black Oxide M12000.160.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G0302465
Mfr # M12000.160.0001
product price:  $59.39
/pk 50, $1.19/ea
Zoro Select 1/2"-20 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 50 pk. 351125G
Zoro Select

1/2"-20 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 50 pk.

Zoro # G0885123
Mfr # 351125G
product price:  $10.69
/pk 50, $0.21/ea
Zoro Select Castle Nut, Steel, Black Oxide M12000.080.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G0302508
Mfr # M12000.080.0001
product price:  $71.69
/pk 100, $0.72/ea
Zoro Select Castle Nut, Steel, Black Oxide M12000.420.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G2649711
Mfr # M12000.420.0001
product price:  $40.69
/ea
Zoro Select Castle Nut, Steel, Black Oxide M12000.140.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G0302471
Mfr # M12000.140.0001
product price:  $64.39
/pk 50, $1.29/ea
Zoro Select Castle Nut, Steel, Black Oxide M12000.330.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G1941366
Mfr # M12000.330.0001
product price:  $179.99
/pk 2, $90.00/ea
Zoro Select Castle Nut, Steel, Black Oxide M12020.140.0150
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G9900786
Mfr # M12020.140.0150
product price:  $161.99
/pk 50, $3.24/ea
Newport Fasteners 1-14 Slotted Hex Nuts/Steel/Zinc , 60PK 955930
Newport Fasteners

1-14 Slotted Hex Nuts/Steel/Zinc , 60PK

Zoro # G506370963
Mfr # 955930
product price:  $354.99
/pk 60, $5.92/ea
Midwest Fastener 9/16"-12 Zinc Plated Steel Coarse Thread Slotted Hex Nuts 5PK 68552
Midwest Fastener

9/16"-12 Zinc Plated Steel Coarse Thread Slotted Hex Nuts 5PK

Zoro # G602508734
Mfr # 68552
product price:  $9.69
/pk 5, $1.94/ea
Zoro Select 7/8"-14 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 10 pk. 371285G
Zoro Select

7/8"-14 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 10 pk.

Zoro # G0490454
Mfr # 371285G
product price:  $23.59
/pk 10, $2.36/ea
Zoro Select 1-1/4"-12 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 5 pk. 351405G
Zoro Select

1-1/4"-12 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 5 pk.

Zoro # G3450851
Mfr # 351405G
product price:  $23.29
/pk 5, $4.66/ea
Zoro Select 5/16"-18 Grade 2 Zinc Plated Finish Low Carbon Steel Round Slotted Castle Nut, 50 pk. 287050-PG
Zoro Select

5/16"-18 Grade 2 Zinc Plated Finish Low Carbon Steel Round Slotted Castle Nut, 50 pk.

Zoro # G2071413
Mfr # 287050-PG
product price:  $15.19
/pk 50, $0.30/ea
Zoro Select 5/8"-11 Grade 2H Plain Finish Steel Round Slotted Castle Nut, 25 pk. 352188G
Zoro Select

5/8"-11 Grade 2H Plain Finish Steel Round Slotted Castle Nut, 25 pk.

Zoro # G1959036
Mfr # 352188G
product price:  $37.59
/pk 25, $1.50/ea
Zoro Select 1-1/8"-7 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 5 pk. 351345G
Zoro Select

1-1/8"-7 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 5 pk.

Zoro # G0500394
Mfr # 351345G
product price:  $26.29
/pk 5, $5.26/ea
Zoro Select 7/8"-14 Grade 5 Zinc Plated Finish Steel Round Slotted Castle Nut, 10 pk. 351279G
Zoro Select

7/8"-14 Grade 5 Zinc Plated Finish Steel Round Slotted Castle Nut, 10 pk.

Zoro # G1611425
Mfr # 351279G
product price:  $22.69
/pk 10, $2.27/ea
Zoro Select 1-3/8"-6 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 5 pk. 351425G
Zoro Select

1-3/8"-6 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 5 pk.

Zoro # G1719392
Mfr # 351425G
product price:  $41.69
/pk 5, $8.34/ea
Zoro Select Castle Nut, Steel, Black Oxide M12000.240.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G0302429
Mfr # M12000.240.0001
product price:  $37.69
/pk 10, $3.77/ea
Dayton Castle Nut GKK040
Dayton

Castle Nut

Zoro # G2376109
Mfr # GKK040
product price:  $1.79
/ea
Sold in mult. of 11 for $19.69
Zoro Select Castle Nut, Steel, Black Oxide M12000.120.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G0302480
Mfr # M12000.120.0001
product price:  $73.59
/pk 100, $0.74/ea
Zoro Select 1/4"-20 Grade 2 Zinc Plated Finish Low Carbon Steel Round Slotted Castle Nut, 100 pk. 287046-PG
Zoro Select

1/4"-20 Grade 2 Zinc Plated Finish Low Carbon Steel Round Slotted Castle Nut, 100 pk.

Zoro # G0813671
Mfr # 287046-PG
product price:  $22.69
/pk 100, $0.23/ea
Zoro Select 7/16"-20 Grade 2 Zinc Plated Finish Low Carbon Steel Round Slotted Castle Nut, 25 pk. 287260-PG
Zoro Select

7/16"-20 Grade 2 Zinc Plated Finish Low Carbon Steel Round Slotted Castle Nut, 25 pk.

Zoro # G3128815
Mfr # 287260-PG
product price:  $18.89
/pk 25, $0.76/ea
Zoro Select 1-1/8"-12 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 5 pk. 354365G
Zoro Select

1-1/8"-12 Grade 5 Plain Finish Steel Round Slotted Castle Nut, 5 pk.

Zoro # G2072463
Mfr # 354365G
product price:  $23.55
/pk 5, $4.71/ea
Zoro Select Castle Nut, Steel, Black Oxide M12000.200.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G0302447
Mfr # M12000.200.0001
product price:  $56.15
/pk 25, $2.25/ea
Midwest Fastener 5/8"-11 Zinc Plated Steel Coarse Thread Slotted Hex Nuts 4PK 68553
Midwest Fastener

5/8"-11 Zinc Plated Steel Coarse Thread Slotted Hex Nuts 4PK

Zoro # G102508739
Mfr # 68553
product price:  $8.29
/pk 4, $2.07/ea
Sold in mult. of 2 for $16.58
Midwest Fastener 7/8"-9 Zinc Plated Steel Coarse Thread Slotted Hex Nuts 3PK 68555
Midwest Fastener

7/8"-9 Zinc Plated Steel Coarse Thread Slotted Hex Nuts 3PK

Zoro # G702508740
Mfr # 68555
product price:  $12.34
/pk 3, $4.11/ea
No Product Image Available
Zoro Select

Castle Nut, 1-8, Gr 5, Steel, ZP, PK5

Zoro # G115562407
Mfr # U12006.100.0001
product price:  $26.49
/pk 5, $5.30/ea
No Product Image Available
Wilton

Casting Nut w/ Two Pins

Zoro # G1182566
Mfr # 21800-05
product price:  $21.25
/ea
Oxoxo 1 1/4-7 Castle Nut Zinc, 20PK 318071
Oxoxo

1 1/4-7 Castle Nut Zinc, 20PK

Zoro # G622693496
Mfr # 318071
product price:  $544.99
/pk 20, $27.25/ea
Castle Nuts (213 items) - Page 5
  • First
  • Previous
  • 5
    of 6 pages
  • Next
  • Last

About Castle Nuts

Castle nuts are a type of fastener that is used to secure two or more parts together. They are often used in conjunction with bolts, screws, and other types of fasteners to create a secure connection.

Types of Castle Nuts

Castle nuts come in a variety of shapes and sizes depending on their intended use. Slotted castle nuts are commonly used for applications where vibration is an issue, while non-slotted versions are better suited for applications where security is paramount. Many slotted nut manufacturers offer custom designs to meet specific needs.

How Castle Nuts Are Made

Castle nuts are typically made from metal alloys such as steel or brass, but can also be made from other materials such as aluminum or plastic depending on the application requirements. The manufacturing process involves cutting threads into the material and then forming the castle shape around it before adding additional features like slots.

Industries That Use Castle Nuts

Castle nuts are commonly used by professionals in industries such as automotive, construction, aerospace engineering, and robotics due to their ability to securely connect components together without coming loose over time. Wherever high levels of security and reliability are needed when connecting two or more parts together, you will likely find castle nuts being used.

Find the Castle Nuts You Need at Zoro

Looking for a specific item? Use our robust search tool to find it by name or keyword, or use our handy filters to narrow down our full assortment. You can also check out our whole selection of fasteners, along with other tools or supplies to ensure you have all you need to tackle the job, especially if you're taking on a DIY project for the first time.
Plus, when you shop at Zoro, you'll always enjoy competitive prices on tons of great brands you know and trust. We make the shopping experience as fast and seamless as possible with free shipping on orders over $50 for registered users, Net 30 payment terms for qualifying customers, and an unparalleled customer service experience.

Related Categories

Hex NutsLock NutsSpring Nuts & Cage NutsCoupling NutsHex Head Cap Screws
General WashersSocket Head Cap ScrewsCotter PinsFully-Threaded Rods & StudsSpring Pins
castle nutcastle nut castle nut5/8-18 nut5/8-18 nutscastle nut wrench
slotted hex nut3/4-10 nuts3/4-16 nutsmetric castle nuts5/8-11 nuts

Sign Up & Save

Take 10% off your next order when you sign up for Zoro emails. Subscribe now to receive your promo code via email.

Follow Us

  • Facebook
  • YouTube
  • LinkedIn
  • Instagram
Every Part Plays a Part

Information

  • About Us
  • Accessibility
  • Careers
  • Inclusion
  • Giving Back
  • Resource Hub
  • Returns
  • Shipping

Shopping

  • Brands
  • Collections
  • My Account
  • Payments
  • Promo Codes
  • Sitemap
  • Track My Order

Services

  • Customer Service
  • FAQs
  • Net 30 Terms
  • Reseller Program
  • Sell on Zoro
  • Participate in Research

Zoro, Inc

Connect

Customer Service From Real People

  • Phone: (855) 289-9676
  • Contact Us

© 2011-2026 Zoro Tools, Inc. All rights reserved.
  • Terms & Conditions
  • Terms of Access
  • Privacy Policy
Zoro, Inc