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
  • Deals
  • 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
User Headset Icon User Headset Icon Customer Service
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

Castle Nuts (213 items) - Page 4

Huyett Slotted Locking Hex Nut 1/4x7/32 Steel Zinc Clear Trivalent NUTH00-0250-0218S3
Huyett

Slotted Locking Hex Nut 1/4x7/32 Steel Zinc Clear Trivalent

Zoro # G213330670
Mfr # NUTH00-0250-0218S3
product price:  $0.13
/ea
Sold in mult. of 127 for $16.51
Huyett Slotted Locking Hex Nut 3/8x21/64 Steel Zinc Clear Trivalent NUTH01-0375-0328S3
Huyett

Slotted Locking Hex Nut 3/8x21/64 Steel Zinc Clear Trivalent

Zoro # G113331258
Mfr # NUTH01-0375-0328S3
product price:  $0.22
/ea
Sold in mult. of 81 for $17.82
Zoro Select 5/8-11 CASTLE NUTS ZINC, PK150 62NHC
Zoro Select

5/8-11 CASTLE NUTS ZINC, PK150

Zoro # G2442192
Mfr # 62NHC
product price:  $203.99
/pk 150, $1.36/ea
Zoro Select 5/16-18 CASTLE NUTS ZINC, PK300 31NHC
Zoro Select

5/16-18 CASTLE NUTS ZINC, PK300

Zoro # G2441921
Mfr # 31NHC
product price:  $112.99
/pk 300, $0.38/ea
Huyett Slotted Locking Hex Nut 1/2x7/16 Steel Plain NUTH00-0500-0437SP
Huyett

Slotted Locking Hex Nut 1/2x7/16 Steel Plain

Zoro # G713330644
Mfr # NUTH00-0500-0437SP
product price:  $0.23
/ea
Sold in mult. of 650 for $149.50
Huyett Slotted Locking Hex Nut 9/16x31/64 Steel Zinc Clear Trivalent NUTH01-0562-0484S3
Huyett

Slotted Locking Hex Nut 9/16x31/64 Steel Zinc Clear Trivalent

Zoro # G513331018
Mfr # NUTH01-0562-0484S3
product price:  $0.63
/ea
Sold in mult. of 26 for $16.38
Huyett Slotted Locking Hex Nut 5/8x35/64 Steel Zinc Clear Trivalent NUTH01-0625-0546S3
Huyett

Slotted Locking Hex Nut 5/8x35/64 Steel Zinc Clear Trivalent

Zoro # G913330833
Mfr # NUTH01-0625-0546S3
product price:  $0.43
/ea
Sold in mult. of 38 for $16.34
Zoro Select Castle Nut, Steel, Black Oxide M12000.060.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G0302517
Mfr # M12000.060.0001
product price:  $41.95
/pk 100, $0.42/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 3/8-16 CASTLE NUTS ZINC, PK200 37NHC
Zoro Select

3/8-16 CASTLE NUTS ZINC, PK200

Zoro # G2442000
Mfr # 37NHC
product price:  $79.59
/pk 200, $0.40/ea
Newport Fasteners 1-14 Slotted Hex Nuts/Steel/Zinc , 10PK NB287288P-10
Newport Fasteners

1-14 Slotted Hex Nuts/Steel/Zinc , 10PK

Zoro # G006371071
Mfr # NB287288P-10
product price:  $83.85
/pk 10, $8.39/ea
Newport Fasteners 1-14 Slotted Hex Nuts/Steel/Plain , 10PK NB286288P-10
Newport Fasteners

1-14 Slotted Hex Nuts/Steel/Plain , 10PK

Zoro # G506371137
Mfr # NB286288P-10
product price:  $88.65
/pk 10, $8.87/ea
Zoro Select 9/16-18 CASTLE NUTS GR5 ZINC, PK200 57NHC5
Zoro Select

9/16-18 CASTLE NUTS GR5 ZINC, PK200

Zoro # G2442350
Mfr # 57NHC5
product price:  $170.99
/pk 200, $0.85/ea
Huyett Slotted Locking Hex Nut 1x55/64 Steel Plain NUTH00-1000-0859SP
Huyett

Slotted Locking Hex Nut 1x55/64 Steel Plain

Zoro # G413331262
Mfr # NUTH00-1000-0859SP
product price:  $2.15
/ea
Sold in mult. of 9 for $19.35
Huyett Slotted Locking Hex Nut 1x55/64 Steel Zinc Clear Trivalent NUTHR2-1000-0859S3
Huyett

Slotted Locking Hex Nut 1x55/64 Steel Zinc Clear Trivalent

Zoro # G113330701
Mfr # NUTHR2-1000-0859S3
product price:  $2.95
/ea
Sold in mult. of 6 for $17.70
Huyett Slotted Locking Hex Nut 1/2x7/16 Steel Zinc Clear Trivalent NUTH00-0500-0437S3
Huyett

Slotted Locking Hex Nut 1/2x7/16 Steel Zinc Clear Trivalent

Zoro # G313330662
Mfr # NUTH00-0500-0437S3
product price:  $0.40
/ea
Sold in mult. of 42 for $16.80
Huyett Slotted Locking Hex Nut 1-1/4x1-1/16 Steel Zinc Clear Trivalent NUTH01-1250-1062S3
Huyett

Slotted Locking Hex Nut 1-1/4x1-1/16 Steel Zinc Clear Trivalent

Zoro # G013330818
Mfr # NUTH01-1250-1062S3
product price:  $2.95
/ea
Sold in mult. of 4 for $11.80
Huyett Slotted Locking Hex Nut 1-1/8x31/32 Steel Plain NUTH01-1125-0968SP
Huyett

Slotted Locking Hex Nut 1-1/8x31/32 Steel Plain

Zoro # G713330774
Mfr # NUTH01-1125-0968SP
product price:  $3.55
/ea
Sold in mult. of 5 for $17.75
Newport Fasteners 1-14 Slotted Hex Nuts/Steel/Zinc , 100PK NB287288B-100
Newport Fasteners

1-14 Slotted Hex Nuts/Steel/Zinc , 100PK

Zoro # G506371106
Mfr # NB287288B-100
product price:  $277.99
/pk 100, $2.78/ea
Huyett Slotted Locking Hex Nut 7/16x3/8 Steel Zinc Clear Trivalent NUTH00-0437-0375S3
Huyett

Slotted Locking Hex Nut 7/16x3/8 Steel Zinc Clear Trivalent

Zoro # G713330828
Mfr # NUTH00-0437-0375S3
product price:  $0.32
/ea
Sold in mult. of 53 for $16.96
Huyett Slotted Locking Hex Nut 3/4x41/64 Steel Zinc Clear Trivalent NUTH01-0750-0640S3
Huyett

Slotted Locking Hex Nut 3/4x41/64 Steel Zinc Clear Trivalent

Zoro # G213330823
Mfr # NUTH01-0750-0640S3
product price:  $0.98
/ea
Sold in mult. of 18 for $17.64
Zoro Select 1/4-28 CASTLE NUTS GR5 ZINC, PK2000 15NHC5
Zoro Select

1/4-28 CASTLE NUTS GR5 ZINC, PK2000

Zoro # G2442420
Mfr # 15NHC5
product price:  $854.99
/pk 2000, $0.43/ea
Huyett Slotted Locking Hex Nut 7/8x3/4 Steel Zinc Clear Trivalent NUTH00-0875-0750S3
Huyett

Slotted Locking Hex Nut 7/8x3/4 Steel Zinc Clear Trivalent

Zoro # G413331224
Mfr # NUTH00-0875-0750S3
product price:  $1.55
/ea
Sold in mult. of 12 for $18.60
Huyett Slotted Locking Hex Nut 1-1/2x1-9/32 Steel Plain NUTH01-1500-1281SP
Huyett

Slotted Locking Hex Nut 1-1/2x1-9/32 Steel Plain

Zoro # G813330643
Mfr # NUTH01-1500-1281SP
product price:  $3.85
/ea
Sold in mult. of 25 for $96.25
Huyett Slotted Locking Hex Nut 1/2x7/16 Steel Zinc Clear Trivalent NUTH01-0500-0437S3
Huyett

Slotted Locking Hex Nut 1/2x7/16 Steel Zinc Clear Trivalent

Zoro # G313331034
Mfr # NUTH01-0500-0437S3
product price:  $0.40
/ea
Sold in mult. of 42 for $16.80
Zoro Select Castle Nut, Steel, Black Oxide M12020.100.0100
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G9900759
Mfr # M12020.100.0100
product price:  $77.29
/pk 100, $0.77/ea
Huyett Slotted Locking Hex Nut 1-1/8x31/32 Steel Plain NUTH00-1125-0968SP
Huyett

Slotted Locking Hex Nut 1-1/8x31/32 Steel Plain

Zoro # G613331260
Mfr # NUTH00-1125-0968SP
product price:  $1.55
/ea
Sold in mult. of 60 for $93.00
Zoro Select 1/2-20 CASTLE NUTS ZINC, PK150 51NHC
Zoro Select

1/2-20 CASTLE NUTS ZINC, PK150

Zoro # G2441912
Mfr # 51NHC
product price:  $148.99
/pk 150, $0.99/ea
Huyett Slotted Locking Hex Nut 1-1/4x1-1/16 Steel Zinc Clear Trivalent NUTH00-1250-1062S3
Huyett

Slotted Locking Hex Nut 1-1/4x1-1/16 Steel Zinc Clear Trivalent

Zoro # G413331286
Mfr # NUTH00-1250-1062S3
product price:  $2.75
/ea
Sold in mult. of 50 for $137.50
Huyett Slotted Locking Hex Nut 1x55/64 Steel Zinc Clear Trivalent NUTH00-1000-0859S3
Huyett

Slotted Locking Hex Nut 1x55/64 Steel Zinc Clear Trivalent

Zoro # G013331181
Mfr # NUTH00-1000-0859S3
product price:  $2.45
/ea
Sold in mult. of 7 for $17.15
Huyett Slotted Locking Hex Nut 7/16x3/8 Steel Zinc Clear Trivalent NUTH01-0437-0375S3
Huyett

Slotted Locking Hex Nut 7/16x3/8 Steel Zinc Clear Trivalent

Zoro # G313331010
Mfr # NUTH01-0437-0375S3
product price:  $0.58
/ea
Sold in mult. of 29 for $16.82
Huyett Slotted Locking Hex Nut 7/16x3/8 Steel Plain NUTH00-0437-0375SP
Huyett

Slotted Locking Hex Nut 7/16x3/8 Steel Plain

Zoro # G313330624
Mfr # NUTH00-0437-0375SP
product price:  $0.10
/ea
Sold in mult. of 1000 for $100.00
Zoro Select 1/2-20 CASTLE NUTS GR5 ZINC, PK150 51NHC5
Zoro Select

1/2-20 CASTLE NUTS GR5 ZINC, PK150

Zoro # G2442463
Mfr # 51NHC5
product price:  $140.99
/pk 150, $0.94/ea
Zoro Select 3/4-10 CASTLE NUTS ZINC, PK100 75NHC
Zoro Select

3/4-10 CASTLE NUTS ZINC, PK100

Zoro # G2441991
Mfr # 75NHC
product price:  $177.99
/pk 100, $1.78/ea
Zoro Select Castle Nut, Steel, Black Oxide M12000.100.0001
Zoro Select

Castle Nut, Steel, Black Oxide

Zoro # G0302499
Mfr # M12000.100.0001
product price:  $72.95
/pk 100, $0.73/ea
Huyett Slotted Locking Hex Nut 5/8x35/64 Steel Zinc Clear Trivalent NUTH00-0625-0546S3
Huyett

Slotted Locking Hex Nut 5/8x35/64 Steel Zinc Clear Trivalent

Zoro # G813330605
Mfr # NUTH00-0625-0546S3
product price:  $0.60
/ea
Sold in mult. of 28 for $16.80
Castle Nuts (213 items) - Page 4
  • First
  • Previous
  • 4
    of 6 pages
  • Next
  • Last
How was your search?

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 NutsCap Nuts & Acorn NutsGeneral Washers
Hex Head Cap ScrewsLock WashersSocket Head Cap ScrewsFully-Threaded Rods & StudsMachine Screws
castle nuts3/4-16 nutsmetric castle nuts5/8-18 nutcastle nut wrench
slotted hex nut5/8-11 nutscastle nutcastle nut castle nut5/8-18 nuts

Sign up and 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
  • Deals
  • 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