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Castle Nuts


Looking for Castle Nuts?

We carry castle nuts, also known as castellated nuts, including Grade 5, per ASME B18.2.2 (1970) specifications.

Stock sizes include: 1/4-28 through 3/4-16 in Steel Zinc.

Scroll down to find your size, or search by part number.

Add to Cart and buy online or email us for a custom quote. Most popular products are in stock and ship within 24 hours.

Can't find what you're looking for? Email us at [email protected] for a custom quote. "We have the right screw for you" is our motto after all!
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3/8-16 Castle Nut Steel Zinc 3/8-16 CASTLE NUTS ZINC [200 PER BOX]
Price per Box: $83.81 / Quantity Discounts Available
3/8-24 Castle Nut Steel Zinc 3/8-24 CASTLE NUTS GR5 ZINC [200 PER BOX]
Price per Box: $86.19 / Quantity Discounts Available
5/16-18 Castle Nut Steel Zinc 5/16-18 CASTLE NUTS ZINC [300 PER BOX]
Price per Box: $109.34 / Quantity Discounts Available
1/2-13 Castle Nut Steel Zinc 1/2-13 CASTLE NUTS ZINC [150 PER BOX]
Price per Box: $110.80 / Quantity Discounts Available
1/2-20 Castle Nut Steel Zinc 1/2-20 CASTLE NUTS GR5 ZINC [150 PER BOX]
Price per Box: $125.76 / Quantity Discounts Available
5/16-24 Castle Nut Steel Zinc 5/16-24 CASTLE NUTS GR5 ZINC [300 PER BOX]
Price per Box: $127.02 / Quantity Discounts Available
5/16-24 Castle Nut Steel Zinc 5/16-24 CASTLE NUTS ZINC [300 PER BOX]
Price per Box: $130.28 / Quantity Discounts Available
7/16-20 Castle Nut Steel Zinc 7/16-20 CASTLE NUTS GR5 ZINC [200 PER BOX]
Price per Box: $144.60 / Quantity Discounts Available
7/8-9 Castle Nut Steel Zinc 7/8-9 CASTLE NUTS ZINC [60 PER BOX]
Price per Box: $145.37 / Quantity Discounts Available
3/4-16 Castle Nut Steel Zinc 3/4-16 CASTLE NUTS GR5 ZINC [100 PER BOX]
Price per Box: $146.09 / Quantity Discounts Available
1/2-20 Castle Nut Steel Zinc 1/2-20 CASTLE NUTS ZINC [150 PER BOX]
Price per Box: $155.32 / Quantity Discounts Available
3/8-24 Castle Nut Steel Zinc 3/8-24 CASTLE NUTS ZINC [200 PER BOX]
Price per Box: $173.59 / Quantity Discounts Available
9/16-12 Castle Nut Steel Zinc 9/16-12 CASTLE NUTS ZINC [250 PER BOX]
Price per Box: $174.95 / Quantity Discounts Available
9/16-18 Castle Nut Steel Zinc 9/16-18 CASTLE NUTS GR5 ZINC [200 PER BOX]
Price per Box: $175.29 / Quantity Discounts Available
5/8-11 Castle Nut Steel Zinc 5/8-11 CASTLE NUTS ZINC [150 PER BOX]
Price per Box: $187.98 / Quantity Discounts Available
7/16-20 Castle Nut Steel Zinc 7/16-20 CASTLE NUTS ZINC [200 PER BOX]
Price per Box: $188.48 / Quantity Discounts Available
3/4-10 Castle Nut Steel Zinc 3/4-10 CASTLE NUTS ZINC [100 PER BOX]
Price per Box: $196.20 / Quantity Discounts Available
7/8-14 Castle Nut Steel Zinc 7/8-14 CASTLE NUTS GR5 ZINC [60 PER BOX]
Price per Box: $205.78 / Quantity Discounts Available
5/8-18 Castle Nut Steel Zinc 5/8-18 CASTLE NUTS GR5 ZINC [150 PER BOX]
Price per Box: $211.04 / Quantity Discounts Available
3/4-16 Castle Nut Steel Zinc 3/4-16 CASTLE NUTS ZINC [100 PER BOX]
Price per Box: $249.26 / Quantity Discounts Available
7/8-14 Castle Nut Steel Zinc 7/8-14 CASTLE NUTS ZINC [60 PER BOX]
Price per Box: $251.11 / Quantity Discounts Available
1-14 Castle Nut Steel Zinc 1-14 CASTLE NUTS GR5 ZINC [50 PER BOX]
Price per Box: $261.75 / Quantity Discounts Available
9/16-18 Castle Nut Steel Zinc 9/16-18 CASTLE NUTS ZINC [200 PER BOX]
Price per Box: $268.32 / Quantity Discounts Available
1-8 Castle Nut Steel Zinc 1-8 CASTLE NUTS ZINC [50 PER BOX]
Price per Box: $282.28 / Quantity Discounts Available
5/8-18 Castle Nut Steel Zinc 5/8-18 CASTLE NUTS ZINC [150 PER BOX]
Price per Box: $287.38 / Quantity Discounts Available
1-1/4-7 Castle Nut Steel Zinc 1 1/4-7 CASTLE NUTS ZINC [20 PER BOX]
Price per Box: $382.72 / Quantity Discounts Available
1-14 Castle Nut Steel Zinc 1-14 CASTLE NUTS ZINC [50 PER BOX]
Price per Box: $396.97 / Quantity Discounts Available
1/4-28 Castle Nut Steel Zinc 1/4-28 CASTLE NUTS ZINC [2000 PER BOX]
Price per Box: $677.85 / Quantity Discounts Available
1/4-28 Castle Nut Steel Zinc 1/4-28 CASTLE NUTS GR5 ZINC [2000 PER BOX]
Price per Box: $797.83 / Quantity Discounts Available
   
 
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