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Square Nuts

Looking for square nuts?

We carry heavy square nuts, regular square nuts, and square machine screw nuts.

Stock sizes include 2-56 through 1-1/2-6 in Steel and 18-8 Stainless.

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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5/16-18 Square Machine Screw Nut Stainless Steel 5/16-18 SQUARE MACHINE SCREW NUT STAINLESS STEEL [1000 PER BOX]
Price per Box: $467.71 / Quantity Discounts Available
1/4-20 Square Machine Screw Nut Stainless Steel 1/4-20 SQUARE MACHINE SCREW NUT STAINLESS STEEL [1500 PER BOX]
Price per Box: $267.75 / Quantity Discounts Available
3/18-16 Square Machine Screw Nut Stainless Steel 3/8-16 SQUARE MACHINE SCREW NUT STAINLESS STEEL [500 PER BOX]
Price per Box: $207.75 / Quantity Discounts Available
10-24 Square Machine Screw Nut Stainless Steel 10-24 SQUARE MACHINE SCREW NUT STAINLESS STEEL [2500 PER BOX]
Price per Box: $351.56 / Quantity Discounts Available
10-32 Square Machine Screw Nut Stainless Steel 10-32 SQUARE MACHINE SCREW NUT STAINLESS STEEL [2500 PER BOX]
Price per Box: $390.00 / Quantity Discounts Available
12-24 Square Machine Screw Nut Stainless Steel 12-24 SQUARE MACHINE SCREW NUT STAINLESS STEEL [2500 PER BOX]
Price per Box: $330.41 / Quantity Discounts Available
6-32 Square Machine Screw Nut Stainless Steel 6-32 SQUARE MACHINE SCREW NUT STAINLESS STEEL [2500 PER BOX]
Price per Box: $220.13 / Quantity Discounts Available
8-32 Square Machine Screw Nut Stainless Steel 8-32 SQUARE MACHINE SCREW NUT STAINLESS STEEL [2500 PER BOX]
Price per Box: $236.25 / Quantity Discounts Available
5/16-18 Regular Square Nut Steel Plain 5/16-18 SQUARE NUT REGULAR GRD 5 PLAIN [2000 PER BOX]
1/2-13 Regular Square Nut Steel Plain 1/2-13 SQUARE NUT REGULAR GRD 5 PLAIN [500 PER BOX]
1/4-20 Regular Square Nut Steel Plain 1/4-20 SQUARE NUT REGULAR GRD 5 PLAIN [4000 PER BOX]
3/4-10 Regular Square Nut Steel Plain 3/4-10 SQUARE NUT REGULAR GRD 5 PLAIN [200 PER BOX]
3/8-16 Regular Square Nut Steel Plain 3/8-16 SQUARE NUT REGULAR GRD 5 PLAIN [1500 PER BOX]
5/16-18 Regular Square Nut Steel Zinc 5/16-18 SQUARE NUT REGULAR GRD 5 ZINC [2000 PER BOX]
5/16-18 Regular Square Nut Steel Hot Dip Galvanized 5/16-18 SQUARE NUT REGULAR GALVANIZED [1000 PER BOX]
Price per Box: $133.49 / Quantity Discounts Available
1/2-13 Regular Square Nut Steel Zinc 1/2-13 SQUARE NUT REGULAR GRD 5 ZINC [500 PER BOX]
1/2-13 Regular Square Nut Steel Hot Dip Galvanized 1/2-13 SQUARE NUT REGULAR GALVANIZED [300 PER BOX]
Price per Box: $121.50 / Quantity Discounts Available
1/4-20 Regular Square Nut Steel Zinc 1/4-20 SQUARE NUT REGULAR GRD 5 ZINC [4000 PER BOX]
1/4-20 Regular Square Nut Steel Hot Dip Galvanized 1/4-20 SQUARE NUT REGULAR GALVANIZED [2000 PER BOX]
Price per Box: $131.56 / Quantity Discounts Available
3/4-10 Regular Square Nut Steel Zinc 3/4-10 SQUARE NUT REGULAR GRD 5 ZINC [200 PER BOX]
3/4-10 Regular Square Nut Steel Hot Dip Galvanized 3/4-10 SQUARE NUT REGULAR GALVANIZED [100 PER BOX]
Price per Box: $108.01 / Quantity Discounts Available
3/8-16 Regular Square Nut Steel Zinc 3/8-16 SQUARE NUT REGULAR GRD 5 ZINC [1500 PER BOX]
3/8-16 Regular Square Nut Steel Hot Dip Galvanized 3/8-16 SQUARE NUT REGULAR GALVANIZED [700 PER BOX]
Price per Box: $110.11 / Quantity Discounts Available
5/8-11 Regular Square Nut Steel Hot Dip Galvanized 5/8-11 SQUARE NUT REGULAR GALVANIZED [200 PER BOX]
Price per Box: $151.25 / Quantity Discounts Available
7/8-9 Regular Square Nut Steel Hot Dip Galvanized 7/8-9 SQUARE NUT REGULAR GALVANIZED [50 PER BOX]
Price per Box: $88.80 / Quantity Discounts Available
1-8 Regular Square Nut Steel Hot Dip Galvanized 1-8 SQUARE NUT REGULAR GALVANIZED [50 PER BOX]
Price per Box: $141.23 / Quantity Discounts Available
1/2-13 Heavy Square Nut Steel Plain 1/2-13 HEAVY SQUARE NUT PLAIN [300 PER BOX]
Price per Box: $156.54 / Quantity Discounts Available
3/4-10 Heavy Square Nut Steel Plain 3/4-10 HEAVY SQUARE NUT PLAIN [100 PER BOX]
Price per Box: $201.83 / Quantity Discounts Available
5/8-11 Heavy Square Nut Steel Plain 5/8-11 HEAVY SQUARE NUT PLAIN [200 PER BOX]
Price per Box: $164.66 / Quantity Discounts Available
7/8-9 Heavy Square Nut Steel Plain 7/8-9 HEAVY SQUARE NUT PLAIN [100 PER BOX]
Price per Box: $188.91 / Quantity Discounts Available
2-56 Square Machine Screw Nut Zinc [5000 pieces] 2-56 Square Machine Screw Nut Zinc [5000 per box]
Price per Box: $159.73 / Quantity Discounts Available
4-40 Square Machine Screw Nut Zinc [5000 pieces] 4-40 Square Machine Screw Nut Zinc [5000 per box]
Price per Box: $208.48 / Quantity Discounts Available
5-40 Square Machine Screw Nut Zinc [5000 pieces] 5-40 Square Machine Screw Nut Zinc [5000 per box]
Price per Box: $143.61 / Quantity Discounts Available
6-32 Square Machine Screw Nut Zinc [5000 pieces] 6-32 Square Machine Screw Nut Zinc [5000 per box]
Price per Box: $166.78 / Quantity Discounts Available
8-32 Square Machine Screw Nut Zinc [5000 pieces] 8-32 Square Machine Screw Nut Zinc [5000 per box]
Price per Box: $234.67 / Quantity Discounts Available
10-24 Square Machine Screw Nut Zinc [5000 pieces] 10-24 Square Machine Screw Nut Zinc [5000 per box]
Price per Box: $169.34 / Quantity Discounts Available
10-32 Square Machine Screw Nut Zinc [5000 pieces] 10-32 Square Machine Screw Nut Zinc [5000 per box]
Price per Box: $145.39 / Quantity Discounts Available
12-24 Square Machine Screw Nut Zinc [3000 pieces] 12-24 Square Machine Screw Nut Zinc [3000 per box]
Price per Box: $182.93 / Quantity Discounts Available
1/4-20 Square Machine Screw Nut Zinc [3000 pieces] 1/4-20 Square Machine Screw Nut Zinc [3000 per box]
Price per Box: $237.51 / Quantity Discounts Available
1/4-20 Square Machine Screw Nut Black Oxide [3000 pieces] 1/4-20 Square Machine Screw Nut Black Oxide [3000 per box]
Price per Box: $214.46 / Quantity Discounts Available
1/4-20 Regular Square Nut Zinc [2000 pieces] 1/4-20 Regular Square Nut Zinc [2000 per box]
Price per Box: $133.46 / Quantity Discounts Available
1/4-28 Square Machine Screw Nut Zinc [3000 pieces] 1/4-28 Square Machine Screw Nut Zinc [3000 per box]
Price per Box: $242.33 / Quantity Discounts Available
5/16-18 Square Machine Screw Nut Zinc [2000 pieces] 5/16-18 Square Machine Screw Nut Zinc [2000 per box]
Price per Box: $202.15 / Quantity Discounts Available
5/16-18 Regular Square Nut Zinc [1000 pieces] 5/16-18 Regular Square Nut Zinc [1000 per box]
Price per Box: $104.44 / Quantity Discounts Available
3/8-16 Square Machine Screw Nut Zinc [1000 pieces] 3/8-16 Square Machine Screw Nut Zinc [1000 per box]
Price per Box: $160.58 / Quantity Discounts Available
3/8-16 Regular Square Nut Zinc [700 pieces] 3/8-16 Regular Square Nut Zinc [700 per box]
Price per Box: $87.43 / Quantity Discounts Available
7/16-14 Regular Square Nut Zinc [400 pieces] 7/16-14 Regular Square Nut Zinc [400 per box]
Price per Box: $116.00 / Quantity Discounts Available
1/2-13 Regular Square Nut Zinc [300 pieces] 1/2-13 Regular Square Nut Zinc [300 per box]
Price per Box: $114.16 / Quantity Discounts Available
1-8 Regular Square Nut Zinc [50 pieces] 1-8 Regular Square Nut Zinc [50 per box]
Price per Box: $124.29 / Quantity Discounts Available
1 1/8-7 Regular Square Nut Zinc [30 pieces] 1 1/8-7 Regular Square Nut Zinc [30 per box]
Price per Box: $56.84 / Quantity Discounts Available
1 1/4-7 Regular Square Nut Zinc [20 pieces] 1 1/4-7 Regular Square Nut Zinc [20 per box]
Price per Box: $92.40 / Quantity Discounts Available
12-24 Square Machine Screw Nut Zinc [3000 pieces] 12-24 Square Machine Screw Nut Zinc [3000 pieces]
Get a custom quote today!
 
1 1/2-6 Regular Square Nut Zinc [10 pieces] 1 1/2-6 Regular Square Nut Zinc [10 per box]
Price per Box: $76.50 / Quantity Discounts Available
5/8-11 Regular Square Nut Zinc [200 pieces] 5/8-11 Regular Square Nut Zinc [200 per box]
Price per Box: $169.37 / Quantity Discounts Available
3/4-10 Regular Square Nut Zinc [100 pieces] 3/4-10 Regular Square Nut Zinc [100 per box]
Price per Box: $96.19 / Quantity Discounts Available
7/8-9 Regular Square Nut Zinc [50 pieces] 7/8-9 Regular Square Nut Zinc [50 per box]
Price per Box: $115.56 / Quantity Discounts Available
   
 
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