A square nut is a four-sided fastener designed to increase surface contact with the item it is fastening to create a higher grip and less ability to loosen. Because of their strength and access with a wrench, square nuts are used primarily in industrial and construction applications. Caliper Overseas is a well-known Square Nut Manufacturer and Supplier in India and provides a full range of sizes from M3 to M48 including special sizes, as per standards such as DIN 557, DIN 562, DIN 928, DIN 798 and DIN 928.
These square nuts are manufactured in a number of materials, including stainless steel, low carbon steel, high tensile, nickel alloy, alloy steel, mild steel, copper, brass and aluminium. They provide excellent strength and corrosion resistance and long-term performance in both indoor and outdoor applications. The square form enables better torque and avoids slippage during installation.
Contact us today to find the perfect square nut for your needs.

| Square Nuts Size | • Cold Froging : M2-M24 • Hot forging M24-M100, 1-1/2” Dia, up to 1100mm lg • Machining and CNC for Customized connecting element: up to M100 / 4” Dia, up to 1500mm lg Stainless Steel Square Nuts M2, M3, (M3.5), M4, M5, M6, M8, M10, M12, (M14), M16, (M18), M20, (M22), M24, (M27), M30, M33, M36, M42, (M45), M48 to M160 and Custom Sizes |
|---|---|
| Square Nuts Length | 3 mm to 200 mm |
| UTS – Unified Thread Standard | UNC, UNF, UNEF, UNS, NPT, NPTF |
| Standard | DIN 557, DIN 562, DIN 928, DIN 798, DIN 928 |
| Types | Foundation Square Nuts, Flat Square Nut, Square Locking Nut, Square Cage Nuts |
| Application | Wind tower, Nuclear power, Railway, Automotive industry, Construction, Electronic industry |
| Manufacturing Process | Cold Heading, Insert tapping, Heat Treatment, Surface Plating, Inspection, Packing |
| Coatings | Black Oxide, Cadmium, Galvanized, Teflon, Xylan, Zinc, Others Upon Request |
|
Nominal or
Basic Major Diameter of Thread |
F
|
G
|
H
|
||||||
|---|---|---|---|---|---|---|---|---|---|
|
Width Across Flats
|
Width Across Corners
|
Length
|
|||||||
|
Basic
|
Max
|
Min
|
Max
|
Min
|
Basic
|
Max
|
Min
|
||
|
1/4
|
0.2500
|
7/16
|
0.438
|
0.425
|
0.619
|
0.554
|
7/32
|
0.235
|
0.203
|
|
5/16
|
0.3125
|
9/16
|
0.562
|
0.547
|
0.795
|
0.721
|
17/64
|
0.283
|
0.249
|
|
3/8
|
0.3750
|
5/8
|
0.625
|
0.606
|
0.884
|
0.802
|
21/64
|
0.346
|
0.310
|
|
7/16
|
0.4375
|
3/4
|
0.750
|
0.728
|
1.061
|
0.970
|
3/8
|
0.394
|
0.356
|
|
1/2
|
0.5000
|
13/16
|
0.812
|
0.788
|
1.149
|
1.052
|
7/16
|
0.458
|
0.418
|
|
5/8
|
0.6250
|
1″
|
1.000
|
0.969
|
1.414
|
1.300
|
35/64
|
0.569
|
0.525
|
|
3/4
|
0.7500
|
1-1/8
|
1.125
|
1.088
|
1.591
|
1.464
|
21/32
|
0.680
|
0.632
|
|
7/8
|
0.8750
|
1-5/16
|
1.312
|
1.269
|
1.856
|
1.712
|
49/64
|
0.792
|
0.740
|
|
1″
|
1.0000
|
1-1/2
|
1.500
|
1.450
|
2.121
|
1.961
|
7/8
|
0.903
|
0.847
|
|
1-1/4
|
1.2500
|
1-7/8
|
1.875
|
1.812
|
2.652
|
2.458
|
1-3/32
|
1.126
|
1.062
|
|
1-1/2
|
1.5000
|
2-1/4
|
2.250
|
2.175
|
3.182
|
2.956
|
1-5/16
|
1.348
|
1.
|
|
Size
|
Finished Hex
|
Heavy Hex
|
Finished Jam
|
Heavy Hex Jam
|
Square
|
Heavy Square
|
|---|---|---|---|---|---|---|
|
1/2″
|
3.750
|
6.540
|
2.620
|
4.000
|
5.780
|
7.870
|
|
5/8″
|
7.330
|
11.900
|
4.930
|
6.960
|
10.800
|
14.300
|
|
3/4″
|
11.900
|
19.300
|
7.700
|
11.000
|
15.400
|
23.500
|
|
7/8″
|
19.000
|
29.700
|
12.000
|
16.700
|
24.500
|
36.200
|
|
1″
|
28.300
|
42.500
|
17.600
|
23.500
|
36.300
|
51.500
|
|
1-1/8″
|
40.300
|
59.200
|
24.700
|
32.400
|
52.500
|
72.400
|
|
1-1/4″
|
54.300
|
78.600
|
36.100
|
45.800
|
70.600
|
95.500
|
|
1-3/8″
|
73.000
|
102.000
|
47.900
|
59.300
|
94.500
|
125.000
|
|
1-1/2″
|
94.300
|
131.000
|
60.900
|
74.800
|
122.000
|
161.000
|
|
1-5/8″
|
162.000
|
91.600
|
||||
|
1-3/4″
|
151.000
|
204.000
|
100.000
|
114.000
|
||
|
1-7/8″
|
241.000
|
134.000
|
||||
|
2″
|
224.000
|
299.000
|
140.000
|
165.000
|
||
|
2-1/4″
|
419.000
|
227.000
|
||||
|
2-1/2″
|
564.000
|
332.000
|
||||
|
2-3/4″
|
738.000
|
429.000
|
||||
|
3″
|
950.000
|
545.000
|
||||
|
3-1/4″
|
1194.000
|
651.000
|
||||
|
3-1/2″
|
1526.000
|
851.000
|
||||
|
3-3/4″
|
1812.000
|
1005.000
|
||||
|
4″
|
2180.000
|
1200.000
|
Square Nuts in Distillery Plants
Square Nuts in Sugar Industries
Square Nuts in Process Industries
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Square Nuts in Petrochemical Plants
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Square Nuts Stock Availability
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