A hex nut is a six sided fastener that is used with bolts, screws and additionally threaded items to fasten two or more objects together. Hex nuts are widely used in construction, automotive and machinery applications. Caliper Overseas is a reputable hex nut manufacturer & supplier in India supplying quality hex nuts made to many international standards, including DIN 934, UNC, UNF, ISO 4032 and ISO 4034. Hex nuts are manufactured from carbon steel, alloy steel and stainless steel; available with finishes including plain, white zinc plated, yellow zinc plated or other customer requirements.
These hex nuts have qualities like high tensile strength, abrasion and corrosion resistance and the capability to handle extreme temperature and vibrational stress. They have uniform threading which allows the nuts to be installed quickly and ensures secure fit. These nuts also have superior dimension accuracy and load-bearing capacity which ensures long-term reliability in varying conditions.
Call us today if you need dependable and quality hex nuts!

| Hex Nuts Size | M02 to M33 |
|---|---|
| Diameter | 1/2″ up to 4″ |
| Threads Configuration | ASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads |
| Length | 3 mm to 200 mm |
| Types | Heavy Hex Nuts, Large Heavy Hex Nuts, Heavy Hex Jam Nut, Heavy Hex Coupling Nut, Heavy Duty Hex Nuts |
| Dimensions | ASME B18.2.2 Heavy Hex Nuts, ASME B18.2.4.6M Metric Heavy Hex 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 Size |
TPI |
Unit |
Width Across Flats |
Width Across Corners |
Thickness Hex Nut |
Minor diameter (Bore) |
Ran out of Bearing Face FIM |
||||||
|
F |
G |
H |
(d) |
Specified Proof Load |
|||||||||
|
Up to 150,000 psi |
150,000 psi and Greater |
||||||||||||
|
Min. |
Max. |
Min. |
Max. |
Min. |
Max. |
Min. |
Max. |
Max. |
|||||
|
1/4 |
0.25 |
20 UNC |
Inch |
0.428 |
0.438 |
0.488 |
0.505 |
0.212 |
0.226 |
0.196 |
0.207 |
0.015 |
0.010 |
|
mm |
10.87 |
11.13 |
12.40 |
12.83 |
5.38 |
5.74 |
4.98 |
5.26 |
|||||
|
5/16 |
0.3125 |
18 UNC |
Inch |
0.489 |
0.500 |
0.557 |
0.577 |
0.258 |
0.273 |
0.252 |
0.265 |
0.016 |
0.011 |
|
mm |
12.42 |
12.70 |
14.15 |
14.66 |
6.55 |
6.93 |
6.40 |
6.73 |
|||||
|
3/8 |
0.375 |
16 UNC |
Inch |
0.551 |
0.562 |
0.628 |
0.650 |
0.320 |
0.337 |
0.307 |
0.321 |
0.017 |
0.012 |
|
mm |
14.00 |
14.27 |
15.95 |
16.51 |
8.13 |
8.56 |
7.80 |
8.15 |
|||||
|
7/16 |
0.4375 |
14 UNC |
Inch |
0.675 |
0.688 |
0.768 |
0.794 |
0.365 |
0.385 |
0.360 |
0.376 |
0.018 |
0.013 |
|
mm |
17.15 |
17.48 |
19.51 |
20.17 |
9.27 |
9.78 |
9.14 |
9.55 |
|||||
|
1/2 |
0.5 |
13 UNC |
Inch |
0.736 |
0.750 |
0.840 |
0.866 |
0.427 |
0.448 |
0.417 |
0.434 |
0.019 |
0.014 |
|
mm |
18.69 |
19.05 |
21.34 |
22.00 |
10.85 |
11.38 |
10.59 |
11.02 |
|||||
|
9/16 |
0.5625 |
12 UNC |
Inch |
0.861 |
0.875 |
0.982 |
1.010 |
0.473 |
0.496 |
0.472 |
0.490 |
0.020 |
0.015 |
|
mm |
21.87 |
22.23 |
24.94 |
25.65 |
12.01 |
12.60 |
11.99 |
12.45 |
|||||
|
5/8 |
0.625 |
11 UNC |
Inch |
0.922 |
0.938 |
1.051 |
1.083 |
0.535 |
0.559 |
0.527 |
0.546 |
0.021 |
0.016 |
|
mm |
23.42 |
23.83 |
26.70 |
27.51 |
13.59 |
14.20 |
13.39 |
13.87 |
|||||
|
3/4 |
0.75 |
10 UNC |
Inch |
1.088 |
1.125 |
1.240 |
1.299 |
0.617 |
0.665 |
0.642 |
0.663 |
0.023 |
0.018 |
|
mm |
27.64 |
28.58 |
31.50 |
32.99 |
15.67 |
16.89 |
16.31 |
16.84 |
|||||
|
7/8 |
0.875 |
9 UNC |
Inch |
1.269 |
1.312 |
1.447 |
1.516 |
0.724 |
0.776 |
0.755 |
0.778 |
0.025 |
0.020 |
|
mm |
32.23 |
33.32 |
36.75 |
38.51 |
18.39 |
19.71 |
19.18 |
19.76 |
|||||
|
1 |
1.000 |
8UNC |
Inch |
1.450 |
1.500 |
1.653 |
1.732 |
0.831 |
0.887 |
0.865 |
0.890 |
0.027 |
0.022 |
|
mm |
36.83 |
38.10 |
41.99 |
43.99 |
21.11 |
22.53 |
21.97 |
22.61 |
|||||
|
1-1/8 |
1.125 |
8UN |
Inch |
1.631 |
1.688 |
1.859 |
1.949 |
0.939 |
0.999 |
0.990 |
1.015 |
0.030 |
0.025 |
|
mm |
41.43 |
42.88 |
47.22 |
49.50 |
23.85 |
25.37 |
25.15 |
25.78 |
|||||
|
1-1/4 |
1.250 |
8UN |
Inch |
1.812 |
1.875 |
2.066 |
2.165 |
1.030 |
1.094 |
1.115 |
1.140 |
0.033 |
0.028 |
|
mm |
46.02 |
47.63 |
52.48 |
54.99 |
26.16 |
27.79 |
28.32 |
28.96 |
|||||
|
1-3/8 |
1.375 |
8UN |
Inch |
1.994 |
2.062 |
2.273 |
2.382 |
1.138 |
1.206 |
1.240 |
1.265 |
0.036 |
0.031 |
|
mm |
50.65 |
52.37 |
57.73 |
60.50 |
28.91 |
30.63 |
31.50 |
32.13 |
|||||
|
1-1/2 |
1.500 |
8UN |
Inch |
2.175 |
2.250 |
2.480 |
2.598 |
1.245 |
1.317 |
1.365 |
1.390 |
0.039 |
0.034 |
|
mm |
55.25 |
57.15 |
62.99 |
65.99 |
31.62 |
33.45 |
34.67 |
35.31 |
|||||
|
1-5/8 |
1.625 |
8UN |
Inch |
2.350 |
2.430 |
2.679 |
2.805 |
1.364 |
1.416 |
1.490 |
1.515 |
0.044 |
0.038 |
|
mm |
59.69 |
61.72 |
68.05 |
71.25 |
34.65 |
35.97 |
37.85 |
38.48 |
|||||
|
1-3/4 |
1.750 |
8UN |
Inch |
2.538 |
2.625 |
2.893 |
3.031 |
1.460 |
1.540 |
1.615 |
1.640 |
0.048 |
0.041 |
|
mm |
64.47 |
66.68 |
73.48 |
76.99 |
37.08 |
39.12 |
41.02 |
41.66 |
|||||
|
1-7/8 |
1.875 |
8UN |
Inch |
2.722 |
2.813 |
3.103 |
3.247 |
1.567 |
1.651 |
1.740 |
1.765 |
0.051 |
0.044 |
|
mm |
69.14 |
71.45 |
78.82 |
82.47 |
39.80 |
41.94 |
44.20 |
44.83 |
|||||
|
2 |
2.000 |
8UN |
Inch |
2.900 |
3.000 |
3.306 |
3.464 |
1.675 |
1.763 |
1.865 |
1.890 |
0.055 |
0.047 |
|
mm |
73.66 |
76.20 |
83.97 |
87.99 |
42.55 |
44.78 |
47.37 |
48.01 |
|||||
|
2-1/4 |
2.250 |
8UN |
Inch |
3.263 |
3.375 |
3.719 |
3.897 |
1.890 |
1.986 |
2.115 |
2.140 |
0.061 |
0.052 |
|
mm |
82.88 |
85.73 |
94.46 |
98.98 |
48.01 |
50.44 |
53.72 |
54.36 |
|||||
|
2-1/2 |
2.500 |
8UN |
Inch |
3.625 |
3.750 |
4.133 |
4.330 |
2.105 |
2.209 |
2.365 |
2.390 |
0.068 |
0.058 |
|
mm |
92.08 |
95.25 |
104.98 |
109.98 |
53.47 |
56.11 |
60.07 |
60.71 |
|||||
|
2-3/4 |
2.750 |
8UN |
Inch |
3.988 |
4.125 |
4.546 |
4.763 |
2.319 |
2.431 |
2.615 |
2.640 |
0.074 |
0.064 |
|
mm |
101.30 |
104.78 |
115.47 |
120.98 |
58.90 |
61.75 |
66.42 |
67.06 |
|||||
|
3 |
3.000 |
8UN |
Inch |
4.350 |
4.500 |
4.959 |
5.196 |
2.534 |
2.654 |
2.865 |
2.890 |
0.081 |
0.070 |
| Size | Weight |
|---|---|
| M1 | 0.030 |
| M1.2 | 0.054 |
| M1.4 | 0.063 |
| M1.6 | 0.076 |
| M2 | 0.142 |
| M2.5 | 0.280 |
| M3 | 0.384 |
| M3.5 | 0.514 |
| M4 | 0.81 |
| M5 | 1.23 |
| M6 | 2.50 |
| M7 | 3.12 |
| M8 | 5.20 |
| M10 | 11.6 |
| M12 | 17.3 |
| M14 | 25.0 |
| M16 | 33.3 |
| M18 | 49.4 |
| M20 | 64.4 |
| M22 | 79 |
| M24 | 110 |
| M27 | 165 |
| M30 | 223 |
| M33 | 288 |
| M36 | 393 |
| M39 | 502 |
| M42 | 652 |
| M45 | 800 |
| M48 | 977 |
| M52 | 1220 |
| M56 | 1420 |
| M60 | 1690 |
| M64 | 1980 |
| M68 | 2300 |
| M72 | 2670 |
| M76 | 3040 |
| M80 | 3440 |
| M85 | 3930 |
| M90 | 4930 |
| M100 | 6820 |
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