
ASME SA 563 Coupling and hex nut manufacturer, check astm a563 grade a nuts Specification and Equivalent here
ASTM A563 Nuts come under the specification for carbon steel and alloy steel nuts that are intended for general, mechanical and structural applications. Viha Steel & Forging is a manufacturer of the different grades of nuts such as the astm a563 dh heavy hex nuts. The hex nuts are easy to install with tools and therefore it is one of the most commonly used type of nuts.
There are different grades as A, B, C, D, DH, C3 and DH3. The astm a563 hex nuts can come in any of these grades. The different grades specify the carbon steel, weathering steel, quenched and tempered steel, hex and heavy hex types of material and products. Different grades of the astm a563 square nuts also come with different tensile strengths. The sizes range from ¼ inches to 4 inches. The hex nuts range up to 1 ½ inches and the heavy hex nuts range up to 4 inches. The nuts astm a563 grade a have minimum tensile strength up to 90ksi as plain.
When galvanized, the proof load is 68ksi. The hardness of this grade of nuts ranges from 116 to 302 HBN. The DH3 grade has tensile strength up to 175ksi and hardness ranging from 248 to 352 HBN. The astm a563 nuts specifications cover the different mechanical, chemical properties with heat treatments. The chemical composition of these nuts has carbon, manganese, phosphors and sulfur in the composition. The proportions range differently. The A563 Grade A Nut has 0.55% carbon, 0.12% phosphors and 0.15% sulfur. As a leading manufacturer and supplier, we produce the nuts in all types. Please feel free to inquire us on your needs on the different types of nuts such as the ASTM A563m and the respective prices.
A | Carbon steel, hex or heavy hex |
---|---|
B | Carbon steel, hex or heavy hex |
C | Carbon steel, quenched and tempered, heavy hex |
D | Carbon steel, quenched and tempered, heavy hex |
DH | Carbon steel, quenched and tempered, heavy hex |
C3 | Weathering steel, quenched and tempered, heavy hex |
DH3 | Weathering steel, quenched and tempered, heavy hex |
Standards |
Designation |
---|---|
ASTM | F563 |
ASTM F563 Nuts Coatings | Cadmium, Black Oxide, Teflon, Galvanized, Zinc, Xylan, Others Upon Request |
Delivery time | custom product will according to special requirement, Regular product is about 7-15 days |
Dimensions |
ASME B18.3, B18.2.1 |
Product Origin |
Made in India |
Melt Origin |
South America/East Europe/Japan/Korea |
Threads Configuration |
B1.13M 6h Metric Coarse Threads and ASME B1.1 2A/3A Inch Unified Threads |
Additional Certifications |
Merkblatt AD 2000 W2 Certified, PED 97/23/EC Certified |
Certification |
Dual Certified As per ASME & ASTM Codes |
Mandatory Requirements |
Free from Radioactive & Mercury Contamination |
Samples | Yes |
Additional Requirements |
NACE MR0175 / MR0103 /ISO 15156 Compliance |
Payment Terms | Western Union, T/T, Paypal, Trade Assurance 30% deposit & balance before shipping or L/C |
Grade Identification Marking | Specification | Material | Nominal Size, In. | Proof Load Stress, ksi | Hardness Rockwell | See Note | |
---|---|---|---|---|---|---|---|
Min | Max | ||||||
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ASTM A563 Grade O | Carbon Steel | 1/4 - 1-1/2 | 69 | B55 | C32 | 2,3 |
ASTM A563 Grade A | Carbon Steel | 1/4 - 1-1/2 | 90 | B68 | C32 | 2,3 | |
ASTM A563 Grade B | Carbon Steel | 1/4 - 1 | 120 | B69 | C32 | 2,3 | |
>1 - 1-1/2 | 105 | ||||||
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ASTM A563 Grade C | Carbon Steel, may be Quenched and Tempered | 1/4 - 4 | 144 | B78 | C38 | 4 |
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ASTM A563 Grade C3 | Atmospheric Corrosion Resistant Steel, may be Quenched and Tempered | 1/4 - 4 | 144 | B78 | 38 | 4,6 |
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ASTM A563 Grade D | Carbon Steel, may be Quenched and Tempered | 1/4 - 4 | 150 | B84 | C38 | 5 |
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ASTM A563 Grade DH | Carbon Steel, Quenched and Tempered | 1/4 - 4 | 175 | C24 | C38 | 5 |
![]() |
ASTM A563 Grade DH3 | Atmospheric Corrosion Resistant Steel, Quenched and Tempered | 1/4 - 4 | 175 | C24 | C38 | 4,6 |
NOTES:
|




ASTM A563 Nuts |
Price |
ASTM A563 grade C hex heavy nut |
US$ 900.00-US$ 1,400.00 / Ton |
Black ASTM A563 Gr DH Heavy Hex Nut M64 |
US$ 0.08-US$ 1.00 / Piece |
Grade DH a563 heavy hex nut teflon nut |
US$ 0.01-US$ 0.50 / Piece 1 Piece Min. Order |
Your need for A563 Dh Heavy Hex Nuts of standard size ends here, We provide the best quality range of Grade F563 Lock nut
Grade | Style | Size, in. | Proof Load, ksi | Hardness, HBN | |
---|---|---|---|---|---|
Plain | Galvanized | ||||
A | Hex | 1/4 - 1-1/2 | 90 | 68 | 116 - 302 |
Heavy Hex | 1/4 - 4 | 100 | 75 | 116 - 302 | |
B | Heavy Hex | 1/4 - 1 | 133 | 100 | 121 - 302 |
Heavy Hex | 1-1/8 - 1-1/2 | 116 | 87 | 121 - 302 | |
C / C3 | Heavy Hex | 1/4 - 4 | 144 | 144 | 143 - 352 |
D | Heavy Hex | 1/4 - 4 | 150 | 150 | 248 - 352 |
DH / DH3 | Heavy Hex | 1/4 - 4 | 175 | 150 | 248 - 352 |
For UNC, 8UN, 6UN, and Coarse Pitch Threads |
Element | Grades O, A, B, C | D** | DH** |
---|---|---|---|
Carbon | 0.55% max | 0.55% max | 0.20 - 0.55% |
Manganese, min | 0.30% | 0.60% | |
Phosphorus, max | 0.12% | 0.04% | 0.04% |
Sulfur, max | 0.15%* | 0.05% | 0.05% |
* For grades O, A and B a sulfur content of 0.23% max is acceptable with the purchasers approval | |||
** For grades D and DH a sulfur content of 0.05 - 0.15% is acceptable provided the manganese is 1.35% min |
Element | Classes for Grade C3* | DH3 | ||||||
---|---|---|---|---|---|---|---|---|
A | B | C | D | E | F | N | ||
Carbon | 0.33 - 0.40% | 0.38 - 0.48% | 0.15 - 0.25% | 0.15 - 0.25% | 0.20 - 0.25% | 0.20 - 0.25% | 0.20 - 0.53% | |
Manganese | 0.90 - 1.20% | 0.70 - 0.90% | 0.80 - 1.35% | 0.40 - 1.20% | 0.60 - 1.00% | 0.90 - 1.20% | 0.40% min | |
Phosphorus | 0.040% max | 0.06 - 0.12% | 0.035% max | 0.040% max | 0.040% max | 0.040% max | 0.07 - 0.15% | 0.046% max |
Sulfur, max | 0.050% | 0.050% | 0.040% | 0.050% | 0.040% | 0.040% | 0.050% | 0.050% |
Silicon | 0.15 - 0.35% | 0.30 - 0.50% | 0.15 - 0.35% | 0.25 - 0.50% | 0.15 - 0.35% | 0.15 - 0.35% | 0.20 - 0.90% | |
Copper | 0.25 - 0.45% | 0.20 - 0.40% | 0.20 - 0.50% | 0.30 - 0.50% | 0.30 - 0.60% | 0.20 - 0.40% | 0.25 - 0.55% | 0.20% min |
Nickel | 0.25 - 0.45% | 0.50 - 0.80% | 0.25 - 0.50% | 0.50 - 0.80% | 0.30 - 0.60% | 0.20 - 0.40% | 1.00% max | 0.20% min** |
Chromium | 0.45 - 0.65% | 0.50 - 0.75% | 0.30 - 0.50% | 0.50 - 1.00% | 0.60 - 0.90% | 0.45 - 0.65% | 0.30 - 1.25% | 0.45% min |
Vanadium | 0.020% min | |||||||
Molybdenum | 0.06% max | 0.10% max | 0.15% min** | |||||
Titanium | 0.05% max | |||||||
* Selection of a class shall be at the option of the manufacturer | ||||||||
** Nickel or Molybdenum may be used. |
Nut Size (mm) |
Diameter* (mm) |
Height (mm) |
||
---|---|---|---|---|
Hex Nut |
Jam Nut |
Nylock Nut |
||
2 |
4 |
1.6 |
1.2 |
- |
2.5 |
5 |
2 |
1.6 |
- |
3 |
5.5 |
2.4 |
1.8 |
4 |
4 |
7 |
3.2 |
2.2 |
5 |
5 |
8 |
4 |
2.7 |
5 |
6 |
10 |
5 |
3.2 |
6 |
7 |
11 |
5.5 |
3.5 |
- |
8 |
13 |
6.5 |
4 |
8 |
10 |
17 |
8 |
5 |
10 |
12 |
19 |
10 |
6 |
12 |
14 |
22 |
11 |
7 |
14 |
16 |
24 |
13 |
8 |
16 |
18 |
27 |
15 |
9 |
18.5 |
20 |
30 |
16 |
10 |
20 |
* This is the diameter across the flats. It is also the size of wrench to use. |
Check astm a563 grade dh equivalent, A563 Nut Dimensions and updated price online

Nominal Size or Basic Major Thread Diameter |
F |
G |
H |
||||||
Width Across Flats |
Width Across Corners |
Thickness |
|||||||
Basic |
Max |
Min |
Max |
Min |
Basic |
Max |
Min |
||
1/4 |
.2500 |
1/2 |
.500 |
.488 |
.577 |
.556 |
15/64 |
.250 |
.218 |
5/16 |
.3125 |
9/16 |
.562 |
.546 |
.650 |
.622 |
19/64 |
.314 |
.280 |
3/8 |
.3750 |
11/16 |
.688 |
.669 |
.794 |
.763 |
23/64 |
.377 |
.341 |
7/16 |
.4375 |
3/4 |
.750 |
.728 |
.866 |
.830 |
27/64 |
.441 |
.403 |
1/2 |
.5000 |
7/8 |
.875 |
.850 |
1.010 |
.969 |
31/64 |
.504 |
.464 |
9/16 |
.5625 |
15/16 |
.938 |
.909 |
1.083 |
1.037 |
35/64 |
.568 |
.526 |
5/8 |
.6250 |
1-1/16 |
1.062 |
1.031 |
1.227 |
1.175 |
39/64 |
.631 |
.587 |
3/4 |
.7500 |
1-1/4 |
1.250 |
1.212 |
1.443 |
1.382 |
47/64 |
.758 |
.710 |
7/8 |
.8750 |
1-7/16 |
1.438 |
1.394 |
1.660 |
1.589 |
55/64 |
.885 |
.833 |
1 |
1.0000 |
1-5/8 |
1.325 |
1.575 |
1.876 |
1.796 |
63/64 |
1.012 |
.956 |
1-1/8 |
1.1250 |
1-13/16 |
1.812 |
1.756 |
2.093 |
2.002 |
1-7/64 |
1.139 |
1.079 |
1-1/4 |
1.2500 |
2 |
2.000 |
1.938 |
2.309 |
2.209 |
1-7/32 |
1.251 |
1.187 |
1-3/8 |
1.3750 |
2-3/16 |
2.188 |
2.119 |
2.526 |
2.416 |
1-11/32 |
1.378 |
1.460 |
1-1/2 |
1.5000 |
2-3/8 |
2.375 |
2.300 |
2.742 |
2.622 |
1-15/32 |
1.505 |
1.433 |
1-5/8 |
1.6250 |
2-9/16 |
2.562 |
2.481 |
2.959 |
2.828 |
1-19/32 |
1.632 |
1.556 |
1-3/4 |
1.7500 |
2-3/4 |
2.750 |
2.662 |
3.175 |
3.035 |
1-23/32 |
1.759 |
1.679 |
2 |
2.0000 |
3-1/8 |
3.125 |
3.025 |
3.608 |
3.449 |
1-31/32 |
2.013 |
1.925 |
2-1/4 |
2.2500 |
3-1/2 |
3.500 |
3.388 |
4.041 |
3.862 |
2-13/64 |
2.251 |
2.155 |
2-1/2 |
2.5000 |
3-7/8 |
3.875 |
3.750 |
4.474 |
4.275 |
2-29/64 |
2.505 |
2.401 |
2-3/4 |
2.7500 |
4-1/4 |
4.250 |
4.112 |
4.907 |
4.688 |
2-45/64 |
2.759 |
2.647 |
3 |
3.0000 |
4-5/8 |
4.625 |
4.475 |
5.340 |
5.102 |
2-61/64 |
3.013 |
2.893 |
3-1/4 |
3.2500 |
5 |
5.000 |
4.838 |
5.774 |
5.515 |
3-3/16 |
3.252 |
3.124 |
3-1/2 |
3.5000 |
5-3/8 |
5.375 |
5.200 |
6.207 |
5.928 |
3-7/16 |
3.506 |
3.370 |
3-3/4 |
3.7500 |
5-3/4 |
5.750 |
5.562 |
6.640 |
6.341 |
3-11/16 |
3.670 |
3.616 |
4 |
4.0000 |
6-1/8 |
6.125 |
5.925 |
7.073 |
6.755 |
3-15/16 |
4.014 |
3.862 |
For Nuts: Hot Dipped Galvanized per Specification F2329
Nominal Nut Size, in. and Pitch | Diametral Allowance, in. | Pitch Diameter | |
---|---|---|---|
Min | Max | ||
0.250 - 20 | 0.016 | 0.2335 | 0.2384 |
0.312 - 18 | 0.017 | 0.2934 | 0.2987 |
0.375 - 16 | 0.017 | 0.3514 | 0.3571 |
0.437 - 14 | 0.018 | 0.4091 | 0.4152 |
0.500 - 13 | 0.018 | 0.4680 | 0.4745 |
0.562 - 12 | 0.020 | 0.5284 | 0.5352 |
0.625 - 11 | 0.020 | 0.5860 | 0.5932 |
0.750 - 10 | 0.020 | 0.7050 | 0.7127 |
0.875 - 9 | 0.022 | 0.8248 | 0.8330 |
1.000 - 8 | 0.024 | 0.9428 | 0.9516 |
1.125 - 8 | 0.024 | 1.0678 | 1.0768 |
1.125 - 7 | 0.024 | 1.0562 | 1.0656 |
1.250 - 8 | 0.024 | 1.1928 | 1.2020 |
1.250 - 7 | 0.024 | 1.1812 | 1.1908 |
1.375 - 8 | 0.027 | 1.3208 | 1.3301 |
1.375 - 6 | 0.027 | 1.2937 | 1.3041 |
1.500 - 8 | 0.027 | 1.4458 | 1.4553 |
1.500 - 6 | 0.027 | 1.4187 | 1.4292 |
1.750 - 5 | 0.050 | 1.6701 | 1.6817 |
2.000 - 4.5 | 0.050 | 1.9057 | 1.9181 |
2.250 - 4.5 | 0.050 | 2.1557 | 2.1683 |
2.500 - 4 | 0.050 | 2.3876 | 2.4011 |
2.750 - 4 | 0.050 | 2.6376 | 2.6513 |
3.000 - 4 | 0.050 | 2.8876 | 2.9015 |
3.250 - 4 | 0.050 | 3.1376 | 3.1517 |
3.500 - 4 | 0.050 | 3.3876 | 3.4019 |
3.750 - 4 | 0.050 | 3.6376 | 3.6521 |
4.000 - 4 | 0.050 | 3.8876 | 3.9023 |
Indonesia, Dammam -KSA, Philippines, Belgium | A563 M6 M8 M10 M12 M16 2h Hexagon Heavy Nut |
France, Qatar, Europe, Thailand | A563 Heavy Hex Nuts |
Germany, Czechia, Thailand, Malaysia | A563 Grade 8.8 10.9 HDG Heavy Hex Nut |
USA, Malaysia, Bangladesh, Finland | A563 High Strength Alloy Steel Hex Nut |
Brazil, Saudi Arabia (KSA), South Africa, Kuwait | ASME/ANSI B18.2.2 Heavy Hex Nut A563-Dh Zinc Plated |
Bahrain, South Africa, Singapore | Fastener A563 Grade DH Hex Heavy Nut |
Australia, Philippines, UK, Nigeria | A563 Heavy Hex Nuts M8-1.5 |
Malaysia, Oman, Hong Kong | A563 Gr C, Dh, A194 2h Finish Hex Nuts Carbon Steel Nut |
Italy, Chile, Iran, Singapore | -A563 Hexagon Head Heavy Nut Black |
Turkey, United Arab Emirates (UAE), Norway | Nut A563 10s Dacromet |
Malaysia, Netherlands, Russia | hexagonal Head High Strength Nuts A563 Dh Zinc Plated |
Spain, Egypt, Mexico, UK, Singapore | High Strength ASTM A563 Black Hex Nut |

**All measurements in millimeters**
Nominal Size or Basic Major Thread Diameter |
F |
G |
H |
||||||
Width Across Flats |
Width Across Corners |
Thickness |
|||||||
Basic |
Max |
Min |
Max |
Min |
Basic |
Max |
Min |
||
1/4 |
.2500 |
7/16 |
.438 |
.428 |
.505 |
.488 |
7/32 |
.226 |
.212 |
5/16 |
.3125 |
1/2 |
.500 |
.489 |
.577 |
.557 |
17/64 |
.273 |
.258 |
3/8 |
.3750 |
9/16 |
.562 |
.551 |
.650 |
.628 |
21/64 |
.337 |
.479 |
7/16 |
.4375 |
11/16 |
.688 |
.675 |
.794 |
.768 |
3/8 |
.385 |
.365 |
1/2 |
.5000 |
3/4 |
.750 |
.736 |
.866 |
.840 |
7/16 |
.448 |
.427 |
9/16 |
.5625 |
7/8 |
.875 |
.861 |
1.010 |
.982 |
31/64 |
.496 |
.473 |
5/8 |
.6250 |
15/16 |
.938 |
.922 |
1.083 |
1.051 |
35/64 |
.559 |
.535 |
3/4 |
.7500 |
1-1/8 |
1.125 |
1.088 |
1.299 |
1.240 |
41/64 |
.665 |
.617 |
7/8 |
.8750 |
1-5/16 |
1.312 |
1.269 |
1.516 |
1.447 |
3/4 |
.776 |
.724 |
1 |
1.0000 |
1-1/2 |
1.500 |
1.450 |
1.732 |
1.653 |
55/64 |
.887 |
.831 |
1-1/8 |
1.1250 |
1-11/16 |
1.688 |
1.631 |
1.949 |
1.859 |
31/32 |
.999 |
.939 |
1-3/8 |
1.3750 |
2-1/16 |
2.062 |
1.994 |
2.382 |
2.273 |
1-11/64 |
1.206 |
1.138 |
1-1/2 |
1.500 |
2-1/4 |
2.250 |
2.175 |
2.598 |
2.480 |
1-9/32 |
1.ASTM A194 GR. 8 |
1.245 |
1-5/8 |
1.6250 |
2-7/16 |
2.438 |
2.356 |
2.815 |
2.686 |
1-25/64 |
1.429 |
1.353 |
1-3/4 |
1.7500 |
2-5/8 |
2.625 |
2.538 |
3.031 |
2.893 |
1-1/2 |
1.540 |
1.460 |
2 |
2.0000 |
3 |
3.000 |
2.900 |
3.464 |
3.306 |
1-23/32 |
1.763 |
1.675 |
2-1/4 |
2.2500 |
3-3/8 |
3.375 |
3.263 |
3.897 |
3.719 |
1-15/16 |
1.986 |
1.890 |
2-1/2 |
2.5000 |
3-3/4 |
3.750 |
3.625 |
4.330 |
4.133 |
2-5/32 |
2.209 |
2.105 |
2-3/4 |
2.7500 |
4-1/8 |
4.125 |
3.988 |
4.763 |
4.546 |
2-3/8 |
2.431 |
2.319 |
get astm a563 anchor bolt and Lock Nuts Chemical Composition and mechanical properties
A563 Coupling Nuts |
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F563 Hex Nuts |
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SS F563 Heavy Hex Nuts |
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F563 Dome Nuts |
ISO Approved A563 Eye Nuts |
F563 Nuts |
A563 Hex Nuts |
F563 T But |
F563 Nylock Insert Nuts |
A563 Nuts |
SF563 Nuts |
Stainless Steel F563 Panel Nuts |
F563 Heavy Hex Nuts |
F563 Locking Nuts |
F563 Lock Nuts |
F563 Panel Nuts |
F563 Stainless Steel Washer |
F563 Acorn Nuts |
Stainless Steel F563 Wing Nuts |
A563 Panel Nuts |
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