
SA 194 Gr 7 Washer manufacturer in India
ASTM A194 Grade 7 Nuts belong to a specification for chromium molybdenum alloy steel that are heat treated and internally threaded. Viha Steel & Forging is a leading manufacturer and supplier of the different grades of the ASME SA 194 Gr 7 Hex Nut and others. The hex nuts are very common in this grade as they are much suitable for high torque tightening. There are different grades in the A194 specification such as AISI 4140, 4142, 4245 and 4145H. The ASTM A194 Gr 7 Heavy Hex Nuts are produced with hot forging, cold forging and machining from heat treated bar stock.
The material is made up of carbon, manganese, phosphorus, sulfur, silicon, chromium and molybdenum. The different fasteners such as the ASTM A194 Grade 7 Washer and others are quenched and tempered at 595 degrees Celsius and the Brinell hardness increases up to 248 to 327BHN. The fasteners sizes range from ¼ inches to 1 ½ inches with threads ranging from 8 threads per inch to 20 threads per inches.
The SA 194 Grade 7 Nuts range from M6 to M100 with tensile strength ranging from 150ksi to 175ksi. The application of these fasteners is seen in the oil and gas, petroleum, chemical, pharmaceutical and power generation industries. The astm a194 grade 7l nuts can also be applied in coolers, heaters, heat exchangers, condensers and in boiler grade applications. As a leading manufacturer of the different types of these fasteners, we can supply any of your order requirements. Please feel free to contact us for the different fasteners such as the SA194 Grade 7 Flat Washer and the prices.
ASTM A194 Grade 7 Nuts |
Price |
Factory price astm a194 grade 7 heavy hex nut |
US$ 0.20-US$ 20.00 / Piece |
Stock ASTM A194 GR 7 Heavy Hex Bolt |
US$ 0.01-US$ 1.00 / Piece |
astm a194 gr 7 heavy double hex nut m74 |
US$ 0.971-US$ 1.44 / Kilogram |
Grade & Type | Brinell Hardness | Rockwell Hardness | |
---|---|---|---|
C Scale | B Scale | ||
7 | 248-327 | 24 - 35 | - |
Nominal Size, inch | Threads per inch | Stress Area inch | Proof Load, lbf | |
---|---|---|---|---|
Grade 2H, 4, 7, 16 | ||||
Heavy Hex | Hex | |||
1/4" | 20 | 0.0316 | 4770 | 4300 |
5/16" | 18 | 0.0524 | 7860 | 7070 |
3/8" | 16 | 0.0774 | 11620 | 10460 |
7/16" | 14 | 0.1063 | 15940 | 14350 |
1/2" | 13 | 0.1419 | 21280 | 19160 |
9/16" | 12 | 0.1820 | 27300 | 24570 |
5/8" | 11 | 0.2260 | 33900 | 30510 |
3/4" | 10 | 0.3340 | 50100 | 45090 |
7/8" | 9 | 0.4620 | 69300 | 62370 |
1" | 8 | 0.606 | 90900 | 81810 |
1 1/8" | 8 | 0.7900 | 118500 | 106700 |
1 1/4" | 8 | 1.0000 | 150000 | 135000 |
1 3/8" | 8 | 1.2330 | 185000 | 166500 |
1 1/2" | 8 | 1.492 | 223800 | 201400 |
Grade Type | Hot Forged or Cold Punched Nuts | Nuts Machined from Bar Stock |
---|---|---|
7 | 7 | 7B |

**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 |
Standards |
Designation |
---|---|
ASTM |
A194 Grade 7: 410 Stainless Steel, Quenched and Tempered.. |
Dimensions |
ASME B18.2.1, B18.3 |
---|---|
Melt Origin |
South America/East Europe/Japan/Korea/ |
Product Origin |
Made in India |
Threads Configuration |
ASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads |
Certification |
Dual Certified As per ASTM & ASME Codes |
Additional Certifications |
PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
Mandatory Requirements |
Free from Mercury & Radioactive Contamination |
Additional Requirements |
NACE MR0103 / MR0175 / ISO 15156 Compliance |
We Keep Bulk Stock of astm a194 grade 7l nuts at our stockyard, contact us to request a quote
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. |
Best Price & Fast Delivery of A194 Grade 7 Material, check SA 194 Grade 7 Nuts dimensions
ASTM A194 Gr 7 Nylock Insert Nut |
ASTM A194 Grade 7 Nuts |
ASTM A 194 Coupling Nut |
ASTM A194 Square Nut |
ASTM A194 Grade 7 Flange Nuts |
A194 Grade 7 Hex Nut |
SS Gr.7 Lock Nut |
SS Gr.7 Heavy Hex Nuts |
Stainless Steel Gr.7 T Nuts |
ASTM A 194 Gr.7 Dome Nut |
ISO Approved ASTM A194 Eye Nut |
ASTM A 194 Gr.7 Nuts |
ASTM A 194 Hex Nuts |
A194 Grade 7 T But |
ASTM A194 grade 7 temperature |
Gr.7 Stainless Steel Washer |
SA194 Nuts |
Stainless Steel Gr.7 Panel Nut |
ASTM A 194 Gr.7 Heavy Hex Nuts |
ASTM A194 Locking Nuts |
Stainless Steel Gr.7 Wing Nuts |
ASTM A194 Grade 7 Panel Nut |
ASTM A 194 Gr.7 Lock Nuts |
Gr.7 Panel Nuts |

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 |
Buy High-Grade Quality from ASTM A194 Gr 7 Nuts Suppliers, view Grade 7 Nuts Specification
Nominal Size, In. | Temperature °F | Proof Load Stress, ksi | Hardness Rockwell | Material |
1/4 - 4 | 1100 | 80 | C38 | Medium Carbon Alloy Steel, Quenched and Tempered |
Grade | Material | UNS Number |
C, % | Mn, % | Ph, % | S, % | Si, % | Cr, % | Ni, % | Mo, % | Ti, % | Cb & Ta, % | N, % | Other Elements, % |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
7 | Type 4140, 4142, 4145, 4140H, 4142H, 4145H | 0.37-0.49 | 0.65-1.10 | 0.035 | 0.040 | 0.15-0.35 | 0.75-1.2 | - | 0.15-0.25 | - | - | - | - |
Specific size are available in SA194 Grade 7 Flat Washer at dealer price in India