Grade B8 stainless steel bolts are high-temperature, high-pressure stainless steel bolts that meet the ASTM A193 standard. They belong to the austenitic stainless steel category and are known for excellent corrosion resistance, high-temperature strength, and oxidation resistance. They are widely used in harsh environments such as the chemical, petroleum, and power industries.
Product Parameters
|
Drive Style |
Heavy Hex Head Bolts |
|
Screw Features |
Heavy Hex |
|
System of Measurement |
Inch |
|
Thread Direction |
Right Hand |
|
Threading |
Fully threaded |
|
Thread Fit |
Class 6g |
|
Thread Spacing |
Coarse |
|
Grade/Class |
ASTM A193 B8 |
|
Material |
Stainless steel 304 |
|
Standard |
ASME B18.2.1 Table 7 |
|
Finish |
Carbide solution |
|
RoHS |
RoHS 3 (2015/863/EU) Compliant |
|
Country of Origin |
China |
Product Drawing
|
Heavy Hex Screws/Hex Bolts |
||||||||
|
ASME/ANSI B18.2.1-2010 Table7 |
||||||||
|
|
||||||||
|
d(inch) |
ds(inch) |
s((inch) |
k(inch) |
b(inch) |
||||
|
min |
max |
min |
max |
min |
max |
L≤6 |
L>6 |
|
|
3/8 |
0.36 |
0.375 |
0.669 |
0.688 |
0.226 |
0.243 |
1 |
1.25 |
|
1/2 |
0.482 |
0.5 |
0.85 |
0.875 |
0.302 |
0.323 |
1.25 |
1.5 |
|
5/8 |
0.605 |
0.625 |
1.031 |
1.062 |
0.378 |
0.403 |
1.5 |
1.75 |
|
3/4 |
0.729 |
0.75 |
1.212 |
1.25 |
0.455 |
0.483 |
1.75 |
2 |
|
7/8 |
0.852 |
0.875 |
1.394 |
1.438 |
0.531 |
0.563 |
2 |
2.25 |
|
1 |
0.976 |
1 |
1.575 |
1.625 |
0.591 |
0.627 |
2.25 |
2.5 |
|
1-1/8 |
1.098 |
1.125 |
1.756 |
1.812 |
0.658 |
0.718 |
2.5 |
2.75 |
|
1-1/4 |
1.223 |
1.25 |
1.938 |
2 |
0.749 |
0.813 |
2.75 |
3 |
|
1-3/8 |
1.345 |
1.375 |
2.119 |
2.188 |
0.81 |
0.878 |
3 |
3.25 |
|
1-1/2 |
1.47 |
1.5 |
2.3 |
2.375 |
0.902 |
0.974 |
3.25 |
3.5 |
|
1-5/8 |
1.591 |
1.625 |
2.481 |
2.562 |
0.962 |
1.038 |
3.5 |
3.75 |
|
1-3/4 |
1.716 |
1.75 |
2.662 |
2.75 |
1.054 |
1.134 |
3.75 |
4 |
|
1-7/8 |
1.839 |
1.875 |
2.844 |
2.938 |
1.114 |
1.198 |
4 |
4.25 |
|
2 |
1.964 |
2 |
3.025 |
3.125 |
1.175 |
1.263 |
4.25 |
4.5 |
|
2-1/4 |
2.214 |
2.25 |
3.388 |
3.5 |
1.327 |
1.423 |
/ |
5 |
|
2-1/2 |
2.461 |
2.5 |
3.75 |
3.875 |
1.479 |
1.583 |
/ |
5.5 |
|
2-3/4 |
2.711 |
2.75 |
4.112 |
4.25 |
1.632 |
1.744 |
/ |
6 |
|
3 |
2.961 |
3 |
4.475 |
4.625 |
1.815 |
1.935 |
/ |
6.5 |
|
3-1/4 |
3.21 |
3.25 |
4.838 |
5 |
1.998 |
2.126 |
/ |
7 |
|
3-1/2 |
3.461 |
3.5 |
5.2 |
5.375 |
2.12 |
2.256 |
/ |
7.5 |
|
3-3/4 |
3.7109 |
3.75 |
5.562 |
5.75 |
2.303 |
2.447 |
/ |
8 |
|
4 |
3.9609 |
4 |
5.925 |
6.125 |
2.424 |
2.576 |
/ |
8.5 |
|
4-1/4 |
4.2228 |
4.25 |
6.288 |
6.5 |
2.608 |
2.768 |
/ |
9 |
|
4-1/2 |
4.4727 |
4.5 |
6.65 |
6.875 |
2.728 |
2.896 |
/ |
9.5 |
|
4-3/4 |
4.7227 |
4.75 |
7.012 |
7.25 |
2.912 |
3.088 |
/ |
10 |
|
5 |
4.9726 |
5 |
7.375 |
7.625 |
3.033 |
3.127 |
/ |
10.5 |
|
5-1/4 |
5.2226 |
5.25 |
7.738 |
8 |
3.216 |
3.408 |
/ |
11 |
|
5-1/2 |
5.4726 |
5.5 |
8.1 |
8.375 |
3.338 |
3.538 |
/ |
11.5 |
|
5-3/4 |
5.7225 |
5.75 |
8.462 |
8.75 |
3.521 |
3.729 |
/ |
12 |
|
6 |
5.9725 |
6 |
8.825 |
9.125 |
3.642 |
3.858 |
/ |
12.5 |
Advantages of Grade B8 Stainless Steel Bolts
1. Excellent Corrosion Resistance:
Their chromium and nickel content gives them excellent corrosion resistance in various environments, including exposure to moisture, chemicals, and acidic conditions.
2. High Strength:
Grade B8 bolts can withstand large tensile forces without failure, making them ideal for high-stress or high-load applications.
3. Durability in Harsh Conditions:
These bolts perform well in high-temperature and high-pressure environments, making them widely used in industrial and manufacturing sectors.
4. Non-magnetic:
Due to their non-magnetic properties, Grade B8 bolts have an advantage in critical environments where magnetism may cause issues (for example, in certain electronic equipment or sensitive devices).
5. Wide Application:
Due to their versatility, Grade B8 bolts are widely used across many different industries, including food processing, pharmaceuticals, marine applications, and power generation.
Applications
Chemical and petrochemical industries: Used for connecting pipelines, reactors, valves, and other equipment, resisting corrosion from acidic/alkaline solutions and organic media.
Power industry: Connecting high-temperature pipelines and boiler components in nuclear and thermal power plants, withstanding high-temperature steam and oxidizing environments.
Food and pharmaceutical equipment: Due to the hygienic properties of 304 stainless steel, suitable for securing equipment that comes into contact with food and medicines.
Marine engineering: In coastal or shipboard equipment, resisting salt spray corrosion of fasteners.
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