Stainless Steel ASME A194 B8 B8m Hex Nut with Bolt
Originally introduced in 1936, the ASME A194 specification is widely used in the oil and chemical industries. It covers both inch and metric fasteners, and it's particularly suited for high-temperature or high-pressure environments. This standard includes nuts, bolts, and other fastening components used in pressure vessels, valves, flanges, and fittings. While most threads are available in national coarse (UNC) pitches, for diameters above one inch, the thread pitch is typically specified at 8 threads per inch.
A194 Grades
| B8 |
Class 1 - Stainless steel, AISI 304, solution treated. |
| B8M |
Class 1 - Stainless steel, AISI 316, solution treated. |
| B8 |
Class 2 - Stainless steel, AISI 304, solution treated and strain hardened. |
| B8M |
Class 2 - Stainless steel, AISI 316, solution treated and strain hardened. |
| Grade |
Size |
Tensile ksi, min |
Yield, ksi, min |
Elong, %, min |
RA % min |
HBW |
HRC |
| B8 Class 1 |
All |
75 |
30 |
30 |
50 |
223 max |
35 max |
| B8M Class 1 |
All |
75 |
30 |
30 |
50 |
223 max |
96 max |
| B8 Class 2 |
Up to 3/4 |
125 |
100 |
12 |
35 |
321 max |
35 max |
| 7/8 - 1 |
115 |
80 |
15 |
35 |
| 1-1/8 - 1-1/4 |
105 |
65 |
20 |
35 |
| 1-3/8 - 1-1/2 |
100 |
50 |
28 |
45 |
| B8M Class 2 |
Up to 3/4 |
110 |
95 |
15 |
45 |
321 max |
35 max |
| 7/8 - 1 |
100 |
80 |
20 |
45 |
| 1-1/8 - 1-1/4 |
95 |
65 |
25 |
45 |
| 1-3/8 - 1-1/2 |
90 |
50 |
30 |
45 |
| Element |
B8 (AISI 304) |
B8M (AISI 316) |
| Carbon |
0.08% max |
0.08% max |
| Manganese |
2.00% max |
2.00% max |
| Phosphorus, max |
0.045% |
0.045% |
| Sulfur, max |
0.030% |
0.030% |
| Silicon |
1.00% max |
1.00% max |
| Chromium |
18.0 - 20.0% |
16.0 - 18.0% |
| Nickel |
8.0 - 11.0% |
10.0 - 14.0% |
| Molybdenum |
 |
2.00 - 3.00% |
| Bolt Grade |
Nuts |
Washers |
| B8 Class 1 |
A194 Grade 8 |
SS304 |
| B8M Class 1 |
A194 Grade 8M |
SS316 |
| B8 Class 2 |
A194 Grade 8 |
SS304 |
| B8M Class 2 |
A194 Grade 8M |
SS316 |
| Wide Product Range |
We can supply all types of stainless steel hardware as per your needs. |
| Excellent Service |
We provide honest and professional service with a strong commitment to client satisfaction. |
| High Quality |
Our strict quality control system ensures top-quality products that meet international standards. |
| OEM Available |
Custom production based on your drawings or samples is possible. |
| Fast Delivery |
We have large stock, with 3 days for stock items and 7–15 days for custom orders. |
| Low MOQ |
Flexible minimum order quantities to suit your business requirements. |
| Sample Charge |
Sampling Time |
| As per your request |
5–7 days |
| Free for Existing Mold |
3 days |
| Carton Size: 25*16*25CM |
| Wooden Pallet/Case Size: 110*90*80CM |
| Color Printed Boxes & Cartons can be customized according to your preferences. |
Delivery Options:
| By Express |
1kg–50kg |
| By Air |
50kg–500kg |
| By Sea |
500kg or more |
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By Express (FedEx, UPS, DHL, TNT, EMS, etc.)
--- Advantage: Fast delivery (about 7–10 days), door-to-door service
--- Disadvantage: More expensive
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By Air Transport
--- Advantage: Faster than sea transport (about 8–12 days), cheaper than express
--- Disadvantage: You need to collect the goods from the airport yourself
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By Sea (Ocean) Transport
--- Advantage: Most cost-effective
Disadvantage: Slower, you need to collect the goods from the destination port yourself.
Company Information:Hand Industrial Ltd was established in 2010 and has become a professional manufacturer and supplier of stainless steel hardware. Our product range includes stainless steel bolts, threaded studs, machine screws, tapping screws, and self-drilling screws in various materials such as SS 304, SS 316, SS 316L, and SS 410. We produce according to DIN, ANSI, BS, ISO, JIS standards, and OEM services are available. Our products are popular in Europe, Australia, North America, the Middle East, Southeast Asia, and some African countries.
We can supply different sizes of super alloy steel hex bolts, hex socket bolts, threaded studs, hex nuts, and plain washers.
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