Stainless Steel Bolt ASME A194 B8 B8m M27 Hexagonal Nut
First approved in 1936, this specification is widely used in the petroleum and chemical industries. The ASME A194 standard covers both inch and metric fasteners. It applies to alloy steel and stainless steel bolting materials for high-temperature or high-pressure environments. This standard includes fasteners used in pressure vessels, valves, flanges, and fittings. While common coarse threads (UNC) are available, for diameters above one inch, threads are typically specified at 8 threads per inch (TPI).
A194 Grades:
| B8 |
Class 1 – Stainless steel, AISI 304, solution annealed. |
| B8M |
Class 1 – Stainless steel, AISI 316, solution annealed. |
| B8 |
Class 2 – Stainless steel, AISI 304, solution annealed and strain hardened. |
| B8M |
Class 2 – Stainless steel, AISI 316, solution annealed 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 |
| Diverse Product Range |
We can supply various types of stainless steel hardware. |
| Excellent Service |
We offer honest and sincere service with a focus on client satisfaction. |
| High Quality |
Our strict quality control ensures reliable and trusted products. |
| OEM Accepted |
Custom production is available based on your drawings or samples. |
| Fast Delivery |
We have large stock for quick delivery (3 days for stock items, 7–15 days for custom orders). |
| Low MOQ |
We can meet small order requirements efficiently. |
| Sample Charges |
Sampling Time |
| As per request |
5–7 days |
| Free for existing molds |
3 days |
| Carton Size: 25*16*25CM |
| Wooden Pallet/Case Size: 110*90*80CM |
| Color printed boxes and cartons can be customized as per customer's needs. |
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, 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 from the port yourself.
Company Profile:Hand Industrial Ltd was established in 2010 and is a professional manufacturer and supplier of stainless steel hardware. Our product range includes stainless steel bolts, thread studs, machine screws, tapping screws, and self-drilling screws in various materials such as SS 304, SS 316, SS 316L, SS 410, etc. We produce according to DIN, ANSI, BS, ISO, JIS standards and offer OEM services. 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.
We can also supply various sizes of stainless steel hex bolts, hex socket bolts, threaded nuts, hex nuts, and plain washers.Parallel Twin Screw and Barrel
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