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ASTM A453 Grade 660 Class C bolts are advanced high-temperature fastening marvels, forged for extreme performance in punishing industrial landscapes. Crafted from premium austenitic steel alloyed with nickel, titanium, and molybdenum, these bolts are engineered to conquer thermal shock, oxidation, and relentless stress with unwavering reliability. Built for critical reactor systems, turbines, pressure vessels, and high-temperature piping infrastructure, they thrive where ordinary bolts surrender. Their formidable strength, stability, and corrosion resilience make them indispensable in power generation, petrochemical environments, aerospace systems, and heavy-duty industrial processing where durability under scorching conditions is non-negotiable.
Produced from high-molybdenum 316 stainless steel, ASTM A193 B8M nuts offer enhanced pitting and crevice corrosion resistance along with dependable mechanical performance in aggressive and chloride-rich environments. Their austenitic chromium-nickel-molybdenum matrix delivers superior oxidation resistance and consistent structural stability across varying temperatures. Precision-machined threads ensure powerful torque retention, secure load distribution, and exceptional resistance to galling and fatigue. Designed for durability, these nuts maintain unwavering structural integrity under vibration, moisture exposure, and harsh chemical conditions — safeguarding critical assemblies with elite mechanical discipline.
Material | Dimensions | Standards | Size | Length |
ASTM A453 GR 660 CLASS C Bolts | ASME B18.2.1, B18.3 | ASTM, ASME | M 02 to M 160 | 3 mm to 200 mm |
|
Element |
Content |
|---|---|
|
Carbon |
0.08 max |
|
Manganese |
2.00 max |
|
Phosphorus, max |
0.040 max |
|
Sulfur, max |
0.030 max |
|
Silicon |
1.00 max |
|
Nickel |
24.0-27.0 |
|
Chromium |
13.5-16.0 |
|
Molybdenum |
1.00-1.50 |
|
Tungsten |
– |
|
Titanium |
1.9-2.35 |
|
Aluminum |
0.35 max |
|
Vanadium |
0.10-0.50 |
|
Boron |
0.001-0.010 |
| Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa) | 895 min |
| Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa) | 585 min |
| Elongation in 4D (El) | 15 |
| Reduction | 18 |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
ASTM A193 B8M nuts are the preferred choice for industries challenged by corrosive, marine, and chemically harsh operating environments. Ideal for securing flanges, valves, pumps, pressure vessels, and pipeline assemblies, they thrive in offshore structures, water treatment plants, pharmaceutical facilities, food-grade production lines, and chemical processing networks. Their resilience against saltwater attack and industrial chemicals ensures flawless fastening performance where failure is non-negotiable. When engineers require fastening assurance that withstands intense corrosion, vibration, moisture, and industrial stresses, B8M nuts deliver lasting performance and a secure hold that stands the test of time and environment.
At Hazlewood Fasteners, we ensure that our ASTM A 453 GR 660 Class C bolts are packaged with the utmost care to preserve their quality during transportation. Each bolt is meticulously inspected and packaged in sturdy, protective containers to prevent damage. Our packaging solutions include tamper-evident seals and clearly labeled boxes to ensure easy identification and handling. Whether in bulk or customized quantities, our packaging guarantees that the bolts reach you in pristine condition, ready for your high-demand applications.
Hazlewood Fasteners is a leading manufacturer and supplier of high-quality fasteners in Canberra, Australia, with over 8 years of experience serving global industries.
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