Unifit Metalloys offers premium ASTM A453 Grade 660B bolts, manufactured to stringent standards for high-temperature and high-pressure applications. These Inconel-based fasteners provide exceptional mechanical strength—with a minimum tensile strength of 130 ksi and yield strength of 85 ksi—and are stress-rupture tested for 100 hours at 650 °C. Ideal for pressure vessels, valves, and c... https://www.unifitmetalloys.com/fasteners-manufacturer-exporter.html