Unifit Metalloys specializes in manufacturing and exporting premium ASTM A193 Grade 5 (B7) alloy-steel bolts. Quenched and tempered from chromium-molybdenum steel (AISI 4140/4142), these high-strength bolts offer excellent performance in high-temperature and high-pressure environments, commonly used with pressure vessels, valves, flanges, and heavy-duty construction. Our B7 bolts exhi... https://www.unifitmetalloys.com/alloy-steel-astm-a193-b7-bolts-manufacturer-exporter.html