A4 5/8-11 UNC X 2.1/4" HEX BOLT ASME B18.2.1 316 ST/ST is a premium stainless steel fastener, designed for durability and strength. Manufactured to industry standards, it ensures precision and secure fastening. Made from A4 316 stainless steel, it provides excellent corrosion resistance for harsh environments. Whether used in construction, marine engineering, or industrial settings, it guarantees long-term performance. The robust design allows for stable installation and secure tightening.