ASTM A193 Gr.B7 Stud Bolts, API 20E BSL-1, 1-1/4 * 10 Inch

These full-threaded stud bolts are made from alloy steel and meet ASTM A193 Grade B7 for high-temperature, high-pressure bolting applications. They conform to API 20E BSL-1 standards required for critical oil and gas service. The studs measure 1-1/4 inch in diameter with 8UN thread pitch and 10 inch overall length. They carry a dual-layer coating of zinc-nickel plus Xylan 1070, which provides base corrosion resistance and a low-friction topcoat that prevents galling and ensures consistent preload during tightening.