7/8-9 UNC-3A x 2-1/2" Socket Head Cap Screw
17-4 PH (ASTM A564 Type 630, H1100). Machined to the customer's drawing in our Houston shop.
7/8-9 UNC-3A x 2-1/2" Socket Head Cap Screw Material: 17-4PH Stainless Steel (ASTM A564 Type 630, Condition H1100) Features: Socket head design for high-torque applications, precision Class 3A threads for tight fit, heat-treated to condition H1100.
Special socket products are machined from bar where the specification allows, with the socket broached and the threads rolled, or cut where the specification or order allows, then heat treated and plated as the specification requires. Shoulder, low-head, flat-head and set-screw patterns follow ASME B18.3 unless the drawing says otherwise.
About the material: The high-strength stainless — up to 190 ksi in H900, or 115 to 135 ksi with real toughness in the H1150 conditions — for pump shafts, valve stems, subsea and aerospace fasteners. Read the 17-4 PH data page →
