Thread: Fine / Thread / Alloy Steel / Black Oxide Recommended Hex Socket Allen Key Wrench: 5/64 (Inch) Thread Diameter-Pitch: 8-36, Length: 1/2 inch Recommended Hex Socket (Allen Wrench) Size: 5/64 (Inch) Black Oxide is not a protective finish and will rust if exposed to moisture. Stainless Steel material is recommended for environments with moisture Oval point socket set screws are headless screws with an internal hexagonal drive on one end and an Oval shaped point on the other end. Oval point socket set screws are often used in applications where frequent adjustments are needed and minimal deforming of the part is required. It may be used in applications where the point contacts the mating part at an angle.