... Steel alloy, etc.2.A hex cap screw is a cap screw with a hexagonal head, designed to ... (spanner). An ASME B18.2.1 compliant cap screw has somewhat tighter tolerances than a hex ... too large to be used where a hex cap screw is designed in.4. Specification: OEM, ... CNC lathe, automatic lathe, hand lathe, thread rolling machine, tapping drilling machine etc.8. Surface Treatment: Plating, anodizing, black ...