The 1CBLU is a blue press-fit cap designed for use with 2.8 mm square shaft switches. It features a compact design with dimensions of 9.90 mm × 9.40 mm × 4.50 mm (0.390 in × 0.370 in × 0.177 in), manufactured from UL94VO material for flame resistance and durability. The cap is colored blue (Pantone 2925C) and is engineered to press-fit securely onto the 2.8 mm square shaft with a general tolerance of ±0.15 mm. This component is commonly used in control panels, industrial equipment, and consumer electronics where a standardized, reliable switch cap interface is required.