AT06-6S-CAP is a protective end cap accessory designed for the Amphenol Sine Systems AT Series 6-position connectors. Based on the AT Series product line documentation, this cap provides environmental protection for unmated connector ends, maintaining the IP67, IP68, and IP69K ingress protection ratings that characterize the AT Series family. The cap is compatible with the thermoplastic housing of AT Series connectors and supports the integral latching system design. This accessory is commonly used in industrial applications to protect connector contacts from dust, moisture, and contamination during storage or when connectors are not in use, extending connector service life and maintaining electrical integrity.