Starfield Optics C / CS Mount Locking Ring: Secure Your Camera Connections Primary Function: Serves as a locking ring for C / CS mount threading, ensuring secure camera connections. Slim Profile: Features a minimal 4mm thickness, maintaining a compact and non-intrusive design. Thread Specifications: Comes with precisely threaded 1" x 32TPI, suitable for standard C / CS mounts. Depth Adjustment Solution: Ideal for situations where male threads exceed the depth of available female threads, ensuring a stable and reliable connection. Enhanced Security: Provides additional security to camera and accessory attachments, preventing loosening and misalignment. High-Quality Construction: Made from durable materials for consistent performance and longevity. Easy to Use: Designed for straightforward application, simplifying the process of securing camera equipment. Essential Accessory: A must-have for photographers and astrophotographers using C / CS mount cameras and accessories for precise and stable imaging. Specifications C / CS Mount thread locking ring.4mm thickness.Threaded 1" x 32TPI. Use when male threads exceed the available female thread depth.