General description Polished finish quality open body turnbuckles, commonly known as rigging screws, straining screws, and barrel strainers. This 20 mm T316 stainless steel turnbuckle hook/eye is designed for durability and strength, making it suitable for various applications, particularly in marine environments. Technical specifications D1 (mm) - M20 L (mm) - 300 L1 (mm) - 440 D (mm) - 30 Material - A4 grade stainless steel (Type 316 S31) Other information This material offers greater corrosion resistance than A2 in certain environments, especially when in direct contact with salt water. Measurements can vary, so please inquire if they are critical. Safe Working Load (SWL) and Working Load Limit (WLL) will be significantly lower than the breaking load, often requiring a safety ratio of 4:1. It is the customer's responsibility to ensure the product is fit for purpose.