With a substitutable, 100% crack detected hexagon head cap bolt with thread lengths of H= 20 - 52 mm are available. When ordering implicitly indicate the required length. Load ring is stowable and swivels in all directions. The load ring must be flexible and adjusted to the load direction before being loaded. Ensure that there is no contact between the ring and the edges of the work piece. Avoid swiveling under full load. A single threaded hole or a through hole is necessary. A very small construction. Work piece material, at least 1.0037 (St 37). For light metals, nonferrous heavy metals and grey cast iron, the thread type allocation must be done in such a way that, the WLL of the thread type fulfils the requirements of the respective work piece. Make sure the bolting surface (N) is plain. For further details refer to the product information sheet.