UNBRAKO Socket Cap Screw Metric Iso (Coarse Series) 4G6G. Partial Spec : Din 7984, Asme B18.3.1M, Property

Smooth, burr-free sockets, uniformly concentric and usable to full depth for correct wrench engagement. Low head height for thin parts and limited space. Fillet under head increases fatigue life of head-to-shank junction. Class 3A rolled threads with radiused root to increase fatigue life of threads by reducing stress concentrations and avoiding sharp corners where failures start. Highest standards of quality, material, manufacture and performance. High strength, precision fasteners for use in parts too thin for standard height socket cap screw and for applications with limited clearances.