ASME B18.6.3-2003 pdf download.Machine Screws and Machine Screw Nuts. Recess gaging values are included in the respective dimensional tables, including the reference dimensions of recess diameter, wing width, and total recess depth. The gaging method and specifications for gages are contained in Appendix III. Recess wobble gages, gaging procedures, and permissible limits are given in Appendix IV. 2.1.4 Slot. The...