"Size","Pitch (coarse)","Head Ø dk max","Head height k max","Recess size"
"M3","0.5","5.6","2.4","H1 / Z1"
"M4","0.7","8","3.1","H2 / Z2"
"M5","0.8","9.5","3.7","H2 / Z2"
"M6","1","12","4.6","H3 / Z3"
"M8","1.25","16","6","H4 / Z4"
"M10","1.5","20","7.5","H4 / Z4"
"Reference only — confirm against drawing. ISO 7045. REL India"