M2 High Speed Steel Precision ground thread Class 2B ISO R.529 BS949 Pt 2 Parallel shank with square Spiral Point “Gun Nose” Right hand threading Usually stocked in blue temper finish for UNF threads to ANSI B1.1 Suitable for production tapping in most materials. Point geometry pushes chips forward—not suitable for blind holes. Useful in thin to medium sections.
M2 High Speed Steel Precision ground thread Class 2B ISO R.529 BS949 Pt 2 Parallel shank with square Spiral Fluted Right hand threading Usually stocked in bright ground finish for UNF threads to ANSI B1.1 Suitable for production tapping in deeper holes and in free-cutting materials. Spiral geometry draws chips upwards Can be used for blind holes. Effective in aluminium