Specifies dimensions for form, width and diameter of undercuts and runouts for ISO metric external and internal threads for use in general engineering applications. Threads may be cut or rolled without the die or tap fouling the component.Cross References:BS 1134BS 1936:Part 1BS 4500:Part 1BS 6104:Part 1A 231SAE J811Engineering sciences data item no. 80028 Fatigue strength of large steel bolts and threaded connections under axial loading (ESDU International) Engineering sciences data item no. 89048 Elastic stress concentration factors. Geometric discontinuities in rods and tubes of isotropic materials (ESDPeterson, R.E. Stress concentration factors New York: John Wiley: 1974