ASME B18.2.2 1/2"-13 UNC SA194Gr.8 nuts for Stud bolts
Firma Killich s.r.o. offers nuts according to ASME B18.2.2. Nuts according to ASME B18.2.2 are suitable eg for pipes. The assortment of nuts according to ASME M18.2.2 includes steel nuts 25CrMo4 or SA194Gr.7