Round Dies, left, DIN 223 (DIN EN 22568), HSS-G, M 20 x 2.5 LH 

for general use - non abrasive material up to 800 N/mm² - unalloyed and low alloyed steel Thread type: metric ISO-thread DIN 13 Norm: DIN 223 (DIN EN 22568) Material: HSS-G