EP21 4-40 masinakelgid

Spiral point tap, model B, threading chamfer length 3.5-5xP, UN coarse thread UNC 4, 40 TPI, 2B tolerance class, measurements according to standard DIN 2184-1, 3.5 mm shank, 2.7 mm square drive, powder metallurgical HSS-E, steam oxide coating, 2.5xD for deep through hole threads, for universal use