Carmex MT0250C0428UN

Helical Flute Thread Mill: 1/4-28, Internal, 3 Flute, 1/4″ Shank Dia, Solid Carbide 28 TPI, 0.1570 mm Cut Dia, 0.4500″ LOC, 2-1/2″ OAL, TiAlN Coated