DORMER

HSS-E-PM MACHINE TAP


Thread Diameter Size (TDZ)1/4″ Tool TypeMachine Tap 
Threads per Inch (TPI)28 CoatingTiAlN/Top 
Thread StandardUNF Tapping Prehole Diameter (Pre-hole)#3 
Overall Length (OAL)3.15″ Flute Length0.591″ 
Thread Cutting Part Length (THL)0.591″ Flute TypeStraight 
Usable Length (LU)0.984″ StyleBottoming 
Connection Diameter Machine Side (DCONMS)0.255″ Cutting Direction (HAND)Right Hand 
Flute Count (NOF)Coolant Supply Property (CSP)Axial Coolant 
Flute Helix Angle (FHA)0 Degrees Length Group2.5D 
Applicable MaterialCast Iron Square Size0.189″ 
Cutting Edge MaterialHSS-E-PM Measurement TypeFractional 
Thread Tolerance Class (TCTR)H4 Series/List #E915 
Special FeatureWhite Ring Thread Size‎1/4″ - 28 
StandardDIN/ANSI