Presto 1/4″ UNC HSS Second Machine Tap

1/4″ UNC Second Tap
HSS Machine Tap (Second Tap)
Quality High Speed Steel as you would expect from Presto Tools
Used for cutting internal threads,
Straight Flute full size taps
Hand tap sets for tapping in free cutting steel upto 800N/mm2.
The perfect form threads is generated by a combination of effective pitch diameter,
Major diameter and chamfer length