Item #: 12-016-016
Brand: YMW
Size Type: ANSI
Thread Size: 1/4"-20
Thread Limit: H3

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Extended length for hard to reach holes


  • Designed for difficult jobs including the stainless family of materials as well as alloy steels, high carbon steel and ductile irons,
  • Unique design ZELX SS taps increase productivity through longer tool life
  • Spiral flute taps pull chips out of the hole towards the shank.


  • Taps have oxide surface treatment.
  • Made from a custom blend of high vanadium high speed steel.
  • Thread length is approximately the same as non-extended taps.
  • Other sizes and H limits available.
Product Specifications
Brand YMW
Size Type ANSI
Thread Size 1/4"-20
Thread Limit H3
Chamfer Style Modified Bottoming
No. of Flutes 3
Finish Coating Black Oxide
Tool Material Vanadium High Speed Steel
Cutting Direction Right Hand
Chamfer 2 1/2-3 1/2
Coating Oxide
Flute Shape Spiral Flute
General Application Tapping
Hole Style Blind Hole
Model # 384513
Limit H3
Overall Length 6"
No. of Threads Per Inch 20
Pitch Form & Profile 60°
Pitch Tolerance +.00025"/-.00000"
Pitch 20
Prop. 65 Yes
Series 6in Extended Spiral Fluted Tap
Shank Diameter 0.255"
Shank Type Square Shank
Size 1/4"
Thread Length 0.433"
Tolerance Class UNC
Tolerance_Cutter Diameter ±.31"
Size_Combination 1/4"-20
Tolerance_Cutting Diameter ±.31"
Tolerance_Overall Length ±.31"
Threads Per Inch 20
Tolerance_Shank -.0015"
Tolerance_Shank Square -.004"
Type Spiral Fluted Tap
Workpiece Material Stainless steels, alloy steels and dictile irons.
weight 0.875 lbs
Shipping Restrictions UPS SHIP (DROP SHIP ITEM)
Country of Origin JAPAN
Prop 65 Warning Many metalworking products do contain metals that are included in the latest Prop 65 warning. Exposure to the elements can be harmful. May cause cancer and reproductive harm.

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