YMW 1/4"-28 H3 3 Flute High Speed Steel Spiral Fluted Bottoming Tap,
Spiral Pointed Plug Tap

YMW 1/4"-28 H3 3 Flute High Speed Steel Spiral Fluted Bottoming Tap,

Item #: 12-014-016
Brand: YMW
Size Type: ANSI
Thread Size: 1/4"-28
Thread Limit: H3

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Vanadium content results in less breakage


  • Designed for carbon steels, alloyed steels, brass & free machining materials, including stainless steel that require the most economical tool life.
  • Ideal for materials that produce stringy chips, such as steels, stainless steels and plastics.
  • Spiral fluted taps are recommended for tapping blind holes where the chips are pulled out of the hole towards the tap shank instead of pushing them to the bottom of the hole.


  • Bright surface finish.
  • 2.5 threads chamfered.
  • DIN lengths with ANSI shank dimensions.
Product Specifications
Brand YMW
Size Type ANSI
Thread Size 1/4"-28
Thread Limit H3
Chamfer Style Modified Bottoming
No. of Flutes 3
Finish Coating Bright
Tool Material Vanadium High Speed Steel
Cutting Direction Right Hand
Chamfer 2.5 Threads
Coating TiAlN
Flute Length .591"
Flute Shape Spiral Flute
H Limit H3
Helix Angle
Hole Style Blind Hole
Limit H3
Material To Be Machined Steels, Ferrous Materials That Produce Stringy Chips, Brass & Plastics.
No. of Threads Per Inch 28
Package Qty 1
Overall Length 3.15"
Pitch 28
Pitch Diameter .223 - .260
Pitch Form & Profile 60°
Pitch Tolerance +.00025" / -.00000"
Prop. 65 Yes
Series SP
Shank Diameter .2550"
Shank Type Square Shank
Size 1/4"
Square Length .31"
Square Size .191"
Thread Length 0.591"
Tolerance Class UNF
Tolerance_Shank Square -.004"
Tolerance_Flute Length ± .063"
Tolerance_Overall Length ± .031"
Tolerance_Shank -.0015"
Tool Coolant Feeding No
Type Spiral Fluted Bottoming Tap
Weight 0.025 lbs.
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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