1.800.348.2885

1/4-18NPT PTT 4FL GP TAPER PIPE TAP

    General

  • Brand NameGreenfield Threading
  • Style #PTT
  • Item #385398
  • SetNo

    Dimensions

  • Tool Size1/4"-18 NPT
  • Diameter0.2500"
  • Tap Standard Projection0.4590"
  • Overall Length2.4375"
  • Overall Length (Metric)61.91mm

    Thread

  • Thread FormNPT
  • Thread Pitch18
  • Thread Size1/4"
  • Thread CreationThread Cutting
  • Tap Interrupted ThreadNo
  • Thread Length (Metric)26.99mm
  • Thread Length1.0625"

    Specifications

  • Surface ConditionBright
  • Measurement SystemImperial
  • MaterialHSS
  • Tap TypePipe Tap
  • Tap StyleTapered Pipe Tap
  • Tap ConstructionMedium Hook Taper
  • Tap Spiral PointNo
  • Tap Blank ConstructionUSCTI Table 311
  • Tap Ground ThreadsYes
  • Tap HookMedium (5-10)
  • Tap ChamferSemi-Bottoming
  • Tap Truncated ThreadsNo
  • Flute TypeStraight
  • Number of Flutes4
  • Hand of CutRight
  • Net Weight59g

    Shank

  • Shank Size0.5625"
  • Shank Size (Metric)14.29mm
  • Shank ConfigurationStraight w/ Square
  • Shank End FeatureSquare
  • Shank End Feature Length0.4375"
  • Shank End Feature Length (Metric)11.11mm
  • Shank End Feature Width0.4210"
  • Shank End Feature Width (Metric)10.69mm
  • Shank Square Width0.4210"
  • Shank Square Width (Metric)10.69mm
  • Shank Square Length0.4375"
  • Shank Square Length (Metric)11.11mm

    Application

  • Material ApplicationK: Cast Iron, M: Stainless Steel, N: Non-ferrous (Aluminum), P: Steel
Literature:

Warnings:

This product contains Cobalt and/or Nickel and/or Lead a chemical known to the state of California to cause cancer, or birth defects or other reproductive harm. For more information: www.p65warnings.ca.gov

  • SKU: 385398
  • Category: Taps
  • Brand: Greenfield Threading
  • Pack Qty: 1
  • Min Qty: 1

Additional Information

Greenfield Industries, Inc.
2501 Davis Creek Road
Seneca, SC 29678
greenfield.information@gfii.com

Customer Service USA:
Voice 800.348.2885 • Fax 800.892.4290
International Sales:
Voice 864.653.3904
Greenfield Industries © 2026 Greenfield Industries, Inc. - All rights reserved.
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