Union Butterfield 1010506 1578 Spiral Point STI Tap, Imperial, 1/4-20, 2 Flutes, 2B/3B/H2 Class of Fit, Plug Chamfer, Right Hand Cutting, UNC Thread

  • Item Code: UNIO 6006891 1010506 1578
  • Brand: Union Butterfield
  • Mfg Part No: 1010506
  • Manufacturer: Dormer Pramet
  • Unit Size: 1

Description

Features Tech Specs Applications

Features

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    • Designed for use in aluminum, magnesium, and other nonferrous materials where taps of this type are most commonly used
    • Taps suitable for other materials can be furnished on request
    • STI taps are dimensionally oversize and utilize a larger tap drill size so that the thread they produce will accept a helical coil wire screw thread insert of the same nominal size and pitch
    • For a particular size and pitch the lower H-Limit number is suggested for class 2B and 3B threads, while the higher H-Limit is suggested for class 2B
    • Through hole

Tech Specs

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Chamfer Type Plug
Class of Fit 2B/3B/H2
Cutting Direction Right Hand
Material HSS
Measurement System Imperial
Number of Flutes 2
Overall Length 2-23/32
Series 1578
Shank Diameter 0.318
Size 1/4-20
Square Size 0.238
Tap Drill Size #7
Thread Length 1-1/8
Thread Standard UNC
Type Spiral Point
UPC 69846402128

Applications

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Through Hole Applications

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