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Union Butterfield UTD 1010458
Union Butterfield 6006931 1572 Straight Flute STI Tap, 5/16-18 Thread, 4 Flutes, 3B/H3 Class of Fit, Plug Chamfer, Right Hand Cutting, UNC Thread
Factory Order
Union Butterfield STI Tap, Straight Flute, Series: 1572, Measurement System: Imperial, 5/16-18 Thread, UNC Thread Standard, 1-1/4 in Thread Length, 2-15/16 in Overall Length, 4 Flutes, Plug Chamfer, Right Hand Cutting Direction, Class of Fit: 3B/H3, 0.381 in Shank Diameter, F Tap Drill, 0.286 in Square, HSS, Bright
Features
- 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 or blind hole
Specifications
ApplicationThrough or Blind Hole Applications
Chamfer TypePlug
Class of Fit3B/H3
Cutting DirectionRight Hand
Finish/CoatingBright
MaterialHSS
Measurement SystemImperial
Number of Flutes4
Overall Length2-15/16 in
Series1572
Shank Diameter0.381 in
Square Size0.286 in
Tap Drill SizeF
Thread Length1-1/4 in
Thread Size5/16-18
Thread StandardUNC
TypeStraight Flute
Catalog
