Union Butterfield® 1572 Straight Flute STI Hand Tap, Imperial, 1/4-20, UNC Thread, 3 Flutes, 3B, Plug
PREDOR 6006921
$25.06
/ EA
Out of Stock
- Material: High Speed Steel
- Series: 1572
- Size: 1/4 in -20
- Thread Length: 1-1/8 in
- Overall Length: 2-23/32 in
- Shank Diameter - Metric: 8.077 mm
- Shank Diameter - Decimal: 0.318 in
- 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
- 3/8 in square length
- H3 thread limit
Union Butterfield® STI Hand Tap| Straight Flute| Series: 1572| Measurement System Imperial| 1/4-20| UNC| Plug Chamfer| 1-1/8 in Thread Length| 2-23/32 in Overall Length| 3 Flutes| Right Hand Cutting| Class of Fit: 3B| 0.318 in Shank Dia| #7 Tap Drill| 0.238 in Square Size| HSS| Bright