Jobber - ThunderBit - Letter Sizes
Triumph ThunderBit heavy duty drill bits are made from premium grade high speed steel to endure high heat and pressure. Finished in black and bronze oxide to resist scratching and corrosion. 135 degree split point avoids walking or scarring on the surface of products. Unique spiral flute design improves chip ejection and coolant flow to the point. Letter Sizes from A-Z.
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| Size | Decimal Equivalent | Flute Length | Overall Length | Pkg Qty | Part # |
|---|---|---|---|---|---|
| A | 0.234 | 2-5/8 | 3-7/8 | 12 | 012701 |
| B | 0.238 | 2-3/4 | 4 | 12 | 012702 |
| C | 0.242 | 2-3/4 | 4 | 12 | 012703 |
| D | 0.246 | 2-3/4 | 4 | 12 | 012704 |
| E | 0.25 | 2-3/4 | 4 | 12 | 012705 |
| F | 0.257 | 2-7/8 | 4-1/8 | 12 | 012706 |
| G | 0.261 | 2-7/8 | 4-1/8 | 12 | 012707 |
| H | 0.266 | 2-7/8 | 4-1/8 | 12 | 012708 |
| I | 0.272 | 2-7/8 | 4-1/8 | 12 | 012709 |
| J | 0.277 | 2-7/8 | 4-1/8 | 12 | 012710 |
| K | 0.281 | 2-15/16 | 4-1/4 | 12 | 012711 |
| L | 0.29 | 2-15/16 | 4-1/4 | 12 | 012712 |
| M | 0.295 | 3-1/16 | 4-3/8 | 12 | 012713 |
| N | 0.302 | 3-1/16 | 4-3/8 | 12 | 012714 |
| O | 0.316 | 3-3/16 | 4-1/2 | 6 | 012715 |
| P | 0.323 | 3-5/16 | 4-5/8 | 6 | 012716 |
| Q | 0.332 | 3-7/16 | 4-3/4 | 6 | 012717 |
| R | 0.339 | 3-7/16 | 4-3/4 | 6 | 012718 |
| S | 0.348 | 3-1/2 | 4-7/8 | 6 | 012719 |
| T | 0.358 | 3-1/2 | 4-7/8 | 6 | 012720 |
| U | 0.368 | 3-5/8 | 5 | 6 | 012721 |
| V | 0.377 | 3-5/8 | 5 | 6 | 012722 |
| W | 0.386 | 3-3/4 | 5-1/8 | 6 | 012723 |
| X | 0.397 | 3-3/4 | 5-1/8 | 6 | 012724 |
| Y | 0.404 | 3-7/8 | 5-1/4 | 6 | 012725 |
| Z | 0.413 | 3-7/8 | 5-1/4 | 6 | 012726 |
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