Spiral Flute Tap Thread Size 1/4 In.-28 UNF Overall Length 3 1/8 in High Speed Steel TiN Thread Length 3/8 in 75 Percent Thread Drill Size 5.45mm Thread Limit H3 H4 Class of Fit 2B Thread Direction Right Hand Number of Flutes 3MRO428P50
| # | Attribute | Value |
|---|---|---|
| 1. | brand | WALTER PROTOTYP |

