Spiral Point Tap Thread Size 1/4 In.-28 UNF Overall Length 3 1/8 in High Speed Steel THL Right Hand Thread Length 9/16 in 75 Percent Thread Drill Size 5.45 mm Thread Limit H3 H4 Class of Fit 6H Number of Flutes 3MRO428H44
| # | Attribute | Value |
|---|---|---|
| 1. | brand | WALTER PROTOTYP |

