Drill Bit Sizes for Tap Holes: Complete Reference Chart
Overview
Drill Bit Sizes for Tap Holes: Complete Reference Chart supplied by Wryno Global. Key published specifications: Thread Size Threads Per Inch; 75% Engagement Drill 50% Engagement Drill; 43 (2.27mm) #42 (2.37mm); 36 (2.79mm) #35 (2.95mm). Contact the supplier through the RFQ form for pricing, lead time and full datasheets.
Technical specifications
| Thread Size | Threads Per Inch |
|---|---|
| 75% Engagement Drill | 50% Engagement Drill |
| 43 (2.27mm) | #42 (2.37mm) |
| 36 (2.79mm) | #35 (2.95mm) |
| 29 (3.45mm) | #28 (3.57mm) |
| 25 (3.80mm) | #24 (3.91mm) |
| 7 (5.11mm) | 13/64″ (5.16mm) |
| F (6.53mm) | 17/64″ (6.75mm) |
| 5/16″ (7.94mm) | Q (8.43mm) |
| 27/64″ (10.72mm) | Z (10.49mm) |
| 3 (5.41mm) | 7/32″ (5.56mm) |
| I (7.09mm) | J (7.24mm) |
| Q (8.43mm) | 11/32″ (8.73mm) |
| 29/64″ (11.51mm) | 15/32″ (11.91mm) |
| Material | Recommended Engagement |
| Use standard chart | Standard reference material |
| Drill Bit Sizes for Tap Holes | Complete Reference Chart |
| Understanding Thread Engagement | 75% vs 50% |