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Tapping Drills

Tapping Drills

 Tapping drills are just Jobber Drills in weird and wonderful sizes.

Drill Diameter (mm) Tapping drill will suit these thread sizes
2.85       6-32  
3.00     4BA    
3.30         M4 x 0.7
3.50       8-32  
3.70 3/16 BSW        
3.90       10-24  
4.00  3/16 BSF   2BA    
4.10       10-32  
4.20         M5 x 0.8
4.50     1BA  12-24  
5.00         M6 x 1.0
5.10 1/4 BSW   0BA  1/4 UNC  
5.30 1/4 BSF        
5.50       1/4 UNF  
5.60   1/4 BSCY      
6.00         M7 x 1.0
6.50 5/16 BSW        
6.60       5/16 UNC  
6.80 5/16 BSF       M8 x 1.25
6.90       5/16 UNF  
7.00   5/16 BSCY     M8 x 1.0
8.00       3/8 UNC  
8.30 3/8 BSF        
8.50       3/8 UNF  
8.70   3/8 BSCY