![Table AII-5.--Number, Letter and Fractional Identification of Drill Sizes (Letter drills are larger than number drills; they begin where number drills end.) Table AII-5.--Number, Letter and Fractional Identification of Drill Sizes (Letter drills are larger than number drills; they begin where number drills end.)](https://enginemechanics.tpub.com/14345/1434500401im.jpg)
Table AII-5.--Number, Letter and Fractional Identification of Drill Sizes (Letter drills are larger than number drills; they begin where number drills end.)
Model Engineering and engineering tools online from RDG Tools Ltd Home Page (Engineering Tools) Tel 01422 885069 /884605
Model Engineering and engineering tools online from RDG Tools Ltd Home Page (Engineering Tools) Tel 01422 885069 /884605
![Tapping Drill Chart - Tapping Chart - Metric Threads - Imperial Threads Number & Letter Drill Chart - Cross Tools Co Tapping Drill Chart - Tapping Chart - Metric Threads - Imperial Threads Number & Letter Drill Chart - Cross Tools Co](https://crosstools.com.au/images/thread%20chart%20cropped%20touched%20up%2031-8-2015%20jpg.jpg?crc=422710761)