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en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

Below is a comprehensive drill and tap size chart for all drills and taps, imperial and metric, up to 36.5 millimetres (1.44 in) in diameter. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly. One of the most common ...

www.lincolnmachine.com/tap_drill_chart.html

To Tap This Size Screw Or Bolt: Use This Drill Bit: (Closest Fractional:) Decimal Inches. 0-80 NF. 3/64". 3/64" .0469. 1-64 NC. #53. - .0595. 1-72 NF. #53. 1/16" . 0595. 2-56 NC. #50. - .0700. 2-64 NF. #50. - .0700. 3-48 NC. #47. 5/64" .0785. 3- 56 NF. #45. - .0820. 4-36 NS. #44. - .0860. 4-40 NC. #43. 3/32" .0890. 4-48 NF. # 42.

www.boltdepot.com/fastener-information/us-tap-drill-size.aspx

... Sheet Metal Screws · Bolts · Flange Bolts · Machine Screws · Nuts and Washers · Anchoring Products · Eye Bolts and Eye Lags · Hanger Bolts · U-Bolts and J-Bolts · Shoulder Bolts · Sex Bolts · Blind Rivets · Driver Bits · Unit Conversion · Tap and Drill Sizes · Other Useful Information · Click here for BBB Business Review ...

www.americanfastener.com/tap-and-drill-size-chart

THREADSIZE, DRILL DIAMETER. Coarse Thread. TAP DRILLSIZE. 1-64 .0595, No. 53. 2-56 .0700, No. 50. 3-48 .0785, No. 47. 4-40 .0890, No. 43. 5-40 .1015, No. 38. 6-32 .1065, No. 36. 8-32 .1360, No. 29. 10-24 .1495, No. 25. 12-24 .1770, No. 16. 1/4-20 .2010, No. 7. 5/16-18 .2570, 'F'. 3/8-16 .3125, 5/16. 7/16-14 .3680  ...

www.trfastenings.com/Products/knowledgebase/Tables-Standards-Terminology/Tapping-Sizes-and-Clearance-Holes

Thread, Drill size for tapping standard metric threads, Drill size for tapping fine metric threads, Clearance hole. M1, 0.75, -, 1.2. M1.2, 0.95, -, 1.4. M1.4, 1.1, -, 1.6 . M1.6, 1.5, -, 1.8. M1.8, 1.4, -, 2. M2, 1.6, -, 2.4. M2.2, 1.7, -, 2.8. M2.5, 2, -, 2.9. M3 , 2.5, -, 3.4. M3.5, 2.9, -, 3.9. M4, 3.3, -, 4.5. M5, 4.2, -, 5.5. M6, 5, -, 6.6. M8, 6.8, 7, 9.

www.wlfuller.com/html/tap_drill_chart.html

Tap Size. Drill Size. M1.6 x 0.35. 1.25mm. M2 x 0.4. 1/16. M2.5 x 0.45. 2.05mm. M3 x 0.5. #40. M3 x 0.6. 2.5mm. M3.5 x 0.6. #33. M4 x 0.7. 3.3mm. M4 x 0.75. 3.4 mm. M5 x 0.8. 4.2mm. M5 x 0.9. 4.2mm. M6 x 1. 5mm. M6.3 x 1. 5.5mm. M7 x 1. 6.1mm. M8 x 1. 7.1mm. M8 x 1.25. 6.7mm. M9 x 0.75. 8.3mm. M9 x 1. 8.1mm.

www.stanleyengineeredfastening.com/sites/www.emhartamericas.com/files/downloads/spiralock-drill-size-charts.pdf

recommended. 3. These recommendations are for cutting with regular preload- locking threading taps. 4. Preload-locking threads can be applied to threading tools in sizes from 0.30 mm. Metric. Thread. Size. Hole Minor. Dia. Min. (mm). Hole Minor. Dia. Max. (mm). Drill. Size*. Metric. Thread. Size. Hole Minor. Dia. Min. (mm).

littlemachineshop.com/reference/tapdrill.php

Screw Size, Major Diameter, Threads Per Inch, Minor Diameter, Tap Drill, Clearance Drill. 75% Thread for. Aluminum, Brass, & Plastics, 50% Thread for. Steel, Stainless, & Iron, Close Fit, Free Fit. Drill Size, Decimal Equiv. Drill Size, Decimal Equiv. Drill Size, Decimal Equiv. Drill Size, Decimal Equiv. 0 .0600, 80 . 0447, 3/64 ...

www.fasnetdirect.com/refguide/sthole.pdf

SELF- TAPPING SCREWS. HOLE SIZE DATA. SUGGESTED TEST PLATE THICKNESSES & HOLE. SIZES FOR TYPES AB - B - 25. Nominal. Screw Size. & No. of. Threads per Inch. Thickness. Hole Size. Gage. Max. Min. Drill. Size. Hole. Diam. 2-32. 18 .0500 .0460. 48 .0760. 3-28. 18 .0500 .0460. 46 .0810. 4-24. 18 . 0500.