5 16 Unc Drill Size Tap size NF NC UNF UNC Threads per inch Basic major dia inches Basic effective dia inches Basic minor dia of ext threads inches Basic minor dia of int threads inches
Tap Drill Charts Unified National UNC UNF Pitch TPI Drill Size inch 0 80 3 64 1 64 0 059 53 72 0 059 53 2 56 0 067 51 64 0 070 50 3 48 5 64 56 0 081 46 10 24 0 149 25 32 0 159 21 12 24 0 173 17 28 0 180 15 1 4 20 0 201 7 28 0 213 3 5 16 18 0 257 F 24 0 272 I 3 8 16 5 16 24 0 332 Q 7 Below 1 4 the diameters are given by a series of numbers from 0 to 12 Each number describes an arbitrary diameter as shown in the below table It is also allowed to denote the diameters with a decimal value For example 0 250 1 4
5 16 Unc Drill Size
5 16 Unc Drill Size
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Tap Drill Charts
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Printable Drill Bit Size Chart
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Tap Drill Size mm 5 50 mm Pitch mm 0 907 mm For the UNC version the 1 4 bolt will have 20 threads per inch and you would use a tap drill that is approximately 5 35 mm in diameter The pitch or distance between threads will be about 1 270 mm 15 TAP DRILL SIZES UNIFIED THREAD MILLS Size Threads Per Inch Minor Diameter Tap Drill Diameter Cutting Tap 5 16 18 2520 2650 2630 2548 2584 2620 2656 2692 Threads Per Inch Minor Diameter Tap Drill Diameter Cutting Tap UNC UNF UNEF UN Min 2B 3B Max 2B Max 3B 80 Thread 75 Thread 70 Thread 65 Thread 60
Machinist Metric ISO Screw Thread Tap Drill Size Chart ANSI Standard Vee Thread Recommended Tap size and Drilled pilot Hole INCH SIZES NATIONAL COARSE THREAD SERIES Class 5 fit is not a loose thread It is an interference thread used on items like spring shackles on an automobile The letter suffix A or B denotes whether the threads are external or internal respectively Classes 1A 2A 3A apply to external threads Classes 1B
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Tapping drill sizes for imperial threads requires identifying whether you need Unified National Coarse UNC threads commonly used for general purposes or Unified National Fine UNF threads which are preferred for more precise engineering projects Machinist Screw Thread Tap Drill Size Chart UNC UNF Series ANSI Standard Vee Thread Recommended Tap Drill Size INCH SIZE NATIONAL COARSE TAP SIZE DRILL SIZE 0 80 3 64 1 64 53 2 56 51 3 48 5 64 4 40 43 5 40 39 6 32 36 8 32 29 10 24 25 12 24 17 1 4 20 7 5 16 18 F 3 8 16 5 16 7 16 14 U 1 2 13 27 64
1 3 4 8 41 5 1 7 8 8 44 5 2 8 47 5 UNC UNIFIED NATIONAL COARSE 60 Tap Size TPI Tapping Drill mm 2 086 56 1 85 3 099 48 2 1 4 112 40 2 3 5 125 40 2 6 16 60 Tap Size TPI Drill Only Drill Reamer 1 16 27 6 3 6 0 1 8 27 8 5 8 2 1 4 18 11 0 10 8 3 8 18 14 5 14 0 1 2 14 18 0 17 5 3 4 14 23 0 23 0 Tap Drill Sizes Clearance Holes Size DIA Close Fit Non Struct 1 64 OS 0 80 UNF 3 64 0469 No 53 5 64 1 64 UNC No 53 0595 No 49 No 43 1 72 UNF No 53 0595 No 49 No 43 2 56 UNC No 50 5 16 18 UNC F 2570 5 16 or O 21 64 5 16 24 UNF I 2720 5 16 or O 21 64 3 8 16 UNC 5 16 3125 3 8 or V 25 64 3 8 24 UNF Q 3320 3 8 or V 25 64
Unc Unf Threads
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Tap size NF NC UNF UNC Threads per inch Basic major dia inches Basic effective dia inches Basic minor dia of ext threads inches Basic minor dia of int threads inches
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Tap Drill Charts Unified National UNC UNF Pitch TPI Drill Size inch 0 80 3 64 1 64 0 059 53 72 0 059 53 2 56 0 067 51 64 0 070 50 3 48 5 64 56 0 081 46 10 24 0 149 25 32 0 159 21 12 24 0 173 17 28 0 180 15 1 4 20 0 201 7 28 0 213 3 5 16 18 0 257 F 24 0 272 I 3 8 16 5 16 24 0 332 Q 7
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5 16 Unc Drill Size - 15 TAP DRILL SIZES UNIFIED THREAD MILLS Size Threads Per Inch Minor Diameter Tap Drill Diameter Cutting Tap 5 16 18 2520 2650 2630 2548 2584 2620 2656 2692 Threads Per Inch Minor Diameter Tap Drill Diameter Cutting Tap UNC UNF UNEF UN Min 2B 3B Max 2B Max 3B 80 Thread 75 Thread 70 Thread 65 Thread 60
