DFW Machine » Machine Tools http://dfwmachine.com Fabrication and Machine Shop Services for Dallas - Fort Worth Thu, 21 Jul 2011 21:22:15 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 National Pipe Thread (NPT) Tap Drill Size http://dfwmachine.com/2010/11/national-pipe-thread-npt-tap-drill-size/ http://dfwmachine.com/2010/11/national-pipe-thread-npt-tap-drill-size/#comments Thu, 18 Nov 2010 15:10:06 +0000 Mike M. http://dfwmachine.com/?p=308  

Standard NPT Tap Drill Sizes
NPT Size
 Tap Drill Size (in.)
Decimal Equivalent (in.)
1/16 – 27
“C”
0.242
1/8 – 27
“Q” 
0.332
1/4 – 18
7/16
0.438
3/8 – 18
9/16
0.562
1/2 – 14
45/64
0.703
3/4 – 14
29/32
0.906
1.0 – 11•1/2
1•9/64
1.141
1•1/4 – 11•1/2
1•31/64
1.484
1•1/2 – 11•1/2
1•23/32
1.719
2.0 – 11•1/2
2•3/16
2.188
2•1/2 – 8
2•39/64
2.609
3.0 – 8
3•15/64
3.234
 
Metric Tap Drill Sizes
Standard UNC Tap Drill Sizes
Standard UNF Tap Drill Sizes

]]> http://dfwmachine.com/2010/11/national-pipe-thread-npt-tap-drill-size/feed/ 0 Drill Size Chart – Standard Fractional, Letter, Gauge and Metric http://dfwmachine.com/2010/11/drill-sizes-fractional-letter-gauge-metric/ http://dfwmachine.com/2010/11/drill-sizes-fractional-letter-gauge-metric/#comments Thu, 11 Nov 2010 03:30:23 +0000 Mike M. http://dfwmachine.com/?p=303 Drill size Diameter (in) Diameter (mm) #107 0.0019 0.0483 0.05 mm 0.0020 0.0500 #106 0.0023 0.0584 #105 0.0027 0.0686 #104 0.0031 0.0787 #103 0.0035 0.0889 #102 0.0039 0.0991 0.1 mm 0.0039 0.1000 #101 0.0043 0.1092 #100 0.0047 0.1194 #99 0.0051 0.1295 #98 0.0055 0.1397 #97 0.0059 0.1499 #96 0.0063 0.1600 #95 0.0067 0.1702 #94 0.0071 0.1803 #93 0.0075 0.1905 0.2 mm 0.0079 0.2000 #92 0.0079 0.2007 #91 0.0083 0.2108 #90 0.0087 0.2210 #89 0.0091 0.2311 #88 0.0095 0.2413 #87 0.0100 0.2540 #86 0.0105 0.2667 #85 0.0110 0.2794 #84 0.0115 0.2921 0.3 mm 0.0118 0.3000 #83 0.0120 0.3048 #82 0.0125 0.3175 #81 0.0130 0.3302 #80 0.0135 0.3429 #79 0.0145 0.3680 1/64 in 0.0156 0.3969 0.4 mm 0.0158 0.4000 #78 0.0160 0.4064 #77 0.0180 0.4572 0.5 mm 0.0197 0.5000 #76 0.0200 0.5080 #75 0.0210 0.5334 #74 0.0225 0.5715 0.6 mm 0.0236 0.6000 #73 0.0240 0.6096 #72 0.0250 0.6350 #71 0.0260 0.6604 0.7 mm 0.0276 0.7000 #70 0.0280 0.7112 #69 0.0292 0.7417 #68 0.0310 0.7874 1/32 in 0.0313 0.7938 0.8 mm 0.0315 0.8000 #67 0.0320 0.8128 #66 0.0330 0.8382 #65 0.0350 0.8890 0.9 mm 0.0354 0.9000 #64 0.0360 0.9144 #63 0.0370 0.9398 #62 0.0380 0.9652 #61 0.0390 0.9906 1 mm 0.0394 1.0000 #60 0.0400 1.0160 #59 0.0410 1.0414 #58 0.0420 1.0668 #57 0.0430 1.0922 1.1 mm 0.0433 1.1000 #56 0.0465 1.1811 3/64 in 0.0469 1.1906 1.2 mm 0.0472 1.2000 1.3 mm 0.0512 1.3000 #55 0.0520 1.3208 #54 0.0550 1.3970 1.4 mm 0.0551 1.4000 1.5 mm 0.0591 1.5000 #53 0.0595 1.5113 1/16 in 0.0625 1.5875 1.6 mm 0.0630 1.6000 #52 0.0635 1.6129 1.7 mm 0.0669 1.7000 #51 0.0670 1.7018 #50 0.0700 1.7780 1.8 mm 0.0709 1.8000 #49 0.0730 1.8542 1.9 mm 0.0748 1.9000 #48 0.0760 1.9304 5/64 in 0.0781 1.9844 #47 0.0785 1.9939 2 mm 0.0787 2.0000 #46 0.0810 2.0574 #45 0.0820 2.0828 2.1 mm 0.0827 2.1000 #44 0.0860 2.1844 2.2 mm 0.0866 2.2000 #43 0.0890 2.2606 2.3 mm 0.0906 2.3000 #42 0.0935 2.3749 3/32 in 0.0938 2.3813 2.4 mm 0.0945 2.4000 #41 0.0960 2.4384 #40 0.0980 2.4892 2.5 mm 0.0984 2.5000 #39 0.0995 2.5273 #38 0.1015 2.5781 2.6 mm 0.1024 2.6000 #37 0.1040 2.6416 2.7 mm 0.1063 2.7000 #36 0.1065 2.7051 7/64 in 0.1094 2.7781 #35 0.1100 2.7940 2.8 mm 0.1102 2.8000 #34 0.1110 2.8194 #33 0.1130 2.8702 2.9 mm 0.1142 2.9000 #32 0.1160 2.9464 3 mm 0.1181 3.0000 #31 0.1200 3.0480 3.1 mm 0.1221 3.1000 1/8 in 0.1250 3.1750 3.2 mm 0.1260 3.2000 #30 0.1285 3.2639 3.3 mm 0.1299 3.3000 3.4 mm 0.1339 3.4000 #29 0.1360 3.4544 3.5 mm 0.1378 3.5000 #28 0.1405 3.5687 9/64 in 0.1406 3.5719 3.6 mm 0.1417 3.6000 #27 0.1440 3.6576 3.7 mm 0.1457 3.7000 #26 0.1470 3.7338 #25 0.1495 3.7973 3.8 mm 0.1496 3.8000 #24 0.1520 3.8608 3.9 mm 0.1535 3.9000 #23 0.1540 3.9116 5/32 in 0.1563 3.9688 #22 0.1570 3.9878 4 mm 0.1575 4.0000 #21 0.1590 4.0386 #20 0.1610 4.0894 4.1 mm 0.1614 4.1000 4.2 mm 0.1654 4.2000 #19 0.1660 4.2164 4.3 mm 0.1693 4.3000 #18 0.1695 4.3053 11/64 in 0.1719 4.3656 #17 0.1730 4.3942 4.4 mm 0.1732 4.4000 #16 0.1770 4.4958 4.5 mm 0.1772 4.5000 #15 0.1800 4.5720 4.6 mm 0.1811 4.6000 #14 0.1820 4.6228 #13 0.1850 4.6990 4.7 mm 0.1850 4.7000 3/16 in 0.1875 4.7625 4.8 mm 0.1890 4.8000 #12 0.1890 4.8006 #11 0.1910 4.8514 4.9 mm 0.1929 4.9000 #10 0.1935 4.9149 #9 0.1960 4.9784 5 mm 0.1969 5.0000 #8 0.1990 5.0546 5.1 mm 0.2008 5.1000 #7 0.2010 5.1054 13/64 in 0.2031 5.1594 #6 0.2040 5.1816 5.2 mm 0.2047 5.2000 #5 0.2055 5.2197 5.3 mm 0.2087 5.3000 #4 0.2090 5.3086 5.4 mm 0.2126 5.4000 #3 0.2130 5.4102 5.5 mm 0.2165 5.5000 7/32 in 0.2188 5.5563 5.6 mm 0.2205 5.6000 #2 0.2210 5.6134 5.7 mm 0.2244 5.7000 #1 0.2280 5.7912 5.8 mm 0.2284 5.8000 5.9 mm 0.2323 5.9000 A 0.2340 5.9436 15/64 in 0.2344 5.9531 6 mm 0.2362 6.0000 B 0.2380 6.0452 6.1 mm 0.2402 6.1000 C 0.2420 6.1468 6.2 mm 0.2441 6.2000 D 0.2460 6.2484 6.3 mm 0.2480 6.3000 1/4 in 0.2500 6.3500 E 0.2500 6.3500 6.4 mm 0.2520 6.4000 6.5 mm 0.2559 6.5000 F 0.2570 6.5278 6.6 mm 0.2598 6.6000 G 0.2610 6.6294 6.7 mm 0.2638 6.7000 17/64 in 0.2656 6.7469 H 0.2660 6.7564 6.8 mm 0.2677 6.8000 6.9 mm 0.2717 6.9000 I 0.2720 6.9088 7 mm 0.2756 7.0000 J 0.2770 7.0358 7.1 mm 0.2795 7.1000 K 0.2810 7.1374 9/32 in 0.2813 7.1438 7.2 mm 0.2835 7.2000 7.3 mm 0.2874 7.3000 L 0.2900 7.3660 7.4 mm 0.2913 7.4000 M 0.2950 7.4930 7.5 mm 0.2953 7.5000 19/64 in 0.2969 7.5406 7.6 mm 0.2992 7.6000 N 0.3020 7.6708 7.7 mm 0.3032 7.7000 7.8 mm 0.3071 7.8000 7.9 mm 0.3110 7.9000 5/16 in 0.3125 7.9375 8 mm 0.3150 8.0000 O 0.3160 8.0264 8.1 mm 0.3189 8.1000 8.2 mm 0.3228 8.2000 P 0.3230 8.2042 8.3 mm 0.3268 8.3000 21/64 in 0.3281 8.3344 8.4 mm 0.3307 8.4000 Q 0.3320 8.4328 8.5 mm 0.3347 8.5000 8.6 mm 0.3386 8.6000 R 0.3390 8.6106 8.7 mm 0.3425 8.7000 11/32 in 0.3438 8.7313 8.8 mm 0.3465 8.8000 S 0.3480 8.8392 8.9 mm 0.3504 8.9000 9 mm 0.3543 9.0000 T 0.3580 9.0932 9.1 mm 0.3583 9.1000 23/64 in 0.3594 9.1281 9.2 mm 0.3622 9.2000 9.3 mm 0.3661 9.3000 U 0.3680 9.3472 9.4 mm 0.3701 9.4000 9.5 mm 0.3740 9.5000 3/8 in 0.3750 9.5250 V 0.3770 9.5758 9.6 mm 0.3780 9.6000 9.7 mm 0.3819 9.7000 9.8 mm 0.3858 9.8000 W 0.3860 9.8044 9.9 mm 0.3898 9.9000 25/64 in 0.3906 9.9219 10 mm 0.3937 10.0000 X 0.3970 10.0838 Y 0.4040 10.2616 13/32 in 0.4063 10.3188 Z 0.4130 10.4902 10.5 mm 0.4134 10.5000 27/64 in 0.4219 10.7156 11 mm 0.4331 11.0000 7/16 in 0.4375 11.1125 11.5 mm 0.4528 11.5000 29/64 in 0.4531 11.5094 15/32 in 0.4688 11.9063 12 mm 0.4724 12.0000 31/64 in 0.4844 12.3031 12.5 mm 0.4921 12.5000 1/2 in 0.5000 12.7000 13 mm 0.5118 13.0000 33/64 in 0.5156 13.0969 17/32 in 0.5313 13.4938 13.5 mm 0.5315 13.5000 35/64 in 0.5469 13.8906 14 mm 0.5512 14.0000 9/16 in 0.5625 14.2875 14.5 mm 0.5709 14.5000 37/64 in 0.5781 14.6844 15 mm 0.5906 15.0000 19/32 in 0.5938 15.0813 39/64 in 0.6094 15.4781 15.5 mm 0.6102 15.5000 5/8 in 0.6250 15.8750 16 mm 0.6299 16.0000 41/64 in 0.6406 16.2719 16.5 mm 0.6496 16.5000 17 mm 0.6693 17.0000 43/64 in 0.6719 17.0656 11/16 in 0.6875 17.4625 17.5 mm 0.6890 17.5000 45/64 in 0.7031 17.8594 18 mm 0.7087 18.0000 23/32 in 0.7188 18.2563 18.5 mm 0.7284 18.5000 47/64 in 0.7344 18.6531 19 mm 0.7480 19.0000 3/4 in 0.7500 19.0500 49/64 in 0.7656 19.4469 19.5 mm 0.7677 19.5000 25/32 in 0.7813 19.8438 20 mm 0.7874 20.0000 51/64 in 0.7969 20.2406 20.5 mm 0.8071 20.5000 13/16 in 0.8125 20.6375 21 mm 0.8268 21.0000 53/64 in 0.8281 21.0344 27/32 in 0.8438 21.4313 21.5 mm 0.8465 21.5000 55/64 in 0.8594 21.8281 22 mm 0.8661 22.0000 7/8 in 0.8750 22.2250 22.5 mm 0.8858 22.5000 57/64 in 0.8906 22.6219 23 mm 0.9055 23.0000 29/32 in 0.9063 23.0188 21/23 in 0.9130 23.1913 59/64 in 0.9219 23.4156 23.5 mm 0.9252 23.5000 15/16 in 0.9375 23.8125 24 mm 0.9449 24.0000 61/64 in 0.9531 24.2094 24.5 mm 0.9646 24.5000 31/32 in 0.9688 24.6063 25 mm 0.9843 25.0000 63/64 in 0.9844 25.0031 1 in 1.0000 25.4000 25.5 mm 1.0039 25.5000 1 1/64 in 1.0156 25.7969 26 mm 1.0236 26.0000 1 1/32 in 1.0313 26.1938 26.5 mm 1.0433 26.5000 1 3/64 in 1.0469 26.5906 1 1/16 in 1.0625 26.9875 27 mm 1.0630 27.0000 1 5/64 in 1.0781 27.3844 27.5 mm 1.0827 27.5000 1 3/32 in 1.0938 27.7813 28 mm 1.1024 28.0000 1 7/64 in 1.1094 28.1781 28.5 mm 1.1221 28.5000 1 1/8 in 1.1250 28.5750 1 9/64 in 1.1406 28.9719 29 mm 1.1417 29.0000 1 5/32 in 1.1563 29.3688 29.5 mm 1.1614 29.5000 1 11/64 in 1.1719 29.7656 30 mm 1.1811 30.0000 1 3/16 in 1.1875 30.1625 30.5 mm 1.2008 30.5000 1 13/64 in 1.2031 30.5594 1 7/32 in 1.2188 30.9563 31 mm 1.2205 31.0000 1 15/64 in 1.2344 31.3531 31.5 mm 1.2402 31.5000 1 1/4 in 1.2500 31.7500 32 mm 1.2598 32.0000 1 17/64 in 1.2656 32.1469 32.5 mm 1.2795 32.5000 1 9/32 in 1.2813 32.5438 1 19/64 in 1.2969 32.9406 33 mm 1.2992 33.0000 1 5/16 in 1.3125 33.3375 33.5 mm 1.3189 33.5000 1 21/64 in 1.3281 33.7344 34 mm 1.3386 34.0000 1 11/32 in 1.3438 34.1313 34.5 mm 1.3583 34.5000 1 23/64 in 1.3594 34.5281 1 3/8 in 1.3750 34.9250 35 mm 1.3780 35.0000 1 25/64 in 1.3906 35.3219 35.5 mm 1.3976 35.5000 1 13/32 in 1.4063 35.7188 36 mm 1.4173 36.0000 1 27/64 in 1.4219 36.1156 36.5 mm 1.4370 36.5000 1 7/16 in 1.4375 36.5125 1 29/64 in 1.4531 36.9094 37 mm 1.4567 37.0000 1 15/32 in 1.4688 37.3063 37.5 mm 1.4764 37.5000 1 31/64 in 1.4844 37.7031 38 mm 1.4961 38.0000 1 1/2 in 1.5000 38.1000
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