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Thread Identification

Thread Identification and Drill ChartMetric

DIAMETER INTHREAD ISO COARSEISO FINE BAINCHESSIZEDRILL SIZEDRILL SIZEDIAMETERMMPITCH INCH MMOTHERPITCHINCHMMSIZEMMINCHPITCHDRILL .0792.42.106.0.23616.2 .0872.2.45No. 422.324.7.185.84.9 .0982.5.45No. 372.643.6.142.663.8 .1183.51/83.262.8.110.532.9 .1383.5.6No. 273.782.2.860.432.3 .1574.711/644.2101.7.670.351.7 .1975.813/645.2 .236611/46.3 .276719/327.3 .31581.2521/648.3121/648.3 .35491.259.419.3 .394101.513/3210.41*1.2513/3210.25 .433111.511.511.2511.25 .472121.7531/6412.51.251.531/6412.25 .5121313.51.513.25 .55114237/6414.51.25*1.59/1614.25 .63016221/3216.51.521/3216.5 .709182.547/6418.751.5*223/3218.5 .787202.513/1620.751.5213/1620.5 .866222.522.751.5222.5 .94524324.751.5224.5 *M10 X 1, M12 X 1.25, M14 X 1.25, M18 X 1.5 - popular spark plug sizes sizes above M24 available on request.

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