Metric Coarse Thread

Metric Coarse Thread

Threaded fasteners, bolts, nuts, screws and fastenings 

 

threads

 

ISO Metric CoarsePITCHMajor DiameterRoot RadiusPitch DiameterMinor Diameter male threadMinor Diameter female threadThread Height male threadThread Height female threadTap Drill
  Pd=Drd2=D2d3D1h3H1 
M10.251.000.0360.8380.6930.7290.1530.1350.75
M1.10.251.100.0360.9380.7930.8290.1530.1350.85
M1.20.251.200.0361.0380.8930.9290.1530.1350.95
M1.40.301.400.0431.2051.0321.0750.1840.1621.10
M1.60.351.600.0511.3731.1711.2210.2150.1891.25
M1.80.351.800.0511.5731.3711.4210.2150.1891.45
M20.402.000.0581.7401.5091.5670.2450.2171.60
M2.20.452.200.0651.9081.6481.7130.2760.2441.75
M2.50.452.500.0652.2081.9482.0130.2760.2442.05
M30.503.000.0722.6752.3872.4590.3070.2712.50
M3.50.603.500.0873.1102.7642.8500.3680.3252.90
M40.704.000.1013.5453.1413.2420.4290.3793.30
M4.50.754.500.1084.0133.5803.6880.4600.4063.80
M50.805.000.1154.4804.0194.1340.4910.4334.20
M61.006.000.1445.3504.7734.9170.6130.5415.00
M71.007.000.1446.3505.7735.9170.6130.5416.00
M81.258.000.1807.1886.4666.6470.7670.6776.80
M91.259.000.1808.1887.4667.6470.7670.6777.80
M101.5010.000.2179.0268.1608.3760.9200.8128.50
M111.5011.000.21710.0269.1609.3760.9200.8129.50
M121.7512.000.25310.8639.85310.1061.0740.94710.20
M142.0014.000.28912.70111.54611.8351.2271.08312.00
M162.0016.000.28914.70113.54613.8351.2271.08314.00
M182.5018.000.36116.37614.93315.3941.5341.35315.50
M202.5020.000.36118.37616.93317.2941.5341.35317.50
M222.5022.000.36120.37618.93319.2941.5341.35319.50
M243.0024.000.43322.05120.31920.7521.8401.62421.00
M273.0027.000.43325.05123.31923.7521.8401.62424.00
M303.5030.000.50527.72725.70626.2112.1471.89426.50
M333.5033.000.50530.72728.70629.2112.1471.89429.50
M364.0036.000.57733.40231.09331.6702.4542.16532.00
M394.0039.000.57736.40234.09334.6702.4542.16535.00
M424.5042.000.65039.07736.47937.1292.7602.43637.50
M454.5045.000.65042.07739.47940.1292.7602.43640.50
M485.0048.000.72244.75241.86642.8573.0672.70643.00
M525.0052.000.72248.75245.86646.5873.0672.70647.00
M565.5056.000.79452.42849.25250.0463.3742.97750.50
M605.5060.000.79456.42853.25254.0463.3742.97754.50
M646.0064.000.86660.10356.63957.5053.6813.24858.00
M686.0068.000.86664.10360.63961.5053.6813.24862.00

Metric screw threads are the most commonly used worldwide type of general-purpose screw thread. They were one of the first international standards agreed when the International Organization for Standardization that was set up in 1947, metric bolt and screw threads but did not come into widespread use until 1960.