Pipe Thread Dimensions Table: Standard Sizes & Measurements | MachineMFG

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Pipe Thread Dimensions Table: Standard Sizes & Measurements

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Basic Dimension Table for Pipe Threads

Basic Dimension Table for Pipe Threads

Unit: mm

Dimension CodeNumber of Teeth per 25.4mm, nPitch, pTooth Height, hApproximate Radius of Arc, r≈Basic Diameter on the DatumDatum DistanceEffective Thread Length
Major Diameter (Datum Diameter), d=DMedian Diameter, d2=D2Minor Diameter, d1=D1
1/16280.9070.5810.1257.7237.1426.5614.06.5
1/8280.9070.5810.1259.7289.1478.5664.06.5
1/4191.3370.5860.18413.15712.30111.4456.09.7
3/8191.3370.5860.18416.66215.80614.9506.410.1
1/2141.8141.1620.24920.95519.79318.6318.213.2
3/4141.8141.1620.24926.44125.27924.1179.514.5
1112.3091.4790.31733.24931.77030.29110.416.8
1.1/4112.3091.4790.31741.91040.43138.95212.719.1
1.1/2112.3091.4790.31747.80346.32444.84512.719.1
2112.3091.4790.31759.61458.13556.65615.923.4
2.1/2112.3091.4790.31775.18473.70572.22617.526.7
3112.3091.4790.31787.88486.40584.92620.629.8
3.1/2112.3091.4790.317100.33098.85197.37222.231.4
4112.3091.4790.317113.030111.551110.07225.435.8
5112.3091.4790.317138.430136.951135.47228.640.1
6112.3091.4790.317163.830162.351160.87228.640.1

Basic Dimensions Table for Conical Pipe Threads

Dimension CodeNumber of Teeth per 25.4mm, nBasic Diameter on the DatumDatum Distance
Major Diameter (Datum Diameter), d=DMedian Diameter, d2=D2Minor Diameter, d1=D1
1/16277.8957.1426.3894.064
1/82710.2429.4898.7364.102
1/41813.61612.48711.3585.786
3/81817.05515.92614.7976.096
1/21421.22319.77218.3218.128
3/41426.56825.11723.6668.611
111.533.22831.46129.69410.160
1.1/411.541.98540.21838.45110.668
1.1/211.548.05446.28744.52010.668
211.560.09258.32556.55811.074
2.1/2872.69970.15967.61917.323
3888.60886.06883.52819.456
3.1/28101.31698.77696.23620.853
48113.973111.433108.89321.438

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