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Hex Head Bolt Dimensions ASME B18.2.1

What is the dimensions of a hex head bolt?

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bolt_hexBody Diameter BasicBody Diameter MaxBody Diameter MinWidth Across Flats BasicWidth Across Flats MaxWidth Across Flats MinWidth Across Corners MaxWidth Across Corners MinHead Height BasicHead Height MaxHead Height MinRadius of Fillet MaxRadius of Fillet MinThread Length 6" and ShorterThread Length Over 6"
bolt_hex1/40.2600.2377/160.4380.4250.5050.48411/640.1880.1500.030.010.7501.000
bolt_hex5/160.3242.9801/20.5000.4840.5770.5527/320.2350.1950.030.010.8751.125
bolt_hex3/80.3880.3609/160.5620.5440.6500.6201/40.2680.2260.030.011.0001.250
bolt_hex7/160.4520.4215/80.6250.6030.7220.68719/640.3160.2720.030.011.1251.375
bolt_hex1/20.5150.4823/40.7500.7250.8660.82611/320.3640.3020.030.011.2501.500
bolt_hex5/80.6420.60515/160.9380.9061.0831.03327/640.4440.3780.060.021.5001.750
bolt_hex3/40.7680.7291-1/81.1251.0881.2991.2401/20.5240.4550.060.021.7502.000
bolt_hex7/80.8950.8521-5/161.3121.2691.5161.44737/640.6040.5310.060.022.0002.250
bolt_hex11.0220.9761-1/21.5001.4501.7321.65343/640.7000.5910.090.032.2502.500
bolt_hex1-1/81.1491.0981-11/161.6881.6311.9491.8593/40.7800.6580.090.032.5002.750
bolt_hex1-1/41.2771.2231-7/81.8751.8122.1652.06627/320.8760.7490.090.032.7503.000
bolt_hex1-3/81.4041.3452-1/162.0621.9942.3822.27329/320.9400.8100.090.033.0003.250
bolt_hex1-1/21.5311.4702-1/42.2502.1752.5982.48011.0360.9020.090.033.2503.500
bolt_hex1-3/41.7851.7162-5/82.6252.5383.0312.8931-5/321.1961.0540.120.043.7504.000
bolt_hex22.0391.96433.0002.9003.4643.3061-11/321.3881.1750.120.044.2504.500
bolt_hex2-1/42.3052.2143-3/83.3753.2623.8973.7191-1/21.5481.3270.190.064.7505.000
bolt_hex2-1/22.5592.4613-3/43.7503.6254.3304.1331-21/321.7081.4790.190.065.2505.500
bolt_hex2-3/42.8272.7114-1/84.1253.9884.7634.5461-13/161.8691.6320.190.065.7506.000
bolt_hex33.0812.9614-1/24.5004.3505.1964.95922.0601.8150.190.066.2506.500
bolt_hex3-1/43.3353.2104-7/84.8754.7125.6295.3722-3/162.2511.9360.190.066.7507.000
bolt_hex3-1/23.5893.4615-1/45.2505.0756.0625.7862-5/162.3802.0570.190.067.2507.500
bolt_hex3-3/43.8583.7265-5/85.6255.4376.4956.1982-1/22.5722.2410.190.067.7508.000
bolt_hex44.1113.97566.0005.8006.9286.6122-11/162.7642.4240.190.068.2508.500