Metric Socket Head Cap Screw Size Chart

It is important to remember that usually, hexagon socket head cap screws are not available in sizes larger than M36 or smaller than M3. There are a few suppliers that might stock these items but if you are looking for those specific sizes, it’ll be best to get in contact directly with the supplier. See more size charts here. See here for some great socket sets.

 

Metric Socket Head Cap Screw Size Table

Nom. Size Thread PitchMAX Body DiameterMIN Body DiameterMAX Head DiameterMIN Head DiameterMAX Head HeightMIN Head HeightMAX RadiusNOM. Hexagon Socket SizeNOM. Spline Socket SizeMIN Key Engagement MAX Transition Diameter
M1,6 x 0,351.601.463.002.871.601.520.161.501.8290.802.00
M2 x 0,42.001.863.803.652.001.910.201.501.8291.002.60
M2,5 x 0,452.502.364.504.332.502.40.252.002.4381.253.10
M3 x 0,53.002.865.505.323.002.890.302.502.8191.503.60
M4 x 0,74.003.827.006.84.003.880.403.003.3782.004.70
M5 x 0,85.004.828.508.275.004.860.504.004.6482.505.70
M6 x 0,106.005.8210.009.746.005.850.605.005.4863.006.80
M8 x 0,1258.007.7813.0012.78.007.830.806.007.3914.009.20
M10 x 1,510.009.7816.0015.6710.009.811.008.005.0011.20
M12 x 1,7512.0011.7318.0017.6312.0011.791.2010.006.0014.20
M14 x 2b14.0013.7321.0020.614.0013.771.4012.007.0016.20
M16 x 216.0015.7324.0023.5816.0015.761.6014.008.0018.20
M20 x 2,520.0019.6730.0029.5320.0019.732.0017.0010.0022.40
M24 x 324.0023.6736.0035.4824.0023.72.4019.0012.0026.40
M30 x 3,530.0029.6745.0044.4230.0029.673.0022.0015.0033.40
M36 x 436.0035.6154.0053.3736.0035.643.6027.0018.0039.40
M42 x 4,542.0041.6163.0062.3142.0041.614.2032.0021.0045.60
M48 x 548.0047.6172.0071.2748.0047.584.8036.0024.0052.60

All the dimensions are measured in millimeters. The table above gives a detailed account of all relevant metric socket head cap screws sizes.

FAQ

Here are some common questions that people ask about metric socket head cap screws.

How are socket head cap screws measured?

Well, like many other boats socket head cap screws are measured from the end of the tread to the plane which represents the bottom of the head of the screw. In this way, you only measure the effective length of the screw that can be used when bolting products or items.

One last IS 2269 (2006) Mean regarding socket head cap screws?

Well, this would be the international standard that is specified and contains characteristics and specifications for the socket head cap screws.

What grade are socket head cap screws?

These screws are not graded designated but as standard they are 20% stronger than a grade 8 head cap screw. Also, they are 50% stronger than grade 5 hex cap screw.

 

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