Bolt Head Size Metric

Use the dimensions of your bolt to determine the appropriate size nut.

Bolt head size metric.

Head sizes may differ from what is shown due to differences between metric standards length. Hex bolt head dimensions. Bolt diameter mm head wrench size mm ansi iso din. Large diameter nuts and bolts.

The m3 and m4 nominal screw sizes have two drilled holes. Unc and unf unified inch screw threads ansi asme b1 1 unified national thread unc coarse series and unf fine series. Metric hex bolt diameters and thread pitches mm 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220. The shank size of bolts affixed into a solid surface can be determined by measuring the head s dimension and dividing by 1 8.

T slots and t nuts metric sizes standard metric t slots and t nuts. Print this page. The head makes 12 points of contact with a wrench to handle more torque than a socket head or hex head screw. Metric bolt head wrench size.

The following table of hex bolt head dimensions was adapted from asme b18 6 7m table 14 dimensions of hex head machine screws this table is used for smaller size hardware. Us bolts head and wrench sizes hex bolt lag bolt square bolt and heavy hex bolt. Definitions of terms are located below the chart. Stainless nuts and bolts.

All dimensions are in millimeters. Drilled head metric hexagon socket head cap screws normally are not available in screw sizes smaller than m3 nor larger than m36. Metric stud bolt to nut size chart. All tolerances are plus and minus.

Our metric stud bolt to nut table is meant to help determine the correct size bolt or nut for your purpose. Metric socket head cap screws size table. The axis of the head shall be located at a true position relative to the axis of the screw shank within a tolerance zone having a diameter equivalent to 6 of the specified maximum head diameter or the specified maximum width across flats of hex and hex flange heads regardless of feature size. Exotic materials specialty fasteners.

Length is measured from under the head to the end of the bolt note. Engineering ansi hardware design data engineering metric hardware design data. Where l is the total bolt length and d nom is the nominal bolt diameter. Threaded bolt stress area threaded bolts tensile stress area.

An m10 bolt with a 10 mm shank features a hex head that s 16 mm across.