Bolt Head Size Metric

Threaded bolt stress area threaded bolts tensile stress area.

Bolt head size metric.

Us bolts head and wrench sizes hex bolt lag bolt square bolt and heavy hex bolt. Drilled head metric hexagon socket head cap screws normally are not available in screw sizes smaller than m3 nor larger than m36. Metric bolt head wrench size. The diameter between flat sections on a structural metric bolt s head is always 1 8 times the diameter of its shank.

Use the dimensions of your bolt to determine the appropriate size nut. Metric stud bolt to nut size chart. Large diameter nuts and bolts. Square neck carriage bolts medium strength metric class 8 8.

Hex bolt head dimensions. An m10 bolt with a 10 mm shank features a hex head that s 16 mm across. Length is measured from under the head to the end of the bolt note. Stainless nuts and bolts.

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

All dimensions are in millimeters. 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. Engineering ansi hardware design data engineering metric hardware design data. The m3 and m4 nominal screw sizes have two drilled holes.

Exotic materials specialty fasteners. Metric socket head cap screws size table. The bolt chart provides both us and metric stud sizes. The shank size of bolts affixed into a solid surface can be determined by measuring the head s dimension and dividing by 1 8.

Where l is the total bolt length and d nom is the nominal bolt diameter. Print this page. Our metric stud bolt to nut table is meant to help determine the correct size bolt or nut for your purpose. Bolt diameter mm head wrench size mm ansi iso din.

Head sizes may differ from what is shown due to differences between metric standards length.