A metric iso screw thread is designated by the letter m followed by the value of the nominal diameter d the maximum thread diameter and the pitch p both expressed in millimetres and separated by the hyphen sign e g m8 1 25.
M8 bolt head size in mm.
The m3 and m4 nominal screw sizes have two drilled holes spaced 180 degrees apart.
M2 5 thread is tapped thru 15 99 mm in length.
The size of a metric screw or bolt is specified as diameter pitch and length in millimeters millimeters is abbreviated mm.
M3 m3 5 m4 m5 m6 m7 m8 m10 m12 m14 m16 m18 m20 m22 m24 m27 m30 m33 m36 m39.
If the pitch is the normally used coarse pitch listed in iso 261 or iso 262 it can be omitted e g m8.
Available in a range of sizes from m2 to m42 and din 933.
For nuts size will appear as diameter and pitch.
In stock and ready to ship.
Drilled head metric hexagon socket head cap screws normally are not available in screw sizes smaller than m3 nor larger than m36.
The nominal diameter d is specified in mm as part of the bolt designation e g.
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8 mm for m8 bolt.
Bolt diameter mm head wrench size mm ansi iso din.
Choose from our selection of metric allen bolts including alloy steel socket head screws 18 8 stainless steel socket head screws and more.
Stainless steel nylon parts.
Here s what the description means.
Nominal screw sizes m5 and larger have six drilled holes spaced 60 degrees apart unless the purchaser specifies two drilled holes.
This is roughly equivalent to a 5 16 bolt or screw.
There is an exception though if pitch isn t specified the fastener is coarse threaded.
M2 5 thread is tapped thru 9 6 mm in length m3 thread is tapped thru 12 7 mm in length.
Metric bolt head wrench size.
Consider this size m8 1 0 x 20.
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M3 and larger thread is tapped thru 25 4 mm in length.
Shop high quality hex bolts from ita fasteners at the reasonable price.
The standard metric bolt diameters are specified in the standard iso 898 1 tables 4 and 5.
For typical coarse pitch thread bolts the standard sizes are.
Brass aluminum steel parts.