M3 screw equivalent


Below is a table common fastener sizes and lengths and their US (Inch) decimal and closest fraction equivalent. Note – Metric screw diameters usually start with “M” (M3, M4, M5…), for this chart you can just drop the ‘M’ from the front and add an extra at the back (M3 = 3mm, M4 = 4mm…). * Closest US fraction to metric size

Fastener Conversion Chart
Inch Equivalent Metric Size-PitchISO and IFI Rec.
1- 64 1- 72 M2x 0.4
3- 48 3- 56 M2.5x 0.45
4- 40 4- 48 M3x .5
6- 32 6- 40 M3.5x .6

13 more rows


What size is a M3 screw?

Common M3 Fastener Screw and Bolt Sizes – MonsterBoltsTypeDINHead DiameterM3 Hex Bolts (FT)9336.0mm*M3 Hex Bolts (PT)9316.0mm*M3 Socket Head Cap9125.68mmM3 Low Head Socket Cap79845.5mm4 more rows

What size is M3 in standard?

Table 3.MetricClosest InchM1.4-0.30-80 (Larger)M2-0.41-64 (Smaller)M2.5-0.453-56 (Larger)M3-0.54-48 (Smaller)16 more rows

What size is M3 in Imperial?

Metric Screw SizeRecommended Hole Size for ClearanceRecommended Drill SizeMetric Drill SizeImperial Drill SizeM33.2mm1/8M44.3mm11/64M55.3mm13/643 more rows

What size is M3 in inches?

Tap sizeBasic major dia (mm)Basic major dia (inch)M2.5 x 0.452,5mm.0984M3 x 0.53mm.1181M3.5 x 0.63,5mm.1378M4 x 0.74mm.157524 more rows

Is M3 the same as 6 32?

The M3 is a thinner screw with a finer thread than the #6-32 UNC. This makes it more suitable for fastening into smaller parts and thinner materials requiring good strength in a limited space.

What size is a 3mm screw?

Metric Imperial Screw Conversion ChartDiameter (mm)Length (mm)Closest Imperial Size Gauge x Length3mm124 x 1/2164 x 5/8204 x 3/4254 x 152 more rows

Are M3 and 4 40 the same?

—and reject any change or reform? Let’s now explain how screw threads are designated in metric. The closest size screw in metric to a #4-40 machine screw is M3.

What size is a 3/8 bolt in metric?

9.5US to Metric Conversion TableUS (inches)Metric (millimeters)3/89.57/16111/2139/161415 more rows

How do I know if my screws are imperial or metric?

Metric threads are measured by their pitch. That is the distance from the crest of one thread to the crest of the next measured in millimetres. The pitch of a metric thread can be checked by direct measurement with a metric rule. Imperial threads have their pitch measured indirectly as a given number of teeth per inch.

Is M3 screw 3mm?

Thread Diameter: 3mm(M3).

What does bolt size M3 mean?

Coarse and Fine pitch for the sizes you asked about: M3-0.50 and M3-0.35. M4-0.7 and M4-0.5. M5-0.8 and M5-0.5.

How do I measure screw size?

To measure the diameter of screws and bolts, you measure the distance from the outer thread on one side to the outer thread on the other side. This is called the major diameter and will usually be the proper size of the bolt.

What is the imperial of 3mm?

3mm = almost 1/8 inch.

How do you convert metric to imperial?

1:486:05Converting between Metric and Imperial Units for Length – YouTubeYouTubeStart of suggested clipEnd of suggested clipSo just remember that one inch is approximately equal to 2.5 centimeters that means to convert fromMoreSo just remember that one inch is approximately equal to 2.5 centimeters that means to convert from set inches into centimeters you will times by 2.5.

What is an imperial size?

Miles, feet and inches are old units of length. These are known as imperial units of length but are not now commonly used in maths. There are 12 inches in a foot. An inch is roughly equal to 2.5 centimetres. A foot is roughly equal to 30 centimetres.

What is 3/8ths of an inch in MM?

9.53 mmConversion table Inches to mmDimensions — Inches to MetricDecimal InchesFractional InchesMetric0.375”3/8”9.53 mm0.438”7/16”11.13 mm0.500”1/2”12.70 mm21 more rows

Screw Size Identifiers

Find thread size, screw size, thread pitch, diameter, or drill bit size.

Wall-Mount Thread-It Screw, Bolt, and Nut Size Identifiers

Mount to a wall for easy access, and thread your fastener into holes or onto plugs for quick and accurate size identification.

Thread-It Screw, Bolt, and Nut Size Identifiers

Thread your fastener into holes or onto plugs for quick and accurate size identification.

Threads per Inch and Thread Pitch Identifiers

Determine threads per inch and thread pitch on a variety of external and internal threads.

Reference Charts

Style C charts list specifications and torque tightening guidelines for alloy steel socket screws.

What does Mn mean in screw?

Mn for a number n means that the diameter of the screw, projected onto the transverse plane, is n milimeters – including the threading. The “M” stands for “Metric” (as opposed to British-imperial units). Remember the Mn designation does not tell you what the length of the screw (along its axis) is.

What does the M stand for in military?

The “M” stands for “Metric” (as opposed to British-imperial units).

What is the description of a thread?

A full description is like M 6 – 1 X 25 Which describes the outer diameter (6) , the distance from one thread to the next (1) (pitch) and the length (25) (all in millimeters.)

What is ST screw?

ST – Self Tapping; These screws have a tip that will allow them to be screwed into (typically wood) without a pilot hole being drilled. This saves a lot of time!

Is the metric system simpler than the imperial system?

As you can imagine, the metric system is a little simpler to understand for the uninitiated however if you’re not used to it, or still working in Imperial it can be a little tricky.

Do you put metric and imperial on screws?

Most manufacturers put both the metric and imperial size on the box of screws which is very helpful, however when purchasing online, many retailers do not . This is largely because the title of the product becomes too long and cumbersome, so something has to go.


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