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What is M2 and M3 screw size?

What is M2 and M3 screw size?

M1, M1. 2, M2, M2. 5, M3 or M4 – Package of 5 Pieces

Metric Pan Head Screw Size Options
Screw Size Diameter Material
M2 M2 (2mm) 304 Stainless
M2.5 M2.5 (2.5mm) 304 Stainless
M3 M3 (3mm) 304 Stainless

Is M3 screw metric?

The size of a metric screw or bolt is specified as diameter, pitch and length, in millimeters (millimeters is abbreviated “mm”). For nuts, size will appear as diameter and pitch….Table 3.

Metric Closest Inch
M1.4-0.3 0-80 (Larger)
M2-0.4 1-64 (Smaller)
M2.5-0.45 3-56 (Larger)
M3-0.5 4-48 (Smaller)

What size is a 3 mm screw?

Metric Imperial Screw Conversion Chart

Diameter (mm) Length (mm) Closest Imperial Size Gauge x Length
3mm 12 4 x 1/2
16 4 x 5/8
20 4 x 3/4
25 4 x 1

What size is a machine screw?

Machine screws are often found in sizes of: 0, 1, 2, 3, 4, 5, 6, 8, 10, 12, 14—the larger the number, the larger the screw. Machine screws, but especially caps screws and bolts, can range from 1/4 inch up to 3 inches or more.

How big is the head of a M3 screw?


Size Diameter Head Height
M3-0.5 3.00 3.00
M4-0.7 4.00 4.00
M5-0.8 5.00 5.00
M6-1.0 6.00 6.00

How wide is M3 thread?

ISO Metric Thread Dimensions

Thread Size Nominal Diameter (mm) Effective Diameter (mm)
M3 3.0 2.675
M3.5 3.5 3.110
M4 4.0 3.545
M4.5 4.5 4.013

What size is M3 in MM?

Tap size Basic major dia (mm) Basic major dia (inch)
M3 x 0.5 3mm .1181
M3.5 x 0.6 3,5mm .1378
M4 x 0.7 4mm .1575
M5 x 0.8 5mm .1969

What diameter is M3?


Tap size Basic major dia (mm) Basic major dia (inch)
M2 x 0.4 2mm .0787
M2.5 x 0.45 2,5mm .0984
M3 x 0.5 3mm .1181
M3.5 x 0.6 3,5mm .1378

What screws do I use for power supply?

To secure the PSU to the casing, you’ll need four screws. The screws are hexagonal and 6-32 threaded. In addition, you’ll need 3.5″ screws for HDDs, expansion cards, and the case panel, as well as M3-0.50 screws for optical discs, floppy drives, and motherboards.