Side-by-Side Comparison
Metric Threads (ISO)
M2.5 Thread vs. M6 Thread
Comparing 2 standards across 7 specifications. 7 key differences identified.
Comparing:
M2.5 Thread
M6 Thread
M2.5 is an ISO metric machine screw thread with a nominal major diameter of 2.5 mm and a standard coarse pitch of 0.45 mm. Requiring a 2.05 mm tap drill, it is the standard fastener for 2.5-inch SATA/SAS hard drive caddies, Raspberry Pi mounting standoffs, and consumer drone frames.
M6 is an ISO metric machine screw thread with a nominal major diameter of 6.0 mm and a standard coarse pitch of 1.00 mm. Requiring a 5.00 mm tap drill, it is the global standard for EIA-310 19-inch datacenter server rack cage nuts, the smallest VESA MIS-F 200×200 mm TV mounts, and automotive body panels.
Specification Comparison Table
7 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nominal Major Diameter
|
2.50 mm | 6.00 mm |
|
Standard Coarse Pitch
|
0.45 mm | 1.00 mm |
|
Fine Pitch (Optional)
|
0.35 mm | 0.75 mm |
|
Tap Drill Diameter
|
2.05 mm (75% thread engagement) | 5.00 mm (75% thread engagement) |
|
Minor Diameter (Internal)
|
2.013 mm | 4.917 mm |
|
Tensile Stress Area
|
3.39 mm² | 20.1 mm² |
|
Common Drive Size
|
PH1 / T8 / 2.0mm Allen | 10mm Hex / 5.0mm Allen / T30 |