Side-by-Side Comparison
Metric Threads (ISO)
M10 Thread vs. M2.5 Thread
Comparing 2 standards across 9 specifications. 9 key differences identified.
Comparing:
M10 Thread
M2.5 Thread
M10 is an ISO metric machine screw thread with a nominal major diameter of 10.0 mm and a standard coarse pitch of 1.50 mm. Requiring an 8.50 mm tap drill, it is standard in automotive engine mounts, suspension control arms, motorcycle rear-view mirrors, and commercial HVAC hanging brackets.
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.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nominal Major Diameter
|
10.00 mm | 2.50 mm |
|
Standard Coarse Pitch
|
1.50 mm | 0.45 mm |
|
Minor Diameter (Internal)
|
8.376 mm | 2.013 mm |
|
Tensile Stress Area
|
58.0 mm² | 3.39 mm² |
|
Common Drive Size
|
17mm (ISO) / 16mm (DIN) / 15mm / 8.0mm Allen | PH1 / T8 / 2.0mm Allen |
|
Fine Pitch (Automotive Standard)
|
1.25 / 1.00 mm | — |
|
Tap Drill Diameter (Coarse)
|
8.50 mm (75% thread engagement) | — |
|
Fine Pitch (Optional)
|
— | 0.35 mm |
|
Tap Drill Diameter
|
— | 2.05 mm (75% thread engagement) |