Side-by-Side Comparison
Metric Threads (ISO)
M12 Thread vs. M8 Thread
Comparing 2 standards across 9 specifications. 9 key differences identified.
Comparing:
M12 Thread
M8 Thread
M12 is an ISO metric machine screw thread with a nominal major diameter of 12.0 mm and a standard coarse pitch of 1.75 mm. Requiring a 10.20 mm tap drill, it provides high tensile clamping strength for automotive wheel hubs, structural steel connections, and industrial machine tool mounts.
M8 is an ISO metric machine screw thread with a nominal major diameter of 8.0 mm and a standard coarse pitch of 1.25 mm. Requiring a 6.80 mm tap drill, it is the standard fastener for VESA MIS-F large TV wall mounts (400×400 mm and 600×400 mm), automotive suspension brackets, and heavy furniture.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Nominal Major Diameter
|
12.00 mm | 8.00 mm |
|
Standard Coarse Pitch
|
1.75 mm | 1.25 mm |
|
Minor Diameter (Internal)
|
10.106 mm | 6.647 mm |
|
Tensile Stress Area
|
84.3 mm² | 36.6 mm² |
|
Common Drive Size
|
19mm (ISO) / 18mm (DIN) / 10.0mm Allen | 13mm Hex / 6.0mm Allen / T40 / T45 |
|
Fine Pitch (Automotive)
|
1.50 / 1.25 mm | — |
|
Tap Drill Diameter (Coarse)
|
10.20 mm (75% thread engagement) | — |
|
Fine Pitch (Optional)
|
— | 1.00 / 0.75 mm |
|
Tap Drill Diameter
|
— | 6.80 mm (75% thread engagement) |