- bolt-expansion-dat - bolt-dat - mechanical-parts-dat - screw-dat - thread-dat - nut-dat - washer-dat
1. Metric Sizes (Most Common Globally)
In the metric system, the "M" number indicates the outer diameter of the bolt thread in millimeters.
| Size | Drill Bit Diameter | Common Lengths | What It's Used For |
|---|---|---|---|
| M6 | 10 mm | 50mm – 80mm | Light duty: Hanging kitchen cabinets, bathroom fixtures, mirror frames, lightweight wall shelving. |
| M8 | 12 mm | 60mm – 100mm | Medium duty: TV wall mounts, air conditioner outdoor brackets, water heaters, railings. |
| M10 | 14 mm | 70mm – 120mm | Heavy duty: Garage racks, heavy doors, swing sets, awnings, pull-up bars. |
| M12 | 16 mm | 80mm – 150mm | Extra heavy duty: Structural anchoring, steel beam brackets, heavy machinery installation. |
Crucial Rule for Metric: The drill bit size you need to drill into the concrete is larger than the bolt size because it needs to fit the entire outer expansion sleeve. For example, an M6 bolt usually requires a 10mm masonry drill bit.
6 x 30 ~ 50 ~ 100
wall amount plan
- use 8x M6
- use 6x M8
- use 4x M10
- use 4x M12