Titan39/Omni10.5 Combo

[djwoo]

US 1/2" is more by a grand total of 0.7 mm

In fact 1/2 of an inch is exactly 12.5mm. But in plywood is about 11 mm. 3/4 of an inch is 19 mm, but in plywood is 15mm.

[SoundInMotionDJ]

In fact 1/2 of an inch is exactly 12.5mm.

False.

1" is exactly 25.4 mm. That is a "by definition" kind of thing.

So, 1/2" is exactly 12.7 mm.

See: http://en.wikipedia.org/wiki/Units_of_measurement

Both the Imperial units and US customary units derive from earlier English units. Imperial units were mostly used in the British Commonwealth and the former British Empire. US customary units are still the main system of measurement in the United States despite Congress having legally authorized metric measure on 28 July 1866,[1] as amended by Public Law 110–69 Aug 9, 2007. Some steps towards US metrication have been made, particularly the redefinition of basic US units to derive exactly from SI units, so that in the US the inch is now defined as 0.0254 m, and the avoirdupois pound is now defined as 453.59237 g.

--Stan Graves

[Bill Fitzmaurice]

In fact 1/2 of an inch is exactly 12.5mm.

False.

1" is exactly 25.4 mm. That is a "by definition" kind of thing.

So, 1/2" is exactly 12.7 mm.

See: http://en.wikipedia.org/wiki/Units_of_measurement

Both the Imperial units and US customary units derive from earlier English units. Imperial units were mostly used in the British Commonwealth and the former British Empire. US customary units are still the main system of measurement in the United States despite Congress having legally authorized metric measure on 28 July 1866,[1] as amended by Public Law 110–69 Aug 9, 2007. Some steps towards US metrication have been made, particularly the redefinition of basic US units to derive exactly from SI units, so that in the US the inch is now defined as 0.0254 m, and the avoirdupois pound is now defined as 453.59237 g.

--Stan Graves

All I know is that the '1/2 inch' US/Canadian stuff isn't as thick as Finnish/Russian BB.

[Harley]

All I know is that the '1/2 inch' US/Canadian stuff isn't as thick as Finnish/Russian BB.

All I know is that BB isn't anywhere near as thick as some of the idiots running our government departments here ...up until a couple of weeks ago anyhow!