Once I got home I could measure these nails, they are 75 mm long, however because they are serrated, the diameter of the actual nail shaft is anywhere from 3,1 on the uncorrugated part to 3,3 mm on the corrugated part. Definitely not 3,05.
Mike On 13/07/2013, at 09:39 , "Kilopascal" <[email protected]> wrote: > Mike, > > At work we own a heavy-duty stapler that was made decades ago in the UK. The > original staples for it have sizes in rounded millimetres. When we went to > buy new ones from a local source, the sizes were described in inch fractions > that didn't correspond to the original metric from the original source. The > replacements are not from the original manufacturer. If I remember, I'll > check on Monday what the sizes and name of the stapler are. > > But I've seen this type of nonsense before. I've seen a product that was > described as 25 mm converted to 1 inch and the 1 inch back converted to 25.4 > mm, even though the product was still 25 mm. The same thing happened with a > fuse block to hold 5 x 20 mm fuses. The mounting hole centres between > adjacent mounting holes was 10 mm, but in the Bussmann catalog at the time > showed inches first as 0.3937 inches (or something similar) and the metric > 9,90 mm (or something close, as I can't remember exactly). In other words, > the inches were 'rounded" to some degree and the metric was recalculated from > modified inches, even though the part has not physically change. This is > going back into the early '90s. > > Bussmann is notorious for using inches (even if they resell a metric product) > as the basis and if it does show a metric conversion it is just a conversion > of the inches it uses even if neither dimension is true. > > Also think about the 600 mL soda pop bottle called as 20 ounces and 591 mL. > Is it a true 600 mL fill or is it a 591 ml fill? If the soda pop industry in > the US wants to be different than the world yet have a universal standard to > save costs, why not call the size as 600 mL 20 ounces? The metric and USC > contents declarations don't need to match as long as no one is cheated by > getting less than what is stated. > > Out of curiosity what is the make and model of the nail gun? We can look up > the model and see if the advertisement or technical data describes the nail > as 75 x 3 or 76 x 3.05. Is it possible for you or him to measure one of th > nails? You should be able to see if it is 75 or 76 mm. > > > > [USMA:53069] Nails > > Michael Payne Thu, 11 Jul 2013 05:47:20 -0700 > > A friend of mine has a nail gun (for construction). In the US these nails are > labelled as 3"x 0,120" (76 x 3,05 mm). He just bought the same nail for the > nail gun in the UK packaged as 75 x 3 mm. This just shows how items are > rounded > to the nearest inch and then converted to some odd metric number. When I get > home I'll measure the nail to see what it really measures. > Mike Payne >
