What is the pitch of a thread?
The pitch of a thread is the distance between two adjacent threads and is measured in millimetres. The most common thread diameter and pitch combinations found in plant and machinery are listed in the table below: Size.
How many standard sizes are there in nuts?
There are nineteen standard sizes – known as the ‘preferred ‘ sizes and ten less commonly used (the so-called ‘non-preferred’) sizes. The situation on is almost as complex with metric nuts which come in a wide variety of types (full, thin, nyloc, castellated…..) and 5 strength grades as well as the same range of sizes.
Where are the markings on a bolt?
Usually the markings are on the top of the bolt head but sometimes they are on the side. The first number gives the breaking strength of the steel in the bolt. In round terms it is in 10’s of kg per square millimeter of the bolt.
Can a drill hole be straight?
Similarly, if the thread is made by drilling and tapping a hole the size of the drilled hole may vary depending on how accurately the drill has been sharpened and how worn the drill is, the hole might not be precisely straight and the tap might be blunt or worn.
What are the grades of metric nuts?
On the head of each bolt are two numbers separated by a decimal point, the full list includes ten grades from 3.6 to 14.9 but in plant and machinery only grades 8.8, 9.8, 10.9 and 12.9 are normally found .
How much weight does a grade 12.9 bolt carry?
For example, a grade 12.9 bolt will not snap until every square millimetre of the bolt cross section is carrying a load of at least 120 kg. Similarly a grade 8.8 bolt will not snap until it is carrying a load of 80kg per square millimetre.
Where is the strength grade on a metric nut?
Where the grade is given as a number it may be stamped on the top of the nut or on one of the flat sides.
What is the A4 size?
The A4 size is a commonly used paper size for writing paper, stationery, cards and documents. The size A4 reflects the size of a single sheet of paper. There are different standards for the sizes of paper. A4 size is part of the A standard. The A standard is the international standard.
How big is an A4 envelope?
Proportions of the A4 size compared to other sizes. An A4 has a surface area of 210 x 297 millimetres. In inches, this is 8.27 x 11.69 inches. An A4 paper fits in a C4 envelope without having to fold the paper.
What is the A4 standard?
A4 size is part of the A standard. The A standard is the international standard . The A standard is part of the “A”, “B” and “C” series of paper sizes of the ISO 216. The ISO 216 is the international standard for a sheet of paper. North America and parts of Central and South America use other paper sizes such as “Letter” and “Legal”.
What happens when you fold a paper horizontally?
If you fold a sheet of paper horizontally into two equal pieces, two pieces with the same ratio are created. An A4 is half the size of an A3. When you fold an A4, you have twice an A5. Size table with the proportions of the ISO A series.
What is the ISO 216 standard?
Finally, in addition to the A sizes, the ISO 216 standard includes B and C paper sizes. The B-series paper sizes and the C-series paper sizes are made to cover paper sizes that do not fall under the A-series.
Knitting Needle Sizes Chart for US and UK
This knitting needle size conversion chart compares knitting needles in the US and UK, with crochet hook sizes thrown in for good measure!
Japanese Needle Size Chart
Note that Japanese needles have a different metric size than US and UK needles.
What is My Knitting Needle Size?
If you have knitting needles from all over the world or of unknown origins, your best bet for identifying their size is by using a knitting gauge.
Knitting Needle Size Chart Printable
To make your knitting easier, I’ve made a printable of these charts, which you can download below.
What is the difference between metric and standard bolts?
What is standard and metric? For both metric and standard bolts, the head size is the distance across the flats. For standard bolts, the head size is measured in inches or fractions of an inch. For metric bolts, head size is measured in millimeters. However, metric bolt head size is measured in millimeters.
How many millimeters equal one centimeter?
Each millimeter is one-tenth of a centimeter, so ten millimeters equals one centimeter. Before you start measuring, make sure that one end of the object is lined up with the 0 cm mark on the ruler.
