Metric fasteners are fasteners which are made and labelled as per a global standard of measurement. That global standard is determined by the International Organization for Standardization (ISO), based in Geneva, Switzerland. That globally accepted standard is strictly based on the metric system.
There are a large number of ways in which fasteners are measured and produced for size. It is of immense that there are so many kinds of standard for fasters and screws, with the countless number of products and tools relying on screws to remain fast together. The United States, Canada and The United Kingdom invented the standards for fasteners in the year 1949, called the Unified Thread Standard.
They were in hope that it would become the global standard. But the ISO standards eventually came out as a winner. The UK no longer makes use of that standard, and Canada is presently midway through the changeover to the ISO metric fastener standard. In the contemporary times, more than 40% of screws and products made in the country such as United States are manufactured with metric faster systems.
Now let’s come to BIS Hallmarking. To protect consumer rights and make red hot sure that true value for the hard-earned money is delivered to the end user, the Govt. of India created and authorized a single body, called BIS (Bureau of Indian Standards) in the month of April 2000 while authenticating and verifying purity standards of different types.
Authentic hallmarked items constitute the following necessary elements made as per BSI Standards–
- The BIS logo
- The purity or fineness standard: This is pointed by a 3 digit special number out of a set of 6 pre-defined values.
- It clearly defines the purity of the product in part-per-thousand-format – 958, 916, 875, 750, 585, and 375.
- For example, a BIS 916 hallmark simply stands for a purity level of 916 per 1000, or 91.6%, which corresponds to 22 Karats.
- For example, silver – the range of purity and finesses starts from 800 and goes up to 999.9, or 99.9%.
- Logo of the assaying centre and the maker’s identification mark.
- The exact date of hallmarking.
The manufacturers need licenses which authenticate their claim of putting on sale BIS-Hallmarked highly precious metal products. Carried out at independent BIS hallmarking and assaying centers, this entire procedure requires certification of gold, silver and other metal item through some minute purity tests.
There are companies in India that have established themselves as the leading providers of national and global standards in India. One such company is BSB Edge. Ever since its inception four decades ago, this company has steadily grown in stature to become an institution par excellence winning the trust of more than 20,000 customers.