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Fasteners rarely get attention until something goes wrong. A loose panel, a failed joint, or a structural complaint often leads back to one small screw. Because of this, Indian regulators have tightened control on certain fasteners, including cross recessed drilling screws with tapping screw thread and raised countersunk head.
These screws are now covered under IS 18471 (Part 3): 2023, and BIS ISI Mark registration is no longer a choice for manufacturers and importers. If the product falls under this scope, certification is expected. No mark, no sale. It is that simple, though many businesses still realise it late.
IS 18471 (Part 3) applies to self-drilling screws designed to drill, tap, and fasten in one operation. These are not ordinary machine screws.
The screws covered under this part have:
The raised countersunk head is important. It allows the screw to sit almost flush, but still give a slight projection for better load distribution. This design is commonly used in metal sheets, enclosures, panels, and light structural work.
Because these screws are often used without pre-drilled holes, any defect in drilling point, thread shape, or head angle can cause installation failure. That risk is the reason this product is now regulated.
BIS ISI Mark Registration for Cross Recessed Tapping Screws IS 18480
This Indian Standard is aligned with ISO 15483:1999, but it is enforced under Indian law. Its main objective is consistency. Not marketing quality, but mechanical reliability.
The standard specifies requirements for:
Even small deviations matter here. In real inspections, screws often fail due to shallow recess depth or poor drilling point geometry. The standard tries to prevent exactly that.
Under the applicable Quality Control Order, fasteners covered by IS 18471 (Part 3): 2023 must bear the ISI mark once enforcement begins.
Without BIS certification:
Many businesses assume fasteners are low-risk products. BIS does not see it that way. Once a product is notified under QCO, compliance is compulsory. There is no workaround.
The requirement applies to more than just Indian factories.
You must obtain BIS ISI registration if you are:
Foreign manufacturers must appoint an Authorised Indian Representative (AIR). This AIR is legally responsible for compliance, inspections, and communication with BIS. Choosing an unreliable AIR often creates problems later.
BIS certification under Scheme-I is a structured process. It is not fast, and it is not only paperwork.
The process usually involves:
Product samples are sent to a BIS-recognised lab. Tests verify:
BIS officers visit the manufacturing unit. They check:
If results are satisfactory BIS issues a licence allowing use of the ISI mark on the product and packaging
After licence grant, inspections continue. Many people forget this part. BIS does not stop watching once approval is given.
The QCO for fasteners introduces mandatory certification in phases. Timelines may vary depending on:
Some micro or small units receive temporary relaxation. These are not permanent exemptions. Once the deadline passes, enforcement begins. I have seen businesses stuck with unsellable stock because they waited too long.
Apart from legality, there are real business benefits.
ISI-certified fasteners:
For exporters, alignment with ISO-based Indian standards also simplifies technical documentation. This saves time later, even if it feels painful at the start.
IS 18471 (Part 3): 2023 is not a theoretical document. It reflects real problems seen in the field. Stripped recesses, broken drilling tips, and thread failures are common reasons for complaints.
BIS certification forces manufacturers to control these issues before the product reaches the market. That is the entire point. If you need specialized help, get in touch with experts from Agile Regulatory today!
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Nishi Chawla
10 Feb, 2026
Nishi Chawla
10 Feb, 2026
Vanshika Mathur
09 Feb, 2026
Divya Saxena
09 Feb, 2026
Vanshika Mathur
06 Feb, 2026
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