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Fasteners might seem like simple commodity items, but regulators see them differently—especially when they are used in structural or load-bearing applications. Among these, hexagon washer head drilling screws with tapping screw threads have recently been brought under formal Indian standards. Compliance is no longer optional; if your product falls under this scope, it must be BIS-certified before it can be sold or imported in India.
At a glance, these screws look familiar to anyone who works with mechanical assemblies.
They are distinctive because:
These screws are widely used in:
The hex washer design gives better clamping and torque control than simple pan or countersunk heads. Because they are often driven into thin sheet materials, any poor design or manufacture can lead to stripped threads or weak fastening. The new Indian standard exists to prevent exactly those kinds of field failures.
BIS ISI Certification for Caustic Soda IS 252:2013
IS 18476: 2023 is the Indian standard that sets the rules for these fasteners. It is harmonised with ISO 15480:2019, so products conforming to it should also align with international expectations.
The standard addresses the following:
Each of these characteristics has defined limits and tolerances. If a screw falls outside them, it might still hold in a bench test—but it won’t meet the IS standard and so cannot be legally sold with the ISI mark.
ISO 15480:2019 serves as the international reference, and the Indian standard remains consistent with it so firms that already produce to ISO practice get fewer surprises.
India’s Quality Control Orders (QCO) have brought a range of fasteners under mandatory BIS certification. Hexagon washer head drilling screws are among them. Once a product is notified under a QCO:
The intent of the QCO is not to make life difficult for industry but to ensure that products entering the Indian supply chain are consistent, measurable, and safe. Fasteners, especially ones that drill and tap, are subjected to real stresses in the field. Poor quality here isn’t a minor defect—it can cause structural failure.
If you are in this product category, you need certification before selling or importing:
Foreign manufacturers are required to appoint an Authorised Indian Representative (AIR). This person or company acts as the legal liaison with BIS. In practice, choosing a weak or unreliable AIR creates headaches during inspections and testing, so it pays to select one with experience.
BIS ISI for Helmets IS 4151:2015
BIS certification isn’t just a form-filling exercise. It involves real testing and factory verification.
Here’s roughly how it goes:
The manufacturer or AIR submits specifications, drawings, and other product details.
Samples are tested in a BIS-recognised laboratory for:
BIS officials verify whether:
Once tests and inspection are satisfactory, BIS issues a licence. This allows the use of the ISI mark on products and packaging
BIS periodically revisits facilities and can retest market samples to ensure compliance continues.
BIS certification brings several business advantages:
Registering hexagon washer head drilling screws with BIS under IS 18476:2023 is more than a bureaucratic requirement. It reflects a product’s ability to perform reliably under expected load and environmental conditions. This matters because these screws are often mission-critical in metal and structural assemblies. Quality isn’t subjective here; it is defined in measurable terms that matter in the field. If you need help with registration, get in tuch with experts at 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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