These screws are integral in various industries, ensuring strong and secure connections without the need for pre-drilled holes, and offer versatility, ease of use, and reliability across multiple sectors. The standard covers various sizes from ST2.9 to ST6.3, and is part of a broader series on fasteners that also addresses pan head and countersunk head screws. Specifications cover head diameter, recess type, and drilling point details, with screws typically made from steel and finished in plain or electroplated coatings, while mechanical properties such as hardness and tensile strength ensure the screws perform effectively under different conditions. Because the raised countersunk profile is used in demanding fastening applications, consistent compliance with this standard has a direct bearing on joint reliability over the long term.

Tests

Mandatory Tests:

1. Dimensional Check (Head Diameter, Recess Type, Drilling Point)

2. Material Composition Analysis

3. Tensile Strength Test

4. Hardness Test

5. Drive Recess Performance Test

Optional Tests:

1. Surface Finish/Electroplating Inspection

2. Corrosion Resistance Test

Benefits of Obtaining ISI Mark for Cross Recessed Drilling Screws – Raised Countersunk Head

Here are the key benefits of getting ISI Mark certification:

• Government Quality Assurance: The ISI mark confirms the screws meet the dimensional, material, and mechanical benchmarks set by BIS for raised countersunk head drilling screws.

• Mandatory Compliance: BIS certification is mandatory for these screws under the Cross Recessed Screws (Quality Control) Order, 2024, issued by the DPIIT.

• Enhanced Market Competitiveness: Adherence to this standard ensures manufacturers produce high-quality, durable fasteners that meet both domestic and international market requirements.

• Consumer Trust: Certified screws are trusted for their precision, strength, and reliability, enhancing consumer confidence and market acceptance.

• High-Performance Suitability: Screws must pass stringent tests verifying their suitability for high-performance applications across industries such as construction, automotive, and machinery.

Frequently asked questions (FAQ)

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