Drywall screws are used to secure gypsum plasterboards and reinforced gypsum boards, and offer superior tensile strength and holding power compared to traditional nails. These screws feature a flat or bugle-shaped head to sit flush with the surface of the drywall, ensuring a neat and smooth finish, and are engineered to create a secure bond while minimizing damage to the drywall material. The standard requires a surface hardness of 550 HV 0.3 to 800 HV 0.3 and a core hardness of 300 HV 0.1 to 450 HV 0.1, along with specific torque requirements for different thread sizes.

Tests

Mandatory Tests:

1. Dimensional Check (Thread Diameter, Length, Head Type)

2. Surface Hardness Test

3. Core Hardness Test

4. Torque Test

5. Tensile Strength Test

6. Corrosion Resistance Test

Optional Tests:

1. Pull-Out Strength Test

2. Coating Inspection (Phosphate/Electroplated)

Benefits of Obtaining ISI Mark for Drywall Screws

Here are the key benefits of getting ISI Mark certification:

• Government Quality Assurance: BIS certification for drywall screws signifies compliance with essential quality and performance standards.

• Mandatory Compliance: Products categorized as Cross Recessed Screws must comply with IS 18507:2024 and display the Standard Mark under a license from the Bureau as per Scheme-I of Schedule-II to the BIS (Conformity Assessment) Regulations, 2018.

• Enhanced Market Competitiveness: Certified screws are widely accepted in the market, making it easier for manufacturers to expand their reach and establish a reputation for high-quality products.

• Consumer Trust: BIS certification enhances product credibility, ensures compliance with regulatory standards, and fosters customer trust.

• Consistency Across Batches: The BIS QCO sets out precise dimensional and material specifications to ensure consistency across all products, ensuring uniform performance across batches.

Frequently asked questions (FAQ)

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