Raised countersunk head screws with Type H or Type Z cross recess are designed for applications requiring a partially recessed head that offers a sleek, low-profile finish, providing a flush fit and enhanced aesthetic appeal, while the cross recess allows for efficient torque transmission during installation. The standard specifies detailed dimensional requirements covering the diameter and height of the raised countersunk head, thread length, pitch, and thread form, along with material specifications addressing strength, corrosion resistance, and durability. These screws are widely used across furniture assembly, construction, and industrial applications because of their durability, ease of use, and fastening capabilities.

Tests

Mandatory Tests:

1. Dimensional Check (Head Diameter, Head Height, Thread Length, Pitch, Thread Form)

2. Tensile Strength Test

3. Torsional Strength Test

4. Hardness Test

5. Load Capacity Test

Optional Tests:

1. Elongation Test

2. Chemical Resistance Test

Benefits of Obtaining ISI Mark for Raised Countersunk Head Screws (Cross Recess)

Here are the key benefits of getting ISI Mark certification:

• Government Quality Assurance: These screws must bear the BIS Standard Mark (ISI Mark), which signifies compliance with quality and safety standards.

• Mandatory Compliance: Goods or articles of Cross Recessed Screws must adhere to IS 7486:2018/ISO 7047:2011 and bear the Standard Mark under a license from the Bureau, in accordance with Scheme-I of Schedule-II to the BIS (Conformity Assessment) Regulations, 2018.

• Enhanced Market Competitiveness: Product Grade A classification signifies screws with high-quality standards, meeting stringent requirements for precision and performance.

• Consumer Trust: This certification is more than just a regulatory requirement — it's a mark of excellence that reinforces consumer trust and enhances product credibility.

• Usability and Compatibility: The design of the raised countersunk head screws with Type H or Type Z cross recess is engineered for compatibility with corresponding tools for efficient installation, enhancing usability across various applications.

Frequently asked questions (FAQ)

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