ISO 4029:2026 has been officially released, upgrading the global standard for internal hexagonal set

I. Key Updates in the Standard

1. Significant expansion of size range

Steel: M1.6–M30 (original M1.6–M24)
Stainless steel: M1.6–M24 (original M1.6–M20)
Covering more large-diameter fastening scenarios in heavy machinery, wind power equipment, etc.

2. Comprehensive tightening of tolerances and precision

Thread tolerance upgraded to 6H/6g, with more precise mating
Reduced tolerance for head and cone end dimensions, reducing assembly deviation
Increased surface roughness requirements, suitable for high-speed automated assembly.

3. Mandatory upgrade of identification and traceability

All specifications must indicate specifications, material, strength grade, manufacturer batch number
Small specifications (≤M6) allow laser micro-marking to ensure full chain traceability
Products for export to the EU and North American markets must also provide material certificates and batch traceability reports.

4. New green manufacturing and waste disposal regulations

Clarify the classification and recycling requirements for production process waste (such as cut-off material heads)
Recommend low-energy cold heading process and environmentally friendly coatings (such as chrome-free passivation)
Adapt to EU CBAM carbon footprint accounting and global green procurement trends.

II. Impact on Global Fastener Trade

Increased compliance threshold for exports: European and American customers have begun to review suppliers according to the new standard. Suppliers that do not meet the requirements will face order downgrade or rejection, especially in the automotive and precision machinery fields.
Minor adjustment of supply chain costs: The increase in precision and identification upgrade leads to a 3%-5% increase in production costs, but can reduce the risks of after-sales rework and quality claims in the long term.
Market competition reshuffling: Enterprises with advanced precision manufacturing, automated inspection, and carbon footprint management capabilities will seize the high-end market, while small manufacturers need to accelerate equipment upgrading and standard certification.

III. LONGJOY's Standard Adaptation and Customer Value

As a professional manufacturer specializing in export of fasteners for 18 years, LONGJOY completed the full product line upgrade of ISO 4029:2026:
Full specifications of internal hexagonal set screws (M1.6–M30) are mass-produced according to the new standard, providing material certificates, size inspection reports, and carbon footprint statements;
Adopting high-precision cold heading and CNC thread processing to ensure 6H/6g tolerances and consistency;
Supporting laser micro-marking and batch traceability, adapting to the traceable supply chain requirements of European and American customers;
Simultaneously optimizing the waste recycling process for environmental coatings and waste recovery, helping customers meet CBAM carbon compliance and global green procurement standards.