EN 1662:1997

Overview

The EN 1662:1997 standard, titled Hexagon bolts with flange - Small series (ISO/DIS 15071:1996, modified), is a European Standard developed by CEN. It specifies the technical requirements for hexagon flange bolts in small series production. This standard covers bolts with thread sizes ranging from M5 to M16 and includes three property classes: 8.8, 10.9, and A2-70.

Hexagon flange bolts are essential fastening elements widely used across various mechanical and structural applications due to their integrated flange providing a larger bearing surface. EN 1662:1997 ensures quality, interchangeability, and compatibility of these bolts within European and international supply chains.

Key Topics

• Thread Sizes: Specifies bolts with metric threads from M5 up to M16.
• Property Classes: Covers mechanical strength and material quality with classes 8.8 (medium carbon steel, quenched and tempered), 10.9 (high strength), and A2-70 (stainless steel).
• Small Series Production: Focuses on bolts produced in limited quantities, which is critical for specialized industrial or maintenance requirements.
• Dimensional and Physical Specifications: Defines essential dimensions, tolerances, flange design, and mechanical properties ensuring consistent bolt performance.
• Compatibility: Incorporates modifications based on ISO/DIS 15071:1996, adapted for European manufacturing and application standards.
• Prohibition of Reproduction: The original document specifies that reproduction in whole or in part is not allowed without authorization, emphasizing intellectual property compliance.

Applications

EN 1662:1997 hexagon flange bolts in small series are used in industries and applications such as:

• Mechanical Engineering: Assembly of machinery where reliable fastening with integrated flange support is necessary.
• Automotive Industry: For securing components requiring high tensile strength and corrosion resistance.
• Construction: Structural fastening where precision and mechanical strength classes are critical.
• Maintenance and Repair: Small batch bolts facilitate replacement and refurbishment tasks requiring standardized parts.
• Stainless Steel Applications: A2-70 class bolts offer corrosion resistance suitable for environments exposed to moisture or chemicals.

The standard ensures compatibility with machinery components and equipment requiring durable fastening solutions while maintaining ease of installation due to the flange feature reducing the need for washers.

Related Standards

When working with EN 1662:1997, consideration of related standards enhances understanding and ensures comprehensive compliance:

• ISO/DIS 15071:1996 - The original international standard for hexagon flange bolts, which EN 1662:1997 modifies for European contexts.
• EN ISO 898-1 - Covers mechanical properties of fasteners made of carbon steel and alloy steel, correlating with property classes mentioned in EN 1662.
• EN 14399 - Pertains to high-strength structural bolting assemblies, relevant for high-strength classes like 10.9.
• EN ISO 3506 - Focuses on mechanical properties of corrosion-resistant stainless steel fasteners like property class A2-70.
• ISO 4014 - General specifications for hexagon bolts, which provide foundational dimensions used in conjunction with EN 1662.

Summary

EN 1662:1997 provides clear and precise specifications for hexagon bolts with flange in small series, focusing on size ranges M5 to M16 and high-quality property classes. This standard is essential for manufacturers, engineers, and maintenance professionals requiring reliable, standardized bolts for mechanical and structural applications. Adhering to EN 1662 ensures product quality, interchangeability, and adherence to European and international fastener regulations.

Keywords: hexagon bolts with flange, EN 1662:1997, small series bolts, metric thread bolts, property class 8.8, property class 10.9, A2-70 stainless steel bolts, European bolt standard, CEN fastener standards, ISO/DIS 15071, mechanical fastening, bolt specifications, flange bolt applications.