EN 4008-004:2017

Overview

EN 4008-004:2017 is a European standard developed by CEN under the Aerospace and Defence Industries Association of Europe (ASD-STAN). It specifies the product standard for dies used with the M22520/5-01 crimping tool. These dies are designed to crimp electrical contacts according to the requirements defined in EN 4008-002. This standard is vital for ensuring consistent and reliable electrical connections in aerospace applications, focusing on the mechanical and dimensional characteristics necessary for optimal tool performance.

Key Topics

• Scope and Purpose
  Defines the characteristics and requirements for crimp dies compatible with the M22520/5-01 crimping tool, which is widely used to terminate electrical contacts in aerospace electrical and optical connection assemblies.

• Normative References
  EN 4008-004 references related standards such as EN 2591-100 (general terms and definitions), EN 4008-001 (technical specifications for crimping tools and accessories), EN 4008-002 (product standards for crimped electrical contacts), and SAE AS 22520/5-01 (technical requirements for the hand crimping tool).

• Design and Dimensions
  Precise engineering specifications are given for die design, including location of undercuts on die lugs for secure mounting, and contact positioning to ensure accurate crimps. Illustrations and dimensions for jaws, indenter shapes, and other critical features ensure repeatability and compatibility.

• Marking and Designation
  Unique identification markings for dies are specified to facilitate traceability and quality control in manufacturing and maintenance processes.

• Technical Specifications
  Detailed performance criteria link back to EN 4008-001, ensuring dies meet mechanical strength, durability, and precision requirements.

Applications

EN 4008-004:2017 plays a crucial role in the aerospace sector, particularly in the assembly and maintenance of electrical and optical connections in aircraft and spacecraft. Key applications include:

• Electrical Wire Harness Assembly
  Ensures robust crimped connections for wiring harnesses subjected to rigorous environmental and mechanical stresses in aerospace vehicles.

• Optical Connection Interfaces
  Supports the reliability of optical fiber connections by enabling secure and repeatable crimps with accompanying optical contacts.

• Maintenance and Repair
  Standardized crimp dies facilitate consistent tool replacement and repair toolkits, improving operational uptime and safety.

• Quality Assurance
  Enables manufacturers and maintenance providers to meet aerospace quality standards for connectivity hardware, ensuring compliance with industry requirements.

Related Standards

EN 4008-004:2017 is part of the EN 4008 aerospace series, which covers a comprehensive range of electrical and optical connection elements:

• EN 4008-001 - Technical specifications for crimping tools and associated accessories
• EN 4008-002 - Product standards for crimped electrical and optical contacts
• SAE AS 22520/5-01 - Defines the crimping tool type for large contacts, used as a reference for the dies described in EN 4008-004

Other associated standards that support terminology and testing practices:

• EN 2591-100 - General terms and definitions regarding electrical connections in aerospace
• Industry guidelines on crimping processes and quality criteria for aerospace electrical systems

Keywords: EN 4008-004:2017, aerospace crimping tools, M22520/5-01 die, electrical contacts, crimp die standard, aerospace electrical connection, crimping tool accessories, CEN aerospace standards, electrical and optical connection elements, aerospace wire harness crimping.