SIST EN 4702-03:2018

Overview

EN 4702-03:2017 - Aerospace series: Quick release fastening systems - Part 03: Stud (quick‑release and locking) is a European Standard published by CEN for studs used in aircraft fuselage interior equipment and other non‑structural or secondary structural areas. The standard defines the dimensions, mass, tolerances and static (mechanical) values for quick‑release and locking studs intended for lining and interior applications.

Key topics and requirements

• Scope and purpose: Standardizes stud configuration for quick‑release fastening systems used in fuselage interiors and non‑structural applications.
• Dimensional data: Detailed figures and tables (Types E, F and G) specify head and shaft diameters, lengths, clamping ranges and mass for a range of length codes. Unspecified tolerances default to ISO 2768‑mK (EN 22768).
• Materials: Primary polymer material specified is PA66‑GF30 (see Annex A) with defined properties such as density (≈1.41 g/cm³), melting point (~260 °C) and mechanical moduli (e.g., tensile modulus dry/conditioned 10 000/7 200 MPa).
• Mechanical characteristics: Ultimate tensile loads are given (Table 1) and studs are qualified for use within the documented temperature limits (upper limit shown as 85 °C in the extract).
• Function and compatibility: Clamping ranges are listed for use in combination with spring clamp types from EN 4702‑04 (Type 01 and Type 02).
• Marking and identification: Product marking required per EN 2424 (Style F); colour codes (RAL 9010 clean white, RAL 9005 deep black) are specified.
• Quality & qualification:
  • Manufacturer must maintain an approved aerospace production quality system (e.g., EN 9100).
  • Product qualification process references EN 4710‑01 and EN 9133.
• Tests and inspection: Acceptance and qualification tests include materials, dimensions, surface defects, ultimate tensile loads, burning behaviour, functionality and endurance (1 500 cycles) as listed in Table 7.

Applications

• Fastening studs for aircraft interior panels, linings, trim, service panels and non‑structural assemblies where quick removal and locking are required.
• Typical users: aerospace OEMs, interior equipment suppliers, fastener manufacturers, maintenance & repair organizations (MRO), procurement and quality engineers specifying standardized interior fastening hardware.

Who should use this standard

• Design engineers specifying interior quick‑release fasteners.
• Component manufacturers and suppliers producing studs to aerospace requirements.
• Quality, certification and procurement teams validating part conformity and supplier capability.
• Certification Authorities and test laboratories performing product qualification.

Related standards

• EN 4702‑04 (spring clamp for use with the studs)
• EN 4710‑01 (technical specification for quick release fastening systems)
• EN 2424 (marking of aerospace products)
• EN 9100 / EN 9133 (quality and qualification processes)

Keywords: EN 4702‑03:2017, quick release fastening systems, stud quick‑release and locking, aerospace studs, fuselage interior, PA66‑GF30, clamping range, endurance test, EN 4702.