SIST EN ISO 13669:2025 PDF

Overview

EN ISO 13669:2025 - Fasteners: Grooved pins - General requirements is the harmonized European adoption of ISO 13669:2025. It specifies the general characteristics of grooved pins made from steel and stainless steel with nominal diameters from 1 mm to 25 mm. The standard defines geometry, groove types, end forms, functional principles and requirements needed to achieve reliable elastic-fit locking for applications such as locking, positioning, guiding and permitting controlled relative rotation.

Key topics and requirements

• Scope and purpose: General requirements for grooved pins (steel and stainless steel) designed to provide an interference, elastic fit through longitudinal grooves.
• Shapes and ends: Defines pin end styles (rounded, chamfered, pilot point variants) and groove end types (open, closed).
• Groove shapes and symbols: Standardized groove geometries with symbols for identification:
  • Diamond (D) - uniform expanded diameter
  • Oval (O) - symmetrical, progressive expanded diameter
  • Progressive (P) - non‑symmetrical progressive expanded diameter (can be tapered or reverse‑taper)
• Pin types: Parallel grooved, taper grooved, and reverse‑taper grooved pins - each producing a particular expanded diameter profile for specific assembly behaviour.
• Principles for assembly: Explains how the three equidistant (120°) grooves produce an expanded diameter that compresses when inserted into a mating hole to produce elastic locking.
• Dimensions and tolerances: Requirements for nominal diameters, expanded diameter control methods and pin straightness; these ensure interchangeability and reliable fit.
• Mechanical and physical properties: Includes provisions and references for shear resistance, hardness testing and material considerations for non‑standard materials.
• Inspection, marking and delivery: Manufacturer, supplier and purchaser inspection procedures, delivery of test results, and labelling/marking requirements.

Practical applications and who uses it

• Typical uses: locking parts, positioning and guiding components, and enabling controlled relative rotation in assemblies where interference fit and easy installation are required.
• Users:
  • Fastener and component manufacturers (product design and quality control)
  • Mechanical and design engineers specifying or selecting pins for assemblies
  • Procurement and quality inspectors verifying conformity
  • Test laboratories performing hardness and shear tests
• Industries: Automotive, machinery, aerospace subcomponents, industrial equipment and consumer products where reliable pin retention is needed.

Related standards

EN ISO 13669:2025 references and aligns with related standards for testing and inspection:

• ISO 1891-4 - Fasteners vocabulary (control, inspection, delivery)
• ISO 6507-1 - Vickers hardness test
• ISO 8749 - Pins and grooved pins shear test
• ISO 16228 - Types of inspection documents

For engineers and purchasers specifying grooved pins, EN ISO 13669:2025 provides the required product definitions, acceptance tests and inspection criteria to ensure consistent performance and interchangeability.