Overview
EN ISO 13672:2025 - Fasteners: Parallel grooved pins with half-length diamond grooves specifies the characteristics of parallel grooved pins (closed ends) manufactured in steel and stainless steel, for nominal diameters 1 mm to 25 mm. These grooved pins are designed primarily for positioning/guiding and enabling relative rotation of assembled parts, offering higher insertion force and high pull-out resistance through elastic-fit behaviour. General functional principles and assembly requirements are covered by ISO 13669.
Key topics and technical requirements
- Geometry and dimensions: drawings, nominal diameters (1–25 mm), standard lengths, groove length equal to half the pin length (l/2) with defined tolerances per length ranges.
- Groove characteristics: half‑length diamond grooves (closed at the ends); groove start must not enter rounded or chamfered ends and is limited by l_max depending on pin length; groove angular relationships (e.g., 120° between grooves ±20°; 70° groove angle as reference).
- Ends and finishing: pins normally supplied with rounded ends; chamfered ends (CH) only by specific request.
- Material and surface treatments: steel (St) and stainless-steel grades (A1, A2, A4, C1, F1 or others per ISO 3506-6) with options for electroplated or non‑electrolytically applied zinc flake coatings (ISO 4042, ISO 10683), phosphate conversion or passivation (ISO 9717).
- Quality and inspection: acceptance inspection in accordance with ISO 3269; expanded diameter and straightness controlled per ISO 13669; workmanship requirements (free from burrs/defects).
- Labelling and designation: packaging must show reference to ISO 13672, nominal d and l, material symbol, finish/coating, manufacturer ID, lot number (ISO 1891‑4) and options (e.g., CH).
Practical applications
- Use where secure positioning, guiding or rotational alignment is required together with high pull-out resistance: mechanical assemblies, jigs and fixtures, power transmission interfaces, and general engineering components.
- Preferred where a more significant insertion force and elastic-fit retention are desirable compared with smooth pins.
Who should use this standard
- Fastener manufacturers and designers specifying grooved pins.
- Mechanical and product design engineers requiring reliable locating/rotation elements.
- Quality, procurement and inspection teams responsible for acceptance testing and supplier conformity.
- Standards bodies and regulatory/contract specialists referencing harmonized European and ISO requirements.
Related standards
Keywords: EN ISO 13672:2025, parallel grooved pins, half-length diamond grooves, fasteners, grooved pins, steel, stainless steel, pin dimensions, pull-out resistance.
