Overview
ISO 15974:2000 is an International Standard for closed-end blind rivets with a break-pull mandrel and specified head form, covering aluminium-alloy bodies (AlA) with steel mandrels (St). The document specifies dimensional limits, mechanical properties and application guidance for nominal diameters from 3.2 mm to 4.8 mm, and provides acceptance and workmanship requirements to support reliable fastening.
Key Topics
- Material and finish: rivet body of aluminium alloy (AlA) and mandrel of steel (St); natural surface finish with storage protection.
- Nominal diameters covered: 3.2 mm, 4 mm and 4.8 mm.
- Clearance hole diameters (Table 2):
- 3.2 mm nominal: h1 min 3.3 mm, h1 max 3.4 mm
- 4.0 mm nominal: h1 min 4.1 mm, h1 max 4.2 mm
- 4.8 mm nominal: h1 min 4.9 mm, h1 max 5.0 mm
- Mechanical properties (minimum/maximum as specified in Table 3):
- 3.2 mm: shear min 1 100 N, tensile min 1 450 N, mandrel break max 3 500 N
- 4.0 mm: shear min 1 600 N, tensile min 2 200 N, mandrel break max 5 000 N
- 4.8 mm: shear min 2 200 N, tensile min 3 100 N, mandrel break max 7 000 N
- Workmanship: rivets must be free from burrs and harmful defects, with well-formed heads and shanks. After setting, rivets shall show no cracking at 5× magnification.
- Dimensions and grip ranges: detailed rivet and mandrel dimensions and recommended grip ranges are given in tables and figure(s). Minimum grip lengths are presented as recommendations; lower minimum values may be possible in certain cases.
Applications
ISO 15974:2000 is intended for designers, fastener suppliers and assembly engineers specifying closed-end blind rivets for applications that require:
- Permanent blind-side fastening where access is only available from one side
- Lightweight assemblies using aluminium alloy rivet bodies with steel mandrels
- Defined mechanical performance (shear and tensile loads) and repeatable assembly quality
Practical value: using rivets conforming to ISO 15974 reduces variability in joint performance, ensures compatibility with recommended clearance holes, and simplifies acceptance testing and procurement.
Related Standards
- ISO 3269:2000 - Fasteners - Acceptance inspection (applies to acceptance testing unless otherwise agreed)
- ISO 14588:2000 - Blind rivets - Terminology and definitions
- ISO 14589:2000 - Blind rivets - Mechanical testing
Designation example: Blind rivet ISO 15974 - 4 × 12.5 - AlA/St
For implementation, refer to the normative tables and figures in ISO 15974:2000 for exact dimensional tolerances, grip range guidance and test limits. Annex A supplies design formulae for head and shank dimensions (informative).