For blind (pop) rivets, DIN 7337 defines the dimensions, tolerances and product grades. The sections below describe the scope of the document, the properties it deliberately leaves to companion standards, and the equivalent designations across standards bodies.
DIN 7337 — Scope
DIN 7337 specifies the dimensions and tolerances of blind (pop) rivets. Material, property class, surface finish and packaging are governed by separate documents in the same standards family (for example ISO 898-1 for the mechanical property classes of bolts and screws).
Tolerance & Product Grades
DIN 7337, alongside the related ISO 15977 / DIN 7337 entries on this site, specifies product grades (typically A or B for fine work and C for general engineering) and tolerance classes for the controlling dimensions. Choose the grade against the precision your application requires.
Dimensions Specified by DIN 7337
| Nominal diameter (mm) | Grip range (mm) | Cap diameter dk (mm) | Free length (mm) | Body / mandrel material | Reference standard | Notes |
|---|---|---|---|---|---|---|
| 2.4 | 0.5~3.0 | 5.0 | 7.0 | Aluminum / aluminum | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 2.4 | 0.5~3.0 | 5.0 | 7.0 | Aluminum / steel | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 3.0 | 0.5~4.0 | 6.0 | 8.0 | Aluminum / aluminum | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 3.0 | 0.5~4.0 | 6.0 | 8.0 | Aluminum / steel | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 3.2 | 0.5~6.0 | 6.4 | 10.0 | Aluminum / aluminum | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 3.2 | 0.5~6.0 | 6.4 | 10.0 | Stainless / stainless | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 4.0 | 0.5~6.0 | 8.0 | 12.0 | Aluminum / aluminum | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 4.0 | 0.5~6.0 | 8.0 | 12.0 | Aluminum / steel | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 4.0 | 0.5~6.0 | 8.0 | 12.0 | Stainless / stainless | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 4.8 | 0.5~8.0 | 9.5 | 14.0 | Aluminum / aluminum | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 4.8 | 0.5~8.0 | 9.5 | 14.0 | Aluminum / steel | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 4.8 | 0.5~8.0 | 9.5 | 14.0 | Stainless / stainless | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 5.0 | 1.0~10.0 | 10.0 | 16.0 | Aluminum / aluminum | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 6.0 | 1.5~12.0 | 12.0 | 18.0 | Aluminum / aluminum | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
| 6.0 | 1.5~12.0 | 12.0 | 18.0 | Aluminum / steel | ISO 15977/15978 | Use drill of diameter +0.1 to 0.2 mm |
Companion Standards
DIN 7337 controls only the geometry of blind (pop) rivets. The mechanical strength is set by ISO 898-1 (bolts and screws) or ISO 898-2 (nuts); the surface finish is governed by separate finish standards (e.g. ISO 4042 for electroplating). For corrosion testing, the relevant document is ISO 9227 (neutral salt spray).
When to Specify DIN 7337
DIN 7337 is still widely used in European mechanical engineering and as a cross-reference on legacy drawings; its ISO equivalent is preferred for new designs.