For Wing Nuts, DIN 315 defines dimensions, tolerances and product grades. The sections below describe its scope, what it does NOT cover, and the equivalents across DIN, ISO and ASME.
DIN 315 — Scope
DIN 315 specifies the dimensions and tolerances of wing nuts. 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 315, alongside the related DIN 315 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 315
| Size | Pitch (mm) | Wing span (mm) | Wing height (mm) | Body height (mm) | Reference standard | Notes |
|---|---|---|---|---|---|---|
| M4 | 0.7 | 28 | 17 | 9 | DIN 315 | Hand-tightened wing nut |
| M5 | 0.8 | 32 | 19 | 10 | DIN 315 | Hand-tightened wing nut |
| M6 | 1.0 | 37 | 22 | 12 | DIN 315 | Hand-tightened wing nut |
| M8 | 1.25 | 45 | 27 | 15 | DIN 315 | Hand-tightened wing nut |
| M10 | 1.5 | 55 | 33 | 18 | DIN 315 | Hand-tightened wing nut |
| M12 | 1.75 | 64 | 38 | 22 | DIN 315 | Hand-tightened wing nut |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Wing Nuts page. Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify DIN 315
DIN 315 is still widely used in European mechanical engineering and as a cross-reference on legacy drawings; its ISO equivalent is preferred for new designs.