For wing screws (din 316 form), DIN 316 is the governing document for the dimensions listed below. Mechanical and performance requirements for this part family are set by its own standards, not by the bolt and screw property-class documents.
DIN 316 — Scope
DIN 316 specifies the dimensional requirements for wing screws (din 316 form).
Material, surface condition and any performance rating are set by separate documents specific to this part family — ISO 898-1 and ISO 898-2, which govern bolt and nut property classes, do not apply here.
Tolerance & Product Grades
Tolerances for wing screws (din 316 form) are given as limits on the individual dimensions in the table rather than as a fastener product grade.
Where a general-tolerance class is cited on the drawing instead, it applies to the dimensions not otherwise toleranced.
Dimensions Specified by DIN 316
| Thread size | Pitch (mm) | Wing span A (mm) | Wing height (mm) | Boss diameter (mm) | Common length range (mm) | Material | Reference standard |
|---|---|---|---|---|---|---|---|
| M4 | 0.7 | 22 | 10 | 9 | 8~30 | Steel zinc / A2 | DIN 316 |
| M5 | 0.8 | 27 | 12 | 11 | 10~40 | Steel zinc / A2 | DIN 316 |
| M6 | 1.0 | 32 | 14 | 13 | 10~50 | Steel zinc / A2 | DIN 316 |
| M8 | 1.25 | 40 | 17 | 17 | 12~60 | Steel zinc / A2 | DIN 316 |
| M10 | 1.5 | 48 | 21 | 20 | 16~60 | Steel zinc | DIN 316 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Wing Screws (DIN 316 Form) page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify DIN 316
DIN 316 is still widely used in European mechanical engineering and as a cross-reference on legacy drawings; its ISO equivalent is preferred for new designs.
