For fine adjustment set screws, DIN 913 fixes the geometry and the tolerances. 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 913 — Scope
DIN 913 is "Hexagon socket set screws with flat point". Its ISO counterpart is ISO 4026.
Material, property class, surface finish and packaging are governed by separate documents — ISO 898-1 and ISO 898-2 for mechanical property classes, ISO 4042 for electroplated finishes.
Tolerance & Product Grades
DIN 913 does not divide fine adjustment set screws into product grades. Tolerances are given as limits on the individual dimensions in the table.
Where a general-tolerance class is cited on the drawing instead, it applies to the dimensions not otherwise toleranced.
Dimensions Specified by DIN 913
| Thread size | Pitch (mm) | Hex socket s (mm) | Travel per turn (mm) | Travel per 1/12 turn (mm) | Common length range (mm) | Reference standard |
|---|---|---|---|---|---|---|
| M4x0.5 | 0.5 | 2 | 0.50 | 0.042 | 4~20 | DIN 913 fine |
| M5x0.5 | 0.5 | 2.5 | 0.50 | 0.042 | 5~25 | DIN 913 fine |
| M6x0.75 | 0.75 | 3 | 0.75 | 0.063 | 6~30 | DIN 913 fine |
| M8x1 | 1.0 | 4 | 1.00 | 0.083 | 8~40 | DIN 913 fine |
| M10x1 | 1.0 | 5 | 1.00 | 0.083 | 10~50 | DIN 913 fine |
| M12x1.25 | 1.25 | 6 | 1.25 | 0.104 | 12~60 | DIN 913 fine |
| M16x1.5 | 1.5 | 8 | 1.50 | 0.125 | 16~60 | DIN 913 fine |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Fine Adjustment Set Screws page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify DIN 913
DIN 913 is still widely used in European mechanical engineering and as a cross-reference on legacy drawings; its ISO equivalent is preferred for new designs.
Custom manufacturing · Made to drawing
Need a screw to this standard in a non-standard size?
Parts built to DIN 913 are already in the catalog, so a special is usually a variation on existing tooling rather than a new design — which is what keeps the cost down. Made by cold heading or warm forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
