For studs & threaded rods, DIN 975 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 975 — Scope
DIN 975 specifies the dimensions and tolerances of studs & threaded rods. 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 975, alongside the related DIN 939 / DIN 975 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 975
| Thread size | Pitch (mm) | Point type | Common lengths (mm) | Reference standard | Notes |
|---|---|---|---|---|---|
| M4 | 0.7 | M4 | 10~100 | DIN 939 | Stud, equal thread both ends |
| M5 | 0.8 | M5 | 10~120 | DIN 939 | Stud, equal thread both ends |
| M6 | 1.0 | M6 | 12~160 | DIN 939 | Stud, equal thread both ends |
| M8 | 1.25 | M8 | 16~200 | DIN 939 | Stud, equal thread both ends |
| M10 | 1.5 | M10 | 20~250 | DIN 939 | Stud, equal thread both ends |
| M12 | 1.75 | M12 | 25~300 | DIN 939 | Stud, equal thread both ends |
| M14 | 2.0 | M14 | 30~300 | DIN 939 | Stud, equal thread both ends |
| M16 | 2.0 | M16 | 35~300 | DIN 939 | Stud, equal thread both ends |
| M18 | 2.5 | M18 | 40~300 | DIN 939 | Stud, equal thread both ends |
| M20 | 2.5 | M20 | 45~300 | DIN 939 | Stud, equal thread both ends |
| M22 | 2.5 | M22 | 50~300 | DIN 939 | Stud, equal thread both ends |
| M24 | 3.0 | M24 | 50~300 | DIN 939 | Stud, equal thread both ends |
| M27 | 3.0 | M27 | 55~300 | DIN 939 | Stud, equal thread both ends |
| M30 | 3.5 | M30 | 60~300 | DIN 939 | Stud, equal thread both ends |
| M36 | 4.0 | M36 | 70~300 | DIN 939 | Stud, equal thread both ends |
| M42 | 4.5 | M42 | 80~300 | DIN 940 | Stud, equal thread both ends |
| M48 | 5.0 | M48 | 90~300 | DIN 940 | Stud, equal thread both ends |
| M4 | 0.7 | Fully threaded | 1000/2000/3000 | DIN 975 | Fully threaded rod, cut to length |
| M5 | 0.8 | Fully threaded | 1000/2000/3000 | DIN 975 | Fully threaded rod, cut to length |
| M6 | 1.0 | Fully threaded | 1000/2000/3000 | DIN 975 | Fully threaded rod, cut to length |
| M8 | 1.25 | Fully threaded | 1000/2000/3000 | DIN 975 | Fully threaded rod, cut to length |
| M10 | 1.5 | Fully threaded | 1000/2000/3000 | DIN 975 | Fully threaded rod, cut to length |
| M12 | 1.75 | Fully threaded | 1000/2000/3000 | DIN 975 | Fully threaded rod, cut to length |
| M16 | 2.0 | Fully threaded | 1000/2000/3000 | DIN 975 | Fully threaded rod, cut to length |
| M20 | 2.5 | Fully threaded | 1000/2000/3000 | DIN 975 | Fully threaded rod, cut to length |
| M24 | 3.0 | Fully threaded | 1000/2000/3000 | DIN 975 | Fully threaded rod, cut to length |
| M30 | 3.5 | Fully threaded | 1000/2000/3000 | DIN 975 | Fully threaded rod, cut to length |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Studs & Threaded Rods page. Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify DIN 975
DIN 975 is still widely used in European mechanical engineering and as a cross-reference on legacy drawings; its ISO equivalent is preferred for new designs.
