Clamping Handle Screw (Long) manufactured to GN 313 are dimensioned by the size table reproduced on this page. The standard fixes geometry and tolerances only; material and property class are assigned by ISO 898-1/898-2, and surface finish by separate finish standards.
GN 313 — Scope
GN 313 specifies the dimensions and tolerances of clamping handle screw (long) — din 6336 / gn 313 (series 044). 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
GN 313, alongside the related DIN 6336 / GN 313 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 GN 313
| Thread size | Pitch (mm) | Length L (mm) | Handle length (mm) | Knob diameter (mm) | Reference standard |
|---|---|---|---|---|---|
| M5 | 0.8 | 20 | 45 | 28 | DIN 6336 / GN 313 |
| M6 | 1.0 | 25 | 50 | 32 | DIN 6336 / GN 313 |
| M8 | 1.25 | 30 | 60 | 40 | DIN 6336 / GN 313 |
| M10 | 1.5 | 40 | 70 | 45 | DIN 6336 / GN 313 |
| M12 | 1.75 | 50 | 80 | 50 | DIN 6336 / GN 313 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Clamping Handle Screw (Long) — DIN 6336 / GN 313 (Series 044) page. Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify GN 313
Choose GN 313 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for clamping handle screw (long) — din 6336 / gn 313 (series 044).