For slotted oval countersunk head machine screws, ISO 2010 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.
ISO 2010 — Scope
ISO 2010 is "Slotted raised countersunk head screws (common head style) — Product grade A".
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
ISO 2010 is written to product grade A; a different grade of the same part is a different document in the family, not a variant of this one.
Dimensions Specified by ISO 2010
| Size | Pitch P (mm) | a (mm) | b (mm) | Head diameter dk (mm) | csh_diam (mm) | csh_height (mm) | n_min (mm) | r (mm) | t_mean (mm) | x (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M1.6 | 0.35 | 0.7 | 25 | 3.6 | 2.8 | 1.0 | 0.46 | 0.2 | 0.4 | 0.9 | 2.5~16 | ISO 2010 |
| M2 | 0.4 | 0.8 | 25 | 4.4 | 3.6 | 1.2 | 0.56 | 0.3 | 0.5 | 1.0 | 3~20 | ISO 2010 |
| M2.5 | 0.45 | 0.9 | 25 | 5.5 | 4.5 | 1.5 | 0.66 | 0.3 | 0.6 | 1.1 | 4~25 | ISO 2010 |
| M3 | 0.5 | 1.0 | 25 | 6.3 | 5.3 | 1.65 | 0.86 | 0.4 | 0.7 | 1.25 | 5~30 | ISO 2010 |
| (M3.5) | 0.6 | 1.2 | 38 | 8.2 | 7.1 | 2.35 | 1.06 | 0.4 | 1.0 | 1.5 | 6~35 | ISO 2010 |
| M4 | 0.7 | 1.4 | 38 | 9.4 | 8.2 | 2.7 | 1.26 | 0.5 | 1.1 | 1.75 | 6~40 | ISO 2010 |
| M5 | 0.8 | 1.6 | 38 | 10.4 | 9.2 | 2.7 | 1.26 | 0.6 | 1.2 | 2.0 | 8~50 | ISO 2010 |
| M6 | 1.0 | 2.0 | 38 | 12.6 | 11.2 | 3.3 | 1.66 | 0.7 | 1.4 | 2.5 | 8~60 | ISO 2010 |
| M8 | 1.25 | 2.5 | 38 | 17.3 | 15.6 | 4.65 | 2.06 | 1.0 | 2.0 | 3.2 | 10~80 | ISO 2010 |
| M10 | 1.5 | 3.0 | 38 | 20.0 | 18.1 | 5.0 | 2.56 | 1.2 | 2.3 | 3.8 | 12~80 | ISO 2010 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Slotted Oval Countersunk Head Machine Screws page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify ISO 2010
Choose ISO 2010 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for slotted oval countersunk head machine screws.
Custom manufacturing · Made to drawing
Need a screw to this standard in a non-standard size?
Parts built to ISO 2010 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.
