Thin Hex Nuts, Unchamfered manufactured to ISO 4036 are dimensioned by the size table reproduced on this page. The standard fixes geometry and tolerances only; material and property class are assigned by separate documents, and surface finish by separate finish standards.
ISO 4036 — Scope
ISO 4036 is "Hexagon thin nuts — Product grade B (unchamfered)".
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 4036 is written to product grade B; a different grade of the same part is a different document in the family, not a variant of this one.
Dimensions Specified by ISO 4036
| Size | Pitch P (mm) | Width across corners e (mm) | Nut height m (mm) | Width across flats s (mm) | Reference standard |
|---|---|---|---|---|---|
| M1.6 | 0.35 | 3.4 | 1.0 | 3.2 | ISO 4036 |
| M2 | 0.4 | 4.4 | 1.2 | 4.0 | ISO 4036 |
| M2.5 | 0.45 | 5.5 | 1.6 | 5.0 | ISO 4036 |
| M3 | 0.5 | 6.1 | 1.8 | 5.5 | ISO 4036 |
| (M3.5) | 0.6 | 6.6 | 2.0 | 6.0 | ISO 4036 |
| M4 | 0.7 | 7.7 | 2.2 | 7.0 | ISO 4036 |
| M5 | 0.8 | 8.9 | 2.7 | 8.0 | ISO 4036 |
| M6 | 1.0 | 10.9 | 3.2 | 10.0 | ISO 4036 |
| M8 | 1.25 | 14.5 | 4.0 | 13.0 | ISO 4036 |
| M10 | 1.5 | 17.9 | 5.0 | 16.0 | ISO 4036 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Thin Hex Nuts, Unchamfered page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
Companion Standards
ISO 4036 controls only the geometry of thin hex nuts, unchamfered. The mechanical strength is set by ISO 898-1 (bolts, screws and studs) or ISO 898-2 (nuts); the surface finish is governed by separate finish standards such as ISO 4042 for electroplating. For corrosion testing, the relevant document is ISO 9227 (neutral salt spray).
Custom manufacturing · Made to drawing
Need a nut to this standard in a non-standard size?
Parts built to ISO 4036 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 tapping.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
