Specification summary of ISO 14584 as applied to hexalobular socket oval countersunk head screws: the dimensions the standard controls, the full specified size range, and the equivalent DIN/ISO/ASME designations.
ISO 14584 — Scope
ISO 14584 is "Hexalobular socket raised countersunk head screws".
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 14584 does not divide hexalobular socket oval countersunk head 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 ISO 14584
| Size | Pitch P (mm) | b (mm) | Head diameter dk (mm) | csh_diam (mm) | f (mm) | csh_height (mm) | r (mm) | rf (mm) | x (mm) | tt (mm) | A (mm) | t_mean (mm) | Length range l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M2 | 0.4 | 25.0 | 4.4 | 3.8 | 0.5 | 1.2 | 0.2 | 4.0 | 1.0 | T6 | 1.75 | 0.7 | 3~20 | ISO 14584 |
| M2.5 | 0.45 | 25.0 | 5.5 | 4.7 | 0.6 | 1.5 | 0.3 | 5.0 | 1.1 | T8 | 2.4 | 1.0 | 3~25 | ISO 14584 |
| M3 | 0.5 | 25.0 | 6.3 | 5.5 | 0.7 | 1.65 | 0.4 | 6.0 | 1.25 | T10 | 2.8 | 1.2 | 4~30 | ISO 14584 |
| (M3.5) | 0.6 | 38.0 | 8.2 | 7.3 | 0.8 | 2.35 | 0.4 | 8.5 | 1.5 | T15 | 3.35 | 1.3 | 5~35 | ISO 14584 |
| M4 | 0.7 | 38.0 | 9.4 | 8.4 | 1.0 | 2.7 | 0.5 | 9.5 | 1.75 | T20 | 3.95 | 1.5 | 5~40 | ISO 14584 |
| M5 | 0.8 | 38.0 | 10.4 | 9.3 | 1.2 | 2.7 | 0.6 | 9.5 | 2.0 | T25 | 4.5 | 1.7 | 6~50 | ISO 14584 |
| M6 | 1.0 | 38.0 | 12.6 | 11.3 | 1.4 | 3.3 | 0.7 | 12.0 | 2.5 | T30 | 5.6 | 2.2 | 8~60 | ISO 14584 |
| M8 | 1.25 | 38.0 | 17.3 | 15.8 | 2.0 | 4.65 | 1.0 | 16.5 | 3.2 | T45 | 7.95 | 3.0 | 10~60 | ISO 14584 |
| M10 | 1.5 | 38.0 | 20.0 | 18.3 | 2.3 | 5.0 | 1.2 | 19.5 | 3.8 | T50 | 8.95 | 3.8 | 12~60 | ISO 14584 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Hexalobular Socket Oval Countersunk Head Screws page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
Companion Standards
ISO 14584 controls only the geometry of hexalobular socket oval countersunk head screws. 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 screw to this standard in a non-standard size?
Parts built to ISO 14584 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.
