For round split dies and die stocks, EN 22568 is the governing document for the dimensions listed below. Mechanical and performance requirements for this part family are set by its own standards, not by the bolt and screw property-class documents.
EN 22568 — Scope
The table below lists the dimensions catalogued for round split dies and die stocks under EN 22568. The scope of EN 22568 itself is not summarised here — where a figure matters, confirm it against the published document.
Tolerance & Product Grades
Product grade is a concept from dimensional fastener standards and does not apply to EN 22568. Tolerances for this part are the limits shown against each dimension in the table.
Dimensions Specified by EN 22568
| Die outside diameter | Thread range typically held | Adjustment | Held in |
|---|---|---|---|
| 16 mm | M1 – M2.5 | split, three-screw adjustment | 16 mm die stock |
| 20 mm | M3 – M5 | split, three-screw adjustment | 20 mm die stock |
| 25 mm | M6 – M8 | split, three-screw adjustment | 25 mm die stock |
| 30 mm | M9 – M12 | split, three-screw adjustment | 30 mm die stock |
| 38 mm | M14 – M20 | split, three-screw adjustment | 38 mm die stock |
| 45 mm | M22 – M24 | split, three-screw adjustment | 45 mm die stock |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Round Split Dies and Die Stocks page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify EN 22568
Choose EN 22568 for international engineering work and OEM supply where ISO standards are the contractual reference. It is the default modern specification for round split dies and die stocks.
Custom manufacturing · Made to drawing
Need a fastener tool to this standard in a non-standard size?
Parts built to EN 22568 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.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
