For slotted spring pins, heavy duty, DIN 1481 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.
DIN 1481 — Scope
DIN 1481 is "Spring-type straight pins, slotted, heavy duty".
Tolerance & Product Grades
DIN 1481 does not divide slotted spring pins, heavy duty 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 DIN 1481
| Size | Nominal diameter d (mm) | Diameter before insertion min (mm) | Diameter before insertion max (mm) | Wall thickness s (mm) | Recommended hole H12 (mm) | Double shear load (kN) | Length l (mm) | Reference standard |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1.2 | 1.3 | 0.2 | 1 | 0.70 | 4~20 | ISO 8752 / DIN 1481 |
| 1.5 | 1.5 | 1.7 | 1.8 | 0.3 | 1.5 | 1.58 | 4~20 | ISO 8752 / DIN 1481 |
| 2 | 2 | 2.3 | 2.4 | 0.4 | 2 | 2.82 | 5~20 | ISO 8752 / DIN 1481 |
| 2.5 | 2.5 | 2.8 | 2.9 | 0.5 | 2.5 | 4.38 | 5~20 | ISO 8752 / DIN 1481 |
| 3 | 3 | 3.3 | 3.5 | 0.6 | 3 | 6.32 | 6~20 | ISO 8752 / DIN 1481 |
| 3.5 | 3.5 | 3.8 | 4.0 | 0.75 | 3.5 | 9.06 | 8~24 | ISO 8752 / DIN 1481 |
| 4 | 4 | 4.4 | 4.6 | 0.8 | 4 | 11.24 | 8~24 | ISO 8752 / DIN 1481 |
| 5 | 5 | 5.4 | 5.6 | 1.0 | 5 | 17.54 | 10~30 | ISO 8752 / DIN 1481 |
| 6 | 6 | 6.4 | 6.7 | 1.25 | 6 | 26.04 | 12~36 | ISO 8752 / DIN 1481 |
| 8 | 8 | 8.5 | 8.8 | 1.5 | 8 | 42.76 | 20~60 | ISO 8752 / DIN 1481 |
| 10 | 10 | 10.5 | 10.8 | 2.0 | 10 | 70.16 | 20~90 | ISO 8752 / DIN 1481 |
| 12 | 12 | 12.5 | 12.8 | 2.5 | 12 | 104.1 | 20~160 | ISO 8752 / DIN 1481 |
| 13 | 13 | 13.5 | 13.8 | 2.5 | 13 | 115.1 | 20~180 | ISO 8752 / DIN 1481 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Slotted Spring Pins, Heavy Duty page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify DIN 1481
DIN 1481 is still widely used in European mechanical engineering and as a cross-reference on legacy drawings; its ISO equivalent is preferred for new designs.
Custom manufacturing · Made to drawing
Need a pin to this standard in a non-standard size?
Parts built to DIN 1481 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 turning.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
