For taper pins, DIN 1 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 1 — Scope
DIN 1 specifies the dimensional requirements for taper pins. Material, surface condition and any performance rating are set by separate documents specific to this part family — ISO 898-1 and ISO 898-2, which govern bolt and nut property classes, do not apply here.
Tolerance & Product Grades
Tolerances for taper pins are given as limits on the individual dimensions in the table rather than as a fastener product grade. Where a general-tolerance class is cited on the drawing instead, it applies to the dimensions not otherwise toleranced.
Dimensions Specified by DIN 1
| Small-end diameter (mm) | Taper | Common length range (mm) | Material | Reference standard | Notes |
|---|---|---|---|---|---|
| 0.6 | 1:50 | 4~16 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 0.8 | 1:50 | 5~20 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 1.0 | 1:50 | 6~25 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 1.2 | 1:50 | 6~25 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 1.5 | 1:50 | 8~32 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 2.0 | 1:50 | 10~45 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 2.5 | 1:50 | 12~50 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 3.0 | 1:50 | 14~55 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 4.0 | 1:50 | 16~70 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 5.0 | 1:50 | 18~90 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 6.0 | 1:50 | 22~110 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 8.0 | 1:50 | 28~140 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 10.0 | 1:50 | 35~180 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 12.0 | 1:50 | 45~200 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 16.0 | 1:50 | 55~200 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 20.0 | 1:50 | 65~200 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 25.0 | 1:50 | 80~200 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 30.0 | 1:50 | 100~200 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 40.0 | 1:50 | 120~200 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
| 50.0 | 1:50 | 160~200 | Carbon steel / stainless | ISO 2339 / DIN 1 (type A) | Large end = small end + length/50 |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Taper Pins page. Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
When to Specify DIN 1
DIN 1 is still widely used in European mechanical engineering and as a cross-reference on legacy drawings; its ISO equivalent is preferred for new designs.
