DIN 1143 is the standard cited for flat head nails for automatic nailers. This page sets out what the standard controls for this part, reproduces the dimensional table supplied against it, and notes the related designations referenced on drawings.
DIN 1143 — Scope
DIN 1143 is "Round plain head nails for use in automatic nailing machines".
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
DIN 1143 does not divide flat head nails for automatic nailers 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 1143
| Size | d_1 (mm) | d_2 (mm) | l (mm) | Reference standard |
|---|---|---|---|---|
| 18x35 | 1.8 | 4.5 | 35 | DIN 1143 |
| 20x40 | 2.0 | 5.0 | 40 | DIN 1143 |
| 20x45 | 2.0 | 5.0 | 45 | DIN 1143 |
| 22x50 | 2.2 | 5.5 | 50 | DIN 1143 |
| 25x55 | 2.5 | 6.3 | 55 | DIN 1143 |
| 25x60 | 2.5 | 6.3 | 60 | DIN 1143 |
| 28x65 | 2.8 | 7.0 | 65 | DIN 1143 |
| 31x70 | 3.1 | 7.0 | 70 | DIN 1143 |
| 31x80 | 3.1 | 7.0 | 80 | DIN 1143 |
| 34x90 | 3.4 | 8.0 | 90 | DIN 1143 |
Companion Standards
DIN 1143 controls only the geometry of flat head nails for automatic nailers. 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).
When to Specify DIN 1143
DIN 1143 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 nail to this standard in a non-standard size?
Parts built to DIN 1143 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.
