DIN 6798 is the standard cited for serrated lock washers. 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 6798 — Scope
DIN 6798 is "Serrated lock washers".
Tolerance & Product Grades
DIN 6798 does not divide serrated lock washers 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 6798
| For size | Inner diameter d1 (mm) | Outer diameter d2 (mm) | Thickness h (mm) | Type | Reference standard |
|---|---|---|---|---|---|
| M3 | 3.2 | 6.0 | 0.5 | Internal-tooth type A | DIN 6798 A/J |
| M4 | 4.3 | 7.6 | 0.5 | Internal-tooth type A | DIN 6798 A/J |
| M5 | 5.3 | 9.2 | 0.6 | Internal-tooth type A | DIN 6798 A/J |
| M6 | 6.4 | 11.0 | 0.7 | Internal-tooth type A | DIN 6798 A/J |
| M8 | 8.4 | 14.8 | 0.8 | Internal-tooth type A | DIN 6798 A/J |
| M10 | 10.5 | 18.0 | 0.9 | Internal-tooth type A | DIN 6798 A/J |
| M12 | 13.0 | 21.5 | 1.0 | Internal-tooth type A | DIN 6798 A/J |
| M16 | 17.0 | 27.0 | 1.2 | Internal-tooth type A | DIN 6798 A/J |
| M20 | 21.0 | 33.0 | 1.5 | Internal-tooth type A | DIN 6798 A/J |
| M3 | 3.2 | 7.0 | 0.5 | External-tooth type J | DIN 6798 A/J |
| M4 | 4.3 | 9.0 | 0.5 | External-tooth type J | DIN 6798 A/J |
| M5 | 5.3 | 10.0 | 0.6 | External-tooth type J | DIN 6798 A/J |
| M6 | 6.4 | 12.0 | 0.7 | External-tooth type J | DIN 6798 A/J |
| M8 | 8.4 | 15.0 | 0.8 | External-tooth type J | DIN 6798 A/J |
| M10 | 10.5 | 19.0 | 0.9 | External-tooth type J | DIN 6798 A/J |
| M12 | 13.0 | 22.0 | 1.0 | External-tooth type J | DIN 6798 A/J |
| M16 | 17.0 | 28.0 | 1.2 | External-tooth type J | DIN 6798 A/J |
| M20 | 21.0 | 34.0 | 1.5 | External-tooth type J | DIN 6798 A/J |
Companion Standards
DIN 6798 controls the geometry of serrated lock washers. Surface finish is governed by separate finish standards such as ISO 4042 for electroplating, and corrosion testing by ISO 9227 (neutral salt spray). Mechanical performance is set by the documents specific to this part family — ISO 898-1 and ISO 898-2 apply to bolts, screws, studs and nuts, and not here.
When to Specify DIN 6798
DIN 6798 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 washer to this standard in a non-standard size?
Parts built to DIN 6798 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 stamping or punching.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
