Specification summary of DIN 5254 as applied to circlip pliers (internal and external): the dimensions the standard fixes, the full size range supplied, and the related designations commonly cross-referenced.
DIN 5254 — Scope
DIN 5254 specifies the dimensional requirements for circlip pliers (internal and external).
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 circlip pliers (internal and external) 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 5254
| Plier type | Ring it fits | Action | Tip forms available |
|---|---|---|---|
| external (DIN 5254 A) | shaft rings, DIN 471 | squeezing the handles opens the ring | straight, 45 degrees, 90 degrees |
| internal (DIN 5254 B) | bore rings, DIN 472 | squeezing the handles closes the ring | straight, 45 degrees, 90 degrees |
| convertible | both | reversible mechanism | straight |
| tip 0.9 mm | rings for shaft/bore 3 u2013 10 mm | n/a | n/a |
| tip 1.3 mm | rings for shaft/bore 10 u2013 25 mm | n/a | n/a |
| tip 1.8 mm | rings for shaft/bore 19 u2013 60 mm | n/a | n/a |
| tip 2.3 mm | rings for shaft/bore 40 u2013 100 mm | n/a | n/a |
Equivalent Standards
Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Circlip Pliers (Internal and External) page.
Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.
Companion Standards
DIN 5254 controls only the geometry of circlip pliers (internal and external). Surface finish is governed by separate finish standards (for example ISO 4042 for electroplating), and corrosion testing by ISO 9227 (neutral salt spray). Mechanical performance is set by the standards specific to this part family, not by ISO 898-1 or ISO 898-2, which apply to bolts, screws and nuts.
