ETW E-Ring / Circlips
Model: ETW / Made In: Taiwan
ETW E-ring is a fastener that retains components or assemblies onto a shaft or in a housing/bore when placed in a groove. Once placed, the exposed portion acts as a shoulder which retains the specific component or assembly.

Source: Wikipedia
  Introduction   spec.   application  
A circlip (a portmanteau of "circle" and "clip"), also known as a Seeger-ring, C-clip, Rotor Clip, snap ring or Jesus clip,[1] is a type of fastener or retaining ring consisting of a semi-flexible metal ring with open ends which can be snapped into place, into a machined groove on a dowel pin or other part to permit rotation but to prevent lateral movement. There are two basic types: internal and external, referring to whether they are fitted into a bore or over a shaft. Circlips are often used to secure pinned connections.
Common examples include e-clips (e-ring) and the (both internal and external) snap ring or circlip. These general types of fasteners are sized to provide an interference fit onto (or into, in the case of an internal fastener) a groove or land when in use, such that they must be elastically deformed in order to install or remove them. Source:Wikipedia

Keywords: E-clip , Rotor Clip, snap ring , Rotor Clip, snap ring , Circlips , Retainers, Circlips for shafts , sicherungsscheiben