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2. Retaining ring - Wikipedia

   en.wikipedia.org/wiki/Retaining_ring

   A retaining ring is a fastener that holds components or assemblies onto a shaft or in a housing/bore when installed - typically in a groove - for one time use only. Once installed, the exposed portion acts as a shoulder which retains the specific component or assembly.

3. List of DIN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_DIN_standards

   Retaining rings with lugs for use on shafts (external circlips) Active: ... Plates and Sheets of Aluminium and Wrought: ... Light-weight Type: Withdrawn: DIN EN ISO ...

4. C3A1 mine - Wikipedia

   en.wikipedia.org/wiki/C3A1_mine

   When the pressure plate has been pressed down approximately 2.5 cm, a single retaining ball bearing flips side-ways into a recess. When the ball bearing flips side-ways, it frees the striker (held under tension by a coiled spring beneath it) which snaps upwards into the stab detonator , thereby detonating the explosive charge.

5. End-face mechanical seal - Wikipedia

   en.wikipedia.org/wiki/End-face_mechanical_seal

   The seal ring and mating ring are in intimate contact, one ring rotates with the shaft and the other ring is stationary. Either ring may be rotating or stationary. Also, either ring may be made of hard or soft material. These two rings are machined using a process called lapping in order to obtain the necessary degree of surface finish and ...

6. Circlip - Wikipedia

   en.wikipedia.org/wiki/Circlip

   A circlip (a portmanteau of "circle" and "clip"), also known as a C-clip, snap ring, or Jesus clip, [1] is a type of fastener or retaining ring that consists of a semi-flexible metal ring with open ends that can be snapped into place into a machined groove on a dowel pin or other part to permit rotation but to prevent axial movement.

7. Caisson (engineering) - Wikipedia

   en.wikipedia.org/wiki/Caisson_(engineering)

   In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson 'box', from Italian cassone 'large box', an augmentative of cassa) is a watertight retaining structure. [1] It is used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ships. [3]