Light-duty AN (Army Navy)-style wiper rod seals have a low profile, making them a good choice for applications where radial and axial space are limited. AN-style hydraulic cylinder wiper seals (sometimes called 940 seals) fit MS 33675 grooves. They do not have a metal component, so they snap into place and don't require special tools to install.
Medium-duty DT-style wiper rod seals are used on large diameter hydraulic-cylinder rods and in demanding environments. The snap-in design doesn't require special tools for installation.
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