The standard material for spiral-wound retaining rings is carbon spring steel. Some rings are available in other materials such as 302, 316, and 17-7 PH/C stainless steel, NS A286 alloy, beryllium ...

They opt to go with older, thicker spiral wound or camprofile gaskets, rather than switching to slimmer Selco gasket technology from Sealing Corp. which are more pliable, longer lasting, stable ...

In contrast, substituting a spiral-wound multiple-turn wave spring allows 360° contact with entire periphery of groove, with no gaps — and because there are no lugs, there is a radial space ...