These provide a flat metal surface for equal distribution of bolt load during Expansion Joint installation.
Caliper Repair Kit, Metal Retaining Rings. Stock Image - Image of
Metal Retaining Rings
Retaining rings hi-res stock photography and images - Alamy
Guidelines for Stainless Steel Piston Use
Fastenerdata - CIRCLIPS RETAINING RINGS - Fastener Specifications
Metal Retaining Rings
Guidelines for Stainless Steel Piston Use
Metal Retaining Rings
Heavy-Duty Cage Frame with Metal Retaining Rings and Plastic
Retaining Rings!? What the heck are those?
Retaining Ring - an overview
Retaining Rings