The P-S (Pin-Slot) attachment, as utilized for the Thompson dowel in removable partial dentures.
Pipko
D J
DJ
Spanko
J E
JE
D003772:Dental Pins; D003779:Denture Design; D003834:Denture Precision Attachment; D003832:Denture, Partial, Removable; D006801:Humans; D011176:Post and Core Technique