Sink Drain Plug and Expanding Seal

Sink drain plug & expanding seal c/w screw. Typically used to seal the fresh water reservoir drain holes of sinks in (many) portable toilets. Push the seal into the sink drain point, tighten the screw and the seal will expand to fill the hole. The larger flange (shoulder) on the seal's front edge completes the seal.  Fits 18mm (3/4") diameter holes in sink pedestals and with a wall thickness of 4-10mm.

Two part assembly

1. a rubber "Ankernut" 
   - expanding seal c/w threaded insert 
2. an 8mm screw with cross-head

• Overall seal length = 25mm.
• Seal body diameter = 16mm
• Flange diameter = 22mm.
• Flange thickness = 5.7mm.