Manufacturers| Yale

Yale 50 Series Door Closer

• ANSI A156.4, Grade 1
• 10-year warranty
• Non-handed
• Rack-and-pinion design
• Cast aluminum body
• 1-3/8" (35mm) diameter piston
• 5/8" (16mm) diameter pinion journals
• Standard, separate and independent, latch, sweep
  and backcheck intensity valves
• 2-7/8" (73mm) projection
• Tri-Packed- packed for regular arm, top jamb and
  parallel arm installations.
• All standard arm applications allow

Older models may be stamped with Scoville or Eaton, which are the companies that used to own Norton
We some times find 20-0054-4001 or 20-0254-4001 stamped on the back of the closer