NSN 4820-00-032-5123

Disk Diaphragm

About this product

0.525 in. Lg guide stem under cone seat angle.

Manufacturer part number FV20-788-3 for national stock number 4820000325123.


  • Product description

    Valve Disk NSN 4820-00-032-5123.

  • MPN or Model


  • Schedule B
    8481.90.9090 (Parts of taps, cocks, valves and similar appliances, nesoi)
  • NMF (National Motor Freight)
    051080 - Faucets, Bibcocks, Gates Valves
  • Shank Diameter
    0.233 inches
  • Flange Diameter
    0.308 inches
  • Overall Height
    0.835 inches
  • Flange Seat To Disk End Height
    0.085 inches
  • Under Flange Height
    0.715 inches
  • Seat Angle
    30.0 degrees
  • Material
    Stainless steel
  • Style Designator
    Cone check
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Valve Disk

An item of various shapes (usually circular, conical, cylindrical, or rectangular) used to prevent or regulate the flow of liquids or gases through the valve. May include a retainer, screw, holder, and the like.

Mechanic Bill explains Disk Diaphragm

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NSN 4820000325123

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
FV20-788-3 Automatic Switch Company
GV38-585PC19 Automatic Switch Company
AV37-663PC19 Automatic Switch Company
AV37-760PC19 Automatic Switch Company
AV57-722PC22 Automatic Switch Company
FV20-788REVAITEM3 Automatic Switch Company
AV37-096PC27 Automatic Switch Company
GV37-156REVAPC27 Automatic Switch Company
GV38-576REVAPC19 Automatic Switch Company
571-4903-1486553REVAPC27 Naval Ship Systems Command
571-4903-1486557REVAPC19 Naval Ship Systems Command
571-4903-1486558REVAPC19 Naval Ship Systems Command
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