Lube LSP51-09


Sight Plug Gage, NPT 2-11 1/2 Inches

LSP51-09 39608
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ItemFused Sight
TypeHigh PSI Fused Liquid Level
Sight Dia. (In.)1-7/8
NPT2- 11-1/2
Max. Operating PSI500
Hex Dia. Flats (In.)2-1/2
Sight MaterialGlass
FunctionAllow Visual Inspection of Fluid Levels in Gear Boxes or Reservoirs
Weight 0.700000


Sight Plug Gage, NPT 2-11 1/2 Inches, Maximum Operating Pressure 500 PSI, Sight Diameter 1 7/8 Inches, Hex Diameter Flats 2 1/2 Inches, High PSI Fused Liquid Level, Open View, Glass

  • Note: Not intended for steam applications.

Liquid Level Sight Plugs/Checks
  • Can be used as an observation window to check burner flames, gears in motion, and relay or switch operation in sealed housings. Allow visual inspection of fluid levels in gear boxes or reservoirs. Low-pressure sight plugs feature stainless steel reflector to aid viewing of dark fluids. Solid brass body, clear glass sight, and Buna N seals. High-pressure sight plugs have a fused heavy glass window. Steel body with electroless nickel plating. Open view (no reflector).

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