Relief/Filler Vent Plug, 1/4-18, 0.59 H Price For: Each Dia. Hex Flats (In.): 9/16 Filter: 20 Micron Vacuum (In. Hg): - Application: Dual Purpose Relief or Filler Vent Plugs can be Used for Gearbox Housings and Bearings to Eliminate Excessive Pressure, Automatic Reset for Continuous Duty Item: Relief/Filler Vent Plug Thread Size: 1/4-18 PTF Height: 0.59 Top Cap Dia. (In.): 7/16 Base Square (In.): - Overall Length (In.): 1-1/8 PSI: 1-5 Construction: Brass and Plated Steel Max. Operating PSI: - Max. Operating Temp.: - Type: - Country of Origin (subject to change): United States