Lok Seal

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Lok Seal Sealing RingsLok Seal Rings Custom Lock Seal Ring Manufacturer

An alternative to Grover’s Permaseal® design for mobile and industrial hydraulic, shock absorber, air compressor, and gas turbine applications.

Our Lok Seal design features a bi-directional seal that provides for superior sealing efficiency designed to pass open ports and close the leak pattern through to joint.

Available in a wide range of sizes and are manufactured in 12 materials with choices of manganese phosphate and electroless PTFE/nickel coatings.

Available Features

  • Chamfer
  • Radius
  • Groove
  • Bronze Insert
  • Taper

Size Range

  • 1.5" - 90"
  • 38.1MM - 2,286MM


  • Mobile Hydraulics
  • Industrial Hydraulic
  • Gas Turbine
  • Air Compressor
  • Shock Absorbers


  • Cast Iron
  • Ductile Iron
  • Ni-Resist
  • Bronze
  • PTFE
  • Stainless Steel Nickel-Based Alloys
  • Steel
  • PEEK


  • Manganese Phosphate
  • Tin & Tin Nickel
  • Electroless PTFE/Nickel
  • Chrome
  • SIlver Lead Indium