McMasters Koss stocks most AS568 size O-Rings in the most popular compounds including Nitrile, Silicone, EPDM and Fluorocarbon (Viton)

Metric Sizes including JIS (Japanese Industrial Size) European and traditional metric are available for appropriate applications.

Aircraft Wing

Aerospace and MIL SPEC O-Rings are available for critical applications.

Special packaging available for compliance to specifications or custom customer requirements.

Custom Size or Non Standard O-Rings are available for quick production and can be stocked for JIT delivery with any blanket order.

O-Ring Micro Vu Measurement
Shore A Type M Durometer Tester

Various Durometer compounds are available for different pressure or temperature requirements. Shore A Durometer and IRHD Durometer requirements can be met.

McMasters Koss Supplies O-Rings meeting many demanding automotive manufacturer requirements and can meet new specifications as they are developed.

Automotive OEM Material Specifications
ASTM Standards for O-Rings

McMasters Koss supplies and develops elastomers to meet a variety of ASTM and industry specifications. We can certify to your ASTM requirement or assist your team in specifying the right material.

O-Rings can be provided with dot markings, exterior coatings for lubricity or color differentiation.

Let us know what marking or lubricity goals you want to achieve and we can recommend best options for your group.

Coating of Seals
  • McMasters Koss Bulk Parts Shipment
  • McMasters Koss Commercial O-Ring Inventory Hallway
  • Customer Specific O-Ring Inventory
  • McMasters Koss Bulk Inventory Area
  • Shipping Department
  • Pallet ready to ship
  • Durometer Tester
  • O-Ring Micro Vu Measurement
  • ASTM Specifications for O-Rings and Rubber Seals
  • McMasters Koss Global Shipping
  • McMasters Koss Headquarters Complex
  • Oil Seal Environmental Test Machine
  • Quad Rings
  • Fluorocarbon O-Rings and Seals
  • Extruded Rubber Gasket
  • Custom Molded Rubber Seals
  • O-Rings
  • McMasters Koss PPAP with APQP Manuals
  • White Rubber Balls
  • Molded Rubber Seals
  • Oil Seals
  • Custom Molded Seals
  • Extruded Rubber O-Rings