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.
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.
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.
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.
McMasters Koss Bulk Parts Shipment 
McMasters Koss Commercial O-Ring Inventory Hallway 
Customer Specific O-Ring Inventory 
McMasters Koss Bulk Inventory Area 
McMasters Koss Bulk OEM Storage Facility 
McMasters Koss JIT Delivery System 
McMasters Koss Durometer Testing Center McMasters Koss Inspection Capabiltiies ASTM Specifications for Testing and Compliance 
McMasters Koss Global Shipments 
McMasters Koss Headquarters Complex 
McMasters Koss Oil Seal Environmental Test Chamber 
Custom Molded Rubber Seals 
Fluorocarbon O-Rings and Molded Seals 
Extruded Rubber Gasket 
Custom Molded Rubber Seals 
O-Rings 
McMasters Koss APQP Compliance 
Custom Molded Ball Seals 
Custom Molded Rubber Seals 
Oil Seals 
Custom Molded Rubber Seals 
Custom Molded Rubber Seals 
Extruded Rubber Seals