Automotive & Heavy Duty Truck

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Automotive Assembly Line
Automotive Engine

McMasters Koss has supplied O-Rings, Gaskets and Seals for automotive braking systems, transmission, engine control, fuel systems and weatherproofing of critical components for over 40 years with proven history of meeting JIT delivery requirements.

McMasters Koss has developed several hundred elastomer and thermoplastic compounds that automotive manufacturers depend on.

Please Click Here to Download our Automotive Industry Brochure.

McMasters Koss is an established supplier of O-Rings, Gaskets and Seals used a in a variety of heavy duty truck engine, transmission, brake and suspension components.

Please visit the McMasters Koss youtube channel for our newest informative information or click Here to see our Truck Axle Seal Breakdown video.

Truck Axle Seal Video Link

McMasters Koss is an established supplier of O-Rings, Gaskets and Seals to construction and industrial equipment manufacturers.

Please Click Here to see our Construction Equipment Piston Seal Video.

McMasters Koss supplies O-Rings, Gaskets and seals for a variety of fuel and petroleum dispensing systems.

We offer Elastomers suitable for different levels of methanal/ethanol or other additives that are encountered throughout North America and the world.

Military Humvee

We are ITAR Compliant for critical military applications. Please reach out to our sales engineering team with any special requirements you might have.

Lead times shown are historic averages. Please call for current availability.
  • McMasters Koss Bulk Parts Shipment
    McMasters Koss Bulk Parts Shipment
  • McMasters Koss Commercial O-Ring Inventory Hallway
    McMasters Koss Commercial O-Ring Inventory Hallway
  • Customer Specific O-Ring Inventory
    Customer Specific O-Ring Inventory
  • McMasters Koss Bulk Inventory Area
    McMasters Koss Bulk Inventory Area
  • Shipping Department
    McMasters Koss Bulk OEM Storage Facility
  • Pallet ready to ship
    McMasters Koss JIT Delivery System
  • Durometer Tester
    McMasters Koss Durometer Testing Center
  • O-Ring Micro Vu Measurement
    McMasters Koss Inspection Capabiltiies
  • ASTM Specifications for O-Rings and Rubber Seals
    ASTM Specifications for Testing and Compliance
  • McMasters Koss Global Shipping
    McMasters Koss Global Shipments
  • McMasters Koss Headquarters Complex
    McMasters Koss Headquarters Complex
  • Oil Seal Environmental Test Machine
    McMasters Koss Oil Seal Environmental Test Chamber
  • Quad Rings
    Custom Molded Rubber Seals
  • Fluorocarbon O-Rings and Seals
    Fluorocarbon O-Rings and Molded Seals
  • Extruded Rubber Gasket
    Extruded Rubber Gasket
  • Custom Molded Rubber Seals
    Custom Molded Rubber Seals
  • O-Rings
    O-Rings
  • McMasters Koss PPAP with APQP Manuals
    McMasters Koss APQP Compliance
  • White Rubber Balls
    Custom Molded Ball Seals
  • Molded Rubber Seals
    Custom Molded Rubber Seals
  • Oil Seals
    Oil Seals
  • Custom Molded Seals
    Custom Molded Rubber Seals
  • Custom Molded Rubber Seals
  • Extruded Rubber O-Rings
    Extruded Rubber Seals