Automotive & Heavy Duty Truck

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.

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 Inventory for JIT Delivery
  • Shipping Department
  • Pallet ready to ship
  • Durometer Tester
  • O-Ring Micro Vu Measurement
  • ASTM Standards for O-Rings
  • McMasters Koss Global Shipping
  • McMasters Koss Headquarters Complex
  • Oil Seal Environmental Test Machine
  • Quad Rings
  • Fluorocarbon O-Rings and Seals
  • 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