1.9mm Cross Section O-Rings NBR Nitrile Rubber 25mm - 140mm OD Oil Resistant Seal

The 1.9mm cross section represents the ideal balance for most general-purpose applications. It provides sufficient material for reliable sealing in medium-pressure applications (up to 1000 psi) while maintaining excellent flexibility for easy installation. This makes it perfect for automotive repairs, industrial maintenance, plumbing, and most DIY projects where you need dependable sealing performance without the stiffness of thicker O-rings.

Our 1.9mm NBR O-rings with 70A hardness are rated for medium-pressure applications, typically handling pressures up to 1000 psi (69 bar) with proper groove design. This makes them suitable for most automotive systems, hydraulic tools, industrial equipment, and plumbing applications. The 1.9mm thickness provides good extrusion resistance while maintaining flexibility, making it the go-to choice for a wide range of sealing needs.

To determine the correct O-ring size, measure either the groove where it will sit or the mating surfaces it will seal between. For groove installation, measure the groove ID and width. For surface sealing, measure the piston/rod diameter and housing bore. Our 1.9mm cross section requires a groove width of approximately 2.3-2.8mm. When replacing an existing O-ring, simply match its dimensions. Our size assortment kits are perfect for having multiple options available.

Yes, these NBR O-rings are excellent for hydraulic applications. They provide superior resistance to petroleum-based hydraulic fluids, including mineral oils and synthetic varieties. The 1.9mm cross section works well in hydraulic systems, power tools, and industrial equipment. For high-pressure hydraulic systems (above 1500 psi), consider our thicker cross section options, but for most general hydraulic applications, 1.9mm provides the perfect balance of performance and practicality.

Absolutely! We offer comprehensive assortment kits that include the most popular sizes from our 5mm-140mm OD range with 1.9mm cross section. These kits are ideal for repair technicians, maintenance professionals, and serious DIY enthusiasts who need various sizes readily available. Our kits are organized by size and come with a durable storage case. Check our store for current kit options and special bundle pricing.