Mil-R-6855-E
Explore MIL-R-6855E rubber materials for military and aerospace applications. Find O-rings, gaskets, seals, and custom parts manufactured to meet legacy military specification requirements for demanding environments.
MIL-R-6855E is a legacy military rubber specification covering elastomer materials used in demanding military and aerospace sealing applications. These compounds are engineered to provide reliable performance in O-rings, gaskets, seals, and custom molded parts exposed to fuels, hydraulic fluids, lubricants, weather, and elevated temperatures. Although MIL-R-6855E has been superseded by newer military and aerospace standards, many legacy systems and drawings continue to reference this specification, making compliant or equivalent materials essential for maintenance, replacement, and ongoing production. Materials meeting MIL-R-6855E requirements are commonly compared to equivalent compounds from manufacturers such as Parker and are widely used where long-term reliability and specification compliance are critical.
MIL-R-6855E encompasses several elastomer families, including NBR, FKM, EPDM, Silicone, and other specialty compounds selected according to the required fluid compatibility, temperature range, and environmental resistance. These materials are commonly used in O-rings and gaskets for aircraft, military vehicles, hydraulic systems, fuel systems, and industrial equipment operating under harsh conditions. Modern compounds manufactured to equivalent military and aerospace requirements continue to provide excellent resistance to oils, fuels, ozone, weathering, and thermal cycling while supporting legacy equipment and new production. Selecting the correct MIL-R-6855E equivalent material helps ensure long service life, dependable sealing performance, and compatibility with demanding military and aerospace applications.
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