Used on ground and airborne gas turbine engines,auxiliary power units accessories and parts. skin is made of synthetic rubber per mil-r-6853, cl ii, gd 40, insert is made of steel per astm a 569-72 non-circular
Used on ah-64 apache helicopter. seal, plain encased-generator main transmission 2 psi max operating pressurem mil-l-23699 oil lubricant plastic case surface treated