NAVY MIL-P-17553A
NAVY ML-P-17553A 1976-JUN-22 PACKNG PREFORMED O-RNG SYNTHETC RUBBER
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This specification covers synthetic rubber O-ring preformed packing used to provide both a high-pressure and a low-pressure seal within rockets. Only one type, grade, class, and composition of rubber as described in this specification will be acceptable. (See 6.1.)