SAE Standards Works
E-25 General Standards for Aerospace and Propulsion Systems
AS5351 - PACKING, PREFORMED - O-RING SEAL AMS 7257
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James S. Barnett
PACKING, PREFORMED - O-RING SEAL AMS 7257
This standard is for an O-rings made from AMS 7257, perfluorcarbon (FFKM) material using standard sizes that conform to AS568 dimensions.
This standard is being developed to provide industry with an o-ring made from perfluorcarbon material, AMS 7257 (FFKM), with sizes conforming to AS568. Currently, O-rings made from this material were sized to fit existing groove making the o-ring sizes special because of high thermal expansion. The current ARP groove standards are going to be revised to accommodate a larger volume of material due to the high thermal expansion of this material.