SAE AMS-R-25988: Rubber, Fluorosilicone Elastomer, Oil-and-Fuel-Resistant, Sheets, Strips, Molded Parts, and Extruded Shapes
SDO: SAE: SAE International
DOD Adopted ANSI Approved Approved
This specification covers oil-and-fuel-resistant fluorosilicone elastomer rubber sheets, strips, molded parts, and extruded shapes for aeronautical and aerospace applications.
The fluorosilicone elastomer rubber shall be of the following types, classes, and grades, as specified (see 6.2).
Type I--O-rings (available only in class 1, grades 60, 70, and 80 and class III, grade 75).
Type II--Molded parts (other than O-rings) sheets, strips, and extruded shapes.
Class 1--General purpose.
Grade 40--Nominal 40 type A durometer hardness, type II, only.
Grade 50--Nominal 50 type A durometer hardness, type II, only.
Grade 60--Nominal 60 type A durometer hardness, type I and II.
Grade 70--Nominal 70 type A durometer hardness, type I and II.
Grade 80--Nominal 80 type A durometer hardness, type I and II.
Class 2--High-strength general purpose, type II, only.
Class 3--High modulus, increased temperature resistance, type I and II.
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