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Standard

Hardness Testing of Elastomeric O-Rings

2019-11-02
WIP
AIR4738B
This SAE Aerospace Information Report (AIR) provides a general description of methods for hardness testing of O-Rings including factors which affect precision and comparison of results with those obtained in standard tests.
Standard

Acrylonitrile Butadiene (Nbr) Rubber, Aromatic Fuel Resistant, 55-65

2019-10-25
WIP
AMS3212Q
This specification covers a nitrile (NBR) rubber in the form of sheet, strip, tubing, extrusions, and molded shapes. These products have been used typically for parts, such as gaskets, diaphragms, bushings, grommets, and sleeves, requiring resistance to aromatic and aliphatic fuels when continuously or alternately exposed to both, but usage is not limited to such applications.
Standard

Acrylonitrile Butadiene (Nbr) Rubber, Hot Oil and Coolant Resistant, Low Swell, 45-55

2019-10-25
WIP
AMS3226J
This specification covers a nitrile (NBR) rubber in the form of sheet, strip, tubing, extrusions, and molded shapes. Primarily for hose, packings, bushings, grommets, and seals in contact with hot, petroleum-base lubricating oils and glycol-type coolants from -40 degrees to +100 degrees C (-40 degrees to +212 degrees F).
Standard

Silicone Rubber, 1000 psi (6.89 MPa) Minimum Tensile Strength, 45 - 55 Durometer

2019-10-25
WIP
AMS3345G
This specification covers a silicone rubber material that can be used to manufacture product in the form of sheet, strip, tubing, molded shapes, and extrusions.

This specification should not be used to address products such as O-rings, compression seals, O-ring cord, and molded-in-place gaskets. For these applications AMS specifications in the AMS7XXX series should be used.

Standard

Elastomer: Phenyl Methyl Vinyl Silicone (PVMQ), Low Temperature/Engine Oil Resistant, High Strength/High Tear, 55 to 65 Type “A” Hardness, For Products in Aircraft Piston Engine Oil/Low Temperature Environments

2019-10-24
CURRENT
AMS3346H
This specification covers a phenyl vinyl silicone rubber material that can be used to manufacture product in the form of sheet, strip, tubing, molded shapes, and extrusions. This specification should not be used for molded rings, compression seals, O-ring cord, and molded in place gaskets for aeronautical and aerospace applications without complete consideration of the end use prior to the selection of this material.
Standard

Suitable Test Sizes for O-ring Specifications

2019-09-27
WIP
ARP3050A
There are many tests that have been developed to characterize rubber O-rings. Many of these tests are independent of the size of the O-ring being tested. However, there are some tests, specifically, stress/strain properties, that are a function of the O-ring's size. The purpose of this report is to provide guidelines for specifying O-rings that would be considered "suitable for testing " when writing O-ring material specifications.
Standard

Patterns of O-ring Failures

2019-08-12
WIP
AIR1707C
The information presented herein describes the commonly observed patterns of O-ring failure by means of both text and illustration. Possible causes and corrective actions are indicated for alleviating the problem.
Standard

Synthetic Rubber Hot Oil Resistant, High Swell 45 - 55

2019-07-29
CURRENT
AMS3222J
This specification covers a synthetic rubber in the form of sheet, strip, tubing, extrusions, and molded shapes. This specification should not be used for molded rings, compression seals, O-ring cords, and molded in place gaskets for aeronautical and aerospace applications without complete consideration of the end use prior to the selection this material.
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