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Standard

Patterns of O-Ring Failures

2019-11-19
CURRENT
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

Static Seal Test Fixture and Procedure

2019-11-05
CURRENT
AS7982
This SAE Aerospace Standard (AS) provides dimensions and procedures for a standardized test fixture used to evaluate the static performance of O-rings and other seal types in glands per AS4716 and AS5857.
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

Rubber: Fluorocarbon Elastomer (FKM) 70 to 80 Hardness, Low Temperature Sealing Tg -50 °F (-46 °C) For Elastomeric Seals in Aircraft Engine Oil, Fuel and Hydraulics Systems

2019-05-21
WIP
AMS7410
1.1 Form This specification covers high temperature, compression set and fluid resistant fluorocarbon elastomer material to be used in the form of O-rings, compression seals, O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications. 1.2 Application These products have resistance to a variety of gas turbine engine oils, including high thermal stability (HTS) oils, fuels, and hydraulic fluids, but usage is not limited to such applications. Each application should be considered separately. This fluorocarbon (FKM) has a service temperature range of -65 to +400 °F (-54 to +204 °C) in air. 1.3 Safety - Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards, which may be involved in such use.
Standard

Rubber, Silicone 1200 Psi (8.27 Mpa), High Modulus 45-55

2019-05-10
WIP
AMS3347D
This specification covers a silicone rubber in the form of sheet, strip, tubing, extrusions and molded shapes. Primarily for parts required to operate or seal from -75 to +205 degrees C (-103 to +401 degrees F), compounded especially for high strength. Silicone elastomer is resistant to deterioration by weathering and by high-aniline-point-petroleum-base oils and remains flexible over the temperature range noted. These products are not normally suitable for use in contact with gasoline or aromatic fuels and low-aniline-point petroleum-base fluids due to excessive swelling.
Standard

Ethylene Propylene (EPM) Rubber, Phosphate Ester Resistant, 55-65

2019-05-07
WIP
AMS3248D
This specification covers an ethylene propylene (EPM) rubber in the form of sheet, strip, tubing, molded shapes, and extrusions. Primarily for parts, such as gaskets, grommets, and seals requiring resistance to phosphate esters and/or to ozone. Not suitable for use in contact with petroleum base fluids due to excessive swell.
Standard

Elastomer: Fluorosilicone Rubber (FVMQ) Fuel and Oil Resistant 75 - 85 Durometer Type “A” Hardness For Products in Fuel Systems/Lubricating Oils

2019-02-28
CURRENT
AMS3741
This specification covers a fluorosilicone (FVMQ) elastomer that can be used to manufacture product in the form of sheet, strip, tubing, extrusions, and molded shapes. 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

Elastomer: Fluorosilicone Rubber (FVMQ) High Temperature, High Modulus, Fuel and Oil Resistant 70 - 80 Shore A Hardness For Products in Fuel Systems/Lubricating Oils

2019-02-27
CURRENT
AMS3327E
This specification covers a fluorosilicone (FVMQ) elastomer that can be used to manufacture product in the form of sheet, strip, and molded shapes. 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

Rings, Sealing, Butadiene-Acrylonitrile (Nbr) Rubber Synthetic Lubricant Resistant 67-75

2018-10-09
WIP
AMS7272H
This specification covers a butadiene-acrylonitrile (NBR) rubber in the form of molded rings. These rings have been used typically as sealing rings in contact with diester synthetic lubricants in service up 150 degrees C (302 degrees F), but usage is not limited to such applications. The cross-section of such rings is usually not over 0.275 inch (6.98 mm) in diameter or thickness.
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