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Standard

Identification and Packaging Elastomeric Products
2024-03-04
CURRENT
AMS2810J
This specification provides requirements for the identification and packaging of sheet, strip, extrusions, and molded parts made of natural rubber, synthetic rubber, reclaimed rubber, and combinations of the above with other materials such as asbestos, cork, and fabrics. AMS2817 covers preferred requirements for identification and packaging of preformed packings.
Standard

Elastomer: Fluorocarbon (FKM) Rubber High-Temperature-Fluid Resistant Low Compression Set / 85 to 95 Type A Hardness For Seals in Fuel Systems and Specific Engine Oil Systems
2023-11-10
CURRENT
AMS3218E
This specification covers a fluorocarbon (FKM) elastomer that can be used to manufacture product in the form of sheet, strip, tubing, extrusions, and molded shapes. For molded rings, compression seals, molded O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications, use the AMS7259 specification.
Standard

Elastomer: Fluorosilicone Rubber (FVMQ), Fuel and Oil Resistant, High Strength, 45 – 55 Shore A Hardness, For Products in Fuel Systems / Lubricating Oils
2023-10-16
CURRENT
AMS3329D
This specification covers a high strength 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, molded O-ring cord, and molded in place gaskets for aeronautical and aerospace applications.
Standard

Elastomer: Fluorosilicone (FVMQ) Rubber Fuel and Oil Resistant 45 - 55 Shore A Hardness For Products in Fuel Systems/Lubricating Oils
2023-08-16
CURRENT
AMS3330D
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, molded O-ring cord, and molded in place gaskets for aeronautical and aerospace applications.
Standard

Rubber: Fluorosilicone (FVMQ), Engine Oil / Fuel-Resistant, For Seals in Engine Oil Systems/Fuel Systems
2023-06-27
CURRENT
AMSR25988B
This material has resistance to diester-based engine oil (MIL-PRF-7808) and fuel, but usage is not limited to such applications. This material is not suitable for use in synthetic phosphate ester based hydraulic fluids (AS1241) or helicopter transmission lubricating oils (DOD-PRF-85734, MIL-PRF-32538). For gas turbine engine lubricating oils (AS5780, MIL-PRF-23699), resistance varies by class and should be evaluated individually (see Note regarding high performance oils). This material has a typical service temperature range of -70 to +392 °F (-56.7 to +200 °C) for Class 1 and Class 2 and -70 to +437 °F (-56.7 to +225 °C) for Class 3. The service temperature range of the material is a general temperature range, but the presence of particular fluids and specific design requirements may modify this range. Each application should be considered separately.
Standard

Elastomer: Fluorocarbon (FKM) Aircraft Engine Oil, Fuel and Hydraulic Fluid Resistant Low Temperature Sealing Tg -40 °F (-40 °C) / 70 to 80 Hardness, for Products in Aircraft Engine Oil, Fuel, and Hydraulics Systems
2023-03-20
CURRENT
AMS3353A
This specification covers a fluorocarbon elastomer that can be used to manufacture product in the form of sheet, strip, tubing, extrusions, and molded shapes. For molded rings, molded compression seals, and molded-in-place gaskets for aeronautical and aerospace applications, use the AMS7379 specification.
Standard

Fluorocarbon Elastomer (FKM) High Temperature/HTS Oil Resistant/Fuel Resistant Low Compression Set/70 to 80 Hardness, Low Temperature Tg -22 °F (-30 °C), for Seals in Oil/Fuel/Specific Hydraulic Systems
2022-09-08
CURRENT
AMS7287A
This specification covers a high temperature, compression set, and fluid resistant fluorocarbon (FKM) elastomer in the form of molded O-rings, molded compression seals, molded O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications. For sheet, strip, tubing, extrusions, and molded shapes, use the AMS3384 specification.
Standard

Elastomer: Chloroprene Rubber (CR) Weather Resistant 55 - 65
2022-06-13
CURRENT
AMS3241K
This specification covers a chloroprene (CR) rubber that can be used to manufacture product in the form of sheet, strip, tubing, extrusions, and molded shapes such as window channels, bumper pads, chafing strips, etc. For molded rings, compression seals, molded O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications, use the equivalent AMS7XXX specification.
Standard

Elastomer: Chloroprene Rubber (CR) Weather Resistant 35 - 45
2022-06-13
CURRENT
AMS3240L
This specification covers a chloroprene rubber (CR) that can be used to manufacture product in the form of sheet, strip, tubing, extrusions, and molded shapes such as window channels, bumper pads, chafing strips, etc. For molded rings, compression seals, molded O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications, use the equivalent AMS7XXX specification.
Standard

Rubber, Ethylene-Propylene, Hydrazine Resistant
2021-07-21
WIP
AMSR83412B
This specification covers three types of rubber having good resistance to high and low temperature and hydrazine type propellants, but poor resistance to hydrocarbon oils or solvents. Hydrazines are hazardous chemicals. See Dangerous Properties of Industrial Materials; by N. Irving Sax.
Standard

Rubber: Vinyl-Methyl Silicone (VMQ) Hot Air Resistant Low Compression Set, 70 to 80 Type A Hardness for Seals in Hot Air Systems
2021-05-19
CURRENT
AMS7267H
This specification covers a silicone (VMQ) rubber in the form of molded rings. These rings have been used typically as sealing rings for service from -65 to +260 °C (-85 to +500 °F) in contact with air, 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.
Standard

Designing with Elastomers for use at Low Temperatures, Near or Below Glass Transition
2020-11-12
WIP
AIR1387E

To ensure success in design of elastomeric parts for use at low temperature, the design engineer must understand the peculiar properties of rubber materials at these temperatures.

There are no static applications of rubber. The Gaussian theory of rubber elasticity demonstrates that the elastic characteristic of rubber is due to approximately 15% internal energy and the balance, 85%, is entropy change. In other words, when an elastomer is deformed, the elastomer chain network is forced to rearrange its configuration thereby storing energy through entropy change. Thermodynamically, this means that rubber elasticity is time and temperature dependent (Reference 25).

The purpose of this report is to provide guidance on low temperature properties of rubber with the terminology, test methods, and mathematical models applicable to rubber, and to present some practical experience.

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