Rubber: Butyl (IIR Abbreviation), Phosphate Ester Resistant, 65 to 75 Hardness, for Seals in Hydraulic Systems, etc.
Edition 2019-07-18

Rubber: Ethylene Propylene (EP) Phosphate Ester Resistant Low Temperature Tg -67 °F (-55 °C), 75 to 85 Type M Hardness for Seals in Hydraulic Systems
Edition 2023-12-13

Rubber: Fluorocarbon Elastomer (FKM) Low Temperature Sealing Tg -40 °F (-40 °C) 70 to 80 Type 'A' Hardness For Elastomeric Seals in Aircraft Engine Oil, Fuel and Hydraulics Systems
Edition 2020-05-18

Rubber: Fluorocarbon Elastomer (FKM) Aircraft Engine Oil, Fuel and Hydraulic Fluid Resistant 70 to 80 Shore Type A Hardness Low Temperature Sealing Tg -47 °F (-43.9 °C) for Elastomeric Seals in Aircraft Engine, Fuel and Hydraulic Systems
Edition 2021-10-06

Rubber: Butyl (IIR), Low Compression Set and Low Moisture/Gas Permeability, 65 to 75 Type A Hardness, for Seals in Desiccated or Other Systems Requiring Resistance to Gas and/or Water Vapor Permeation
Edition 2019-07-18

Rolling Element Bearing Hardness Test
Edition 2017-07-24

Radiation Hardness Assurance
Edition 2021-07-07

Paints and related materials - Methods of test - Determination of pencil hardness of paint film
Edition 1996

Methods of test for elastomers - International rubber hardness
Edition 2000

Methods of test for elastomers - Durometer hardness
Edition 1990