Specifications

Military Specifications

Military Specifications were designed by the United States Defense Department and typically start with MIL-. These "Mil Specs" are a standardization of specific properties of materials that are important in many applications.

Request More Information

Some commonly used Mil Specs are:
Mil Spec Polymer Grades/Hardness Properties
MIL-PRF-6855 CL1 GR XX NITRILE 40-80 Fuel and oil resistance, good compression set, good low temperature
MIL-PRF-6855 CL2 TYA GR XX NEOPRENE 30-80 Moderate fuel and oil resistance, good ozone resistance, good compression set, good low temperature
MIL-PRF-6855 CL2 TYB GR XX NEOPRENE 30-80 Moderate fuel and oil resistance, ozone resistance, good compression set. Good low temperature
MIL-PRF-6855 CL3 GR XX SBR 40-80 Not resistant to fuel and oil, not ozone resistance, good compression set, high resiliency
MIL-PRF-6855 CL4 TYA GR XX NEOPRENE 40-80 Non Migrating to Acrylics, moderate fuel and oil resistance, good ozone resistance, good compression set
MIL-PRF-6855 CL5 GR XX SBR 40-80 Non Migrating to Acrylics, good compression set

Inorganics

ZZ-R-765 superseded by A-A-59588 Silicone specification

Rubber, Silicone

The General Service Administration has authorized the use of this commercial item description for all federal agencies.

  1. 1. SCOPE. This commercial item description (CID) covers six classes of silicon rubber, in various grades.
  2. 2. CLASSIFICATION. The silicon rubber shall be of the following classes and grades, as specified:
    • Class 1A - Low temperature resistant.
      • Grades 40, 50, 60, 70, 80
    • Class 1B - Low temperature resistant and low compression set at high temperature.
      • Grades 40, 50, 60, 70, 80
    • Class 2A - High temperature resistant.
      • Grades 25, 40, 50, 60, 70, 80
    • Class 2B - High temperature resistant and low compression set.
      • Grades 40, 50, 60, 70, 80
    • Class 3A - Low temperature, tear and flex resistant.
      • Grades - 30, 50, 60
    • Class 3B - Tear and flex resistant.
      • Grades - 30, 50, 60, 70, 80

ASTM Specifications

ASTM International Material Manufacturing

The international American Society Of Testing And Materials created an ingenious system that describes specific properties of materials in a standard way. We manufacture to all ASTM-D specifications.

Our customer service department is well trained, knowledgeable and has powerful resources available to help you get exactly what you need at the best possible price.


The typical scale that we use here at VIP Rubber and Plastic is the Shore A scale. Occasionally in plastic, we use the Shore D scale. The following image shows you, using some everyday items, what the "hardness" feels like. In addition, if you are not sure what hardness to pick, our customer service representatives would love to send you samples today!

Shore Hardness Scales