MIL-STD-417 Silicone

MIL-STD-417 silicone from ElastaPro meets the requirements of a U.S. military standard for solid elastomeric materials. These spec-grade silicones have designations that begin with the letters “TA” followed a three-digit number. MIL-STD-417 was replaced by MS3065, which has been replaced by the ASTM D2000 standard.

Key Elements

  • Classification System: The standard assigns two-letter designations to elastomeric materials based on performance characteristics.
  • Performance Characteristics: These are physical and chemical properties of elastomers (e.g., temperature limits, oil/chemical resistance, compression set, etc.) that determine suitability as a military silicone.
  • Test Methods: Where practicable, MIL-STD-417 includes or references test methods for verifying the listed characteristics of solid silicone sheets.

Usage and Relevance

  • This standard was used by procurement and engineering to ensure consistent specification, classification, and testing of rubber components in military equipment.
  • Although the standard is now withdrawn for new design, it still may be referenced in older contracts, legacy hardware, or where qualification of an elastomeric material historically used under that classification system is relevant.
  • MIL-STD-417 classifications (e.g., “SB”, “RS”, “TA”, “CR”, “TB”) are used for specific elastomer types. These two-letter identifiers also map to ASTM D2000 designations.

MIL-STD-417 vs. ASTM D2000

Use the table below to map MIL-STD-417 designations to ASTM D2000 designations.

MIL-STD-417 ASTM D2000 Elastomer Type
RN AA Natural rubber (or synthetic equivalent) base elastomer
RS AA, BA Styrene-butadiene rubber (SBR) or a similar type
SA AK, BK Polysulfide rubber
SB BG Nitrile‐butadiene rubber (NBR) (i.e., nitrile)
SC BC Chloroprene rubber (CR) (i.e., neoprene)
TA FC, FS, FE, GE Silicone elastomer family (VMQ, etc)
TB DH Fluorocarbon elastomer family (FKM)

MIL-STD-417 Silicone from ElastaPro

The full list of TA designations that ElastaPro can meet appears below.

  • TA 405

  • TA 407

  • TA 505

  • TA 506

  • TA 507

  • TA 510

  • TA 512

  • TA 605

  • TA 606

  • TA 607

  • TA 608

  • TA 610

  • TA 612

  • TA 705

  • TA 706

  • TA 707

  • TA 710

  • TA 805

  • TA 806

  • TA 807

  • TA 810

Ask ElastaPro for MIL-STD-417 Silicone

ElastoPro produces solid sheets of MIL-STD-417 silicone at our Made in USA manufacturing facility, and in accordance with our ISO 9001:2105 and AS9100D certified Qualiyy Management System (QMS). Contact us to request a quote, or for more information.