SAE AMS7269C-2019 PDF

Full title and description

SAE AMS7269C-2019 — Rubber: Silicone Rubber (PVMQ), Low Outgassing, Low Temperature Resistant, 45–55 Shore A Hardness — Material specification for molded sealing rings intended for space and vacuum service.

Abstract

This AMS material specification defines a peroxide‑cured silicone (PVMQ) elastomer compound formulated for low outgassing and low temperature resistance, supplied as molded rings (seals) with nominal Shore A hardness 45–55. It includes material, physical and performance requirements, test methods, acceptance criteria and procurement/QPL considerations for aerospace and space‑flight sealing applications. Revision C (2019) updated format and added program/QPL requirements while removing obsolete NASA references.

General information

• Status: Revised / Current
• Publication date: February 28, 2019
• Publisher: SAE International (SAE AMS series)
• ICS / categories: 49.025.40 (Rubber and plastics; elastomers for aerospace applications)
• Edition / version: AMS7269C (Revision C, 2019)
• Number of pages: 10

Scope

This specification covers a low‑outgassing silicone (PVMQ) rubber compound in the form of molded rings used as seals for space and vacuum service. It sets material composition/identification, allowable physical properties, required test methods (including outgassing and low temperature performance), inspection and acceptance criteria, marking and documentation, and procurement‑level quality requirements for manufacturers and suppliers.

Key topics and requirements

• Material type: Silicone (PVMQ) elastomer formulated for low outgassing and low temperature service.
• Hardness: Specified nominal Shore A range 45–55 with allowable tolerances.
• Low outgassing requirements: Limits on total mass loss and condensable volatile condensable materials appropriate for vacuum/space use.
• Physical properties: Tensile strength, elongation, compression set, density and dimensional stability requirements before and after specified aging cycles and thermal exposures.
• Low temperature performance: Specified tests and acceptance limits to demonstrate functional sealing at low service temperatures.
• Manufacturing and quality: Molded ring configuration, cure control, lot identification, inspection, and marking requirements; inclusion of QPL/qualified product listing requirements in the revision.
• Test methods and reporting: Defined test procedures for verification and required documentation with deliveries (material certifications and test reports).
• Procurement notes: Requirements for traceability, shelf life/handling, and removal of obsolete external references (e.g., legacy NASA specs) in the 2019 revision.

Typical use and users

Used by aerospace primes, spacecraft integrators, avionics and propulsion system suppliers, seal manufacturers, and procurement/specification engineers who require reliable low‑outgassing seals for vacuum, spaceflight or cryogenic/low‑temperature applications. Typical uses are O‑rings and molded seal rings in satellites, instruments, vacuum systems and space vehicle assemblies where contamination control and low temperature elasticity are critical.

Related standards

Commonly referenced or associated documents include other AMS elastomer specifications (for example AMS2817 series for silicone O‑rings), AS568 series (O‑ring sizes), AS871 series (elastomer identification/performance), and supplier/qualification documents (QPL entries) used by aerospace purchasers. The 2019 revision reorganized content to align with the modern AMS 7XXX series template and procurement practices.

Keywords

AMS7269C, silicone, PVMQ, low outgassing, low temperature, seals, molded rings, Shore A 45–55, aerospace, vacuum service, elastomer specification, SAE International.

FAQ

Q: What is this standard?

A: AMS7269C is an SAE aerospace material specification that defines a low‑outgassing silicone (PVMQ) rubber compound supplied as molded sealing rings, intended for space and vacuum service with a nominal hardness of 45–55 Shore A. Revision C was issued in 2019.

Q: What does it cover?

A: It covers material composition/identification, physical and performance characteristics (hardness, tensile, elongation, compression set, low temperature behavior), outgassing limits, required test methods, acceptance criteria, marking, documentation and supplier qualification/procurement requirements for molded silicone sealing rings.

Q: Who typically uses it?

A: Aerospace manufacturers, spacecraft integrators, seal and O‑ring suppliers, quality and procurement engineers, and test laboratories that produce or verify seals for vacuum and spaceflight applications.

Q: Is it current or superseded?

A: AMS7269C (Revision C, February 28, 2019) is the current revision of the AMS7269 series. It supersedes AMS7269B (2003) and earlier editions.

Q: Is it part of a series?

A: Yes. AMS7269C is part of the SAE AMS elastomer/materials series (AMS7XXX family) covering elastomer compounds and seal configurations used in aerospace. It is commonly used alongside other AMS and AS specifications for O‑ring sizes and elastomer performance.

Q: What are the key keywords?

A: Silicone, PVMQ, low outgassing, low temperature, molded rings, seals, Shore A 45–55, AMS7269C, SAE, aerospace, vacuum service, QPL.