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Retainers (Backup Rings), Hydraulic and Pneumatic, Polytetrafluoroethylene Resin, Single Turn, Scarf-Cut, For Use in AS4716 Glands
- Aerospace Standard
- AS5781B
- Revised
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This SAE Aerospace Standard (AS) specifies scarf-cut polytetrafluoroethylene (PTFE) retainers (backup rings) for use in glands in accordance with AS4716. They are usually used in hydraulic and pneumatic system components as anti-extrusion devices in conjunction with O-rings and other seals for static and dynamic applications.
NOTE: This specification includes material tests but does not include hydraulic or pneumatic performance tests.
Rationale
This document has been revised to:
-
Add the requirement that no resizing of parts during the manufacturing process is permitted
-
Clarify the use in AS4716 glands
-
Delete the dimensional stability test requirement of parts (since this test is performed on each lot of molded material as required by AMS3678)
-
Add the dimensional stability requirement of material tubes to 4.1
-
Include some editorial corrections and improvements
-
Update the references
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Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 | ||
| Table 1 | Materials and applications | |
| Table 2A | Piston (male) applications - backup ring dimensions in inches and degrees | |
| Table 2A | Piston (male) applications - backup ring dimensions in inches and degrees (continued) | |
| Table 2A | Piston (male) applications - backup ring dimensions in inches and degrees (continued) | |
| Table 2A | Piston (male) applications - backup ring dimensions in inches and degrees (continued) | |
| Table 2A | Piston (male) applications - backup ring dimensions in inches and degrees (continued) | |
| Table 2B | Rod (female) applications - backup ring dimensions in inches and degrees | |
| Table 2B | Rod (female) applications - backup ring dimensions in inches and degrees (continued) | |
| Table 2B | Rod (female) applications - backup ring dimensions in inches and degrees (continued) | |
| Table 2B | Rod (female) applications - backup ring dimensions in inches and degrees (continued) | |
| Table 2B | Rod (female) applications - backup ring dimensions in inches and degrees (continued) | |
| Table 2C | Piston (male) applications - backup ring dimensions in millimeters and degrees | |
| Table 2C | Piston (male) applications - backup ring dimensions in millimeters and degrees (continued) | |
| Table 2C | Piston (male) applications - backup ring dimensions in millimeters and degrees (continued) | |
| Table 2C | Piston (male) applications - backup ring dimensions in millimeters and degrees (continued) | |
| Table 2C | Piston (male) applications - backup ring dimensions in millimeters and degrees (continued) | |
| Table 2D | Rod (female) applications - backup ring dimensions in millimeters and degrees | |
| Table 2D | Rod (female) applications - backup ring dimensions in millimeters and degrees (continued) | |
| Table 2D | Rod (female) applications - backup ring dimensions in millimeters and degrees (continued) | |
| Table 2D | Rod (female) applications - backup ring dimensions in millimeters and degrees (continued) | |
| Table 2D | Rod (female) applications - backup ring dimensions in millimeters and degrees (continued) | |
| Unnamed Dataset 24 | ||
| Table 3 | Sample size |
Issuing Committee
A6C2 is responsible for the development of standards, processes, and practices related to Seals, Scrapers and Bearings used in actuation systems for Commercial and Military air vehicles. The panel provides a forum for government engineers, prime contractors, OEMs and suppliers to exchange technical information, regulatory updates, recent technology developments, issues related to system development and in service operation and lessons learned.
Reference
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