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Retainers (Backup Rings), Hydraulic and Pneumatic, Polytetrafluoroethylene Resin, Single Turn, Scarf-Cut, For Use in AS4716 Glands
- Aerospace Standard
- AS5781A
- Revised
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This SAE Aerospace Standard (AS) covers scarf-cut polytetrafluoroethylene (PTFE) retainers (backup rings) for use in glands in accordance with AS4716. They are for use in hydraulic and pneumatic system components as anti-extrusion devices in conjunction with O-rings, packings and other elastomeric seals for static and dynamic applications.
Because of the construction of groove dimensions, backup rings specific to rod applications are designated “R” - Rod (Female), backup rings specific to piston applications are designated “P” - Piston (Male). Piston and rod types of virgin pigmented PTFE are also identified by color code which also distinguishes parts to this standard from those made from virgin PTFE to other standards.
Rationale
This revision updates the metric conversions and includes some minor editorial changes.
Recommended Content
| Aerospace Standard | Retainers (Backup Rings), Hydraulic and Pneumatic, Polytetrafluoroethylene Resin, Solid, Un-Cut, for Use in AS4716 Glands |
| Aerospace Standard | Indicator, Humidity, Plug, Color Change |
| Ground Vehicle Standard | Lubrication Fittings |
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 2B | Rod (female) applications - Backup ring dimensions in inches and degrees | |
| Table 2C | Piston (male) applications - Backup ring dimensions in millimeters and degrees | |
| Table 2D | Rod (female) applications - Backup ring dimensions in millimeters and degrees | |
| 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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