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Manufacturing and Inspection Standards for Preformed Packings (O-Rings)

2019-05-09
WIP
AS871C
This specification controls surface condition, manufacturing defects and inspection requirements, and defines methods of measurement for elastomeric toroidal sealing rings (O-rings) for static (including gasket) applications. The specification refers only to O-rings produced by molding processes and does not cover scarf-jointed O-rings manufactured from fully-cured round cords.
Standard

Aerospace Size Standard for O-rings

2019-03-06
WIP
AS568E
This SAE Aerospace Standard (AS) specifies the inside diameters, cross-sections, tolerances, and size identification codes (dash numbers) for O-rings used in sealing applications and for straight thread tube fitting boss gaskets. The dimensions and tolerances specified in this standard are suitable for any elastomeric material provided that suitable tooling is available.
Standard

Aerospace Size Standard for Oversize O-rings

2019-01-04
WIP
AS5798A
This SAE Aerospace Standard (AS) is applicable to military and commercial aircraft. It specifies the dimensions, tolerances and size codes (dash numbers) for use in glands per MIL-G-5514 where squeeze at low temperature is often insufficient to provide a leak-tight seal. The dimensions and tolerances specified in this standard are suitable for any elastomeric material. This standard should not be used as a part standard, therefore no part numbers like AS5798-001X shall be created. Each dash number, which should be appended to an appropriate drawing or standard number, identifies one size O-ring only. An AS5798 sized O-ring is intended to replace an AS568 sized O-ring of the same dash number. An X suffix is part of the dash number to signify oversize. Temperature limitations of 275 °F (135 °C) and coefficient of thermal expansion of 9.0 x 10⁻⁵ unit length per °F (1.6 x 10⁻⁴ unit length per °C) were used for swell calculations.
Standard

Gland Design, Elastomeric O-Ring Seals, Static Radial

2018-12-19
WIP
ARP1232C
This document establishes standard gland dimensions for static radial O-ring seal applications and provides recommendations for modifying these glands in applications. No provisions are made in this document for anti- extrusion devices. SI unit conversions for U.S. customary units have been provided for reference purposes.
Standard

Gland Design, Elastomeric O-Ring Seals, Dynamic Radial, 1500 psi Max

2018-12-19
WIP
ARP1233B
The purpose of this document is to provide the aerospace industry with standardized dimensional criteria for dynamic radial elastomeric O-ring seal glands. It is intended for use in conjunction with ARP 1231, "Gland Design, Elastomeric O-Ring Seals, General Considerations". This document establishes standard gland design criteria and dimensions for dynamic radial O-ring seal applications and provides recommendations for modifying these glands in special applications. There are no provisions in this document for anti- extrusion devices.
Standard

Gland Design, Elastomeric O-Ring Seals, Static Axial, Without Back-Up Rings

2018-12-19
WIP
ARP1234C
The purpose of this document is to provide the aerospace industry with standardized dimensional criteria for static axial elastomeric O-ring seal glands, without back-up rings. It supplements ARP 1231, "Gland Design, Elastomeric O-Ring Seals, General Considerations". This document establishes standard gland design criteria and dimensions for static axial O-ring seal applications without anti-extrusion devices. SI Unit conversions for U.S. Customary Units have been provided for reference purposes. The criteria herein are similar, but not identical, to those in MIL-G-5514.
Standard

Gland Design, Elastomeric O-Ring Seals, General Considerations

2018-12-19
WIP
ARP1231C
This document establishes general gland design criteria for static and dynamic O-ring seal applications used in fluid systems and at fluid pressures common to the aerospace industry. Detailed discussion of design criteria and tables of recommended gland dimensions are contained in the documents listed in Table 1. S.I. unit conversions for U.S. customary units have been provided for reference purposes.
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