標準號：SAE AS 5798-2007
中文標準名稱：特大型O型密封圈用航空航天尺寸標準
英文標準名稱：Aerospace Size Standard for Oversize O-rings
標準類型：V21
發布日期：2007/7/1 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：V21
國際標準分類號：49.080
引用標準：SAE AS 568B-2001;SAE AS 4716-1993;SAE AS 4724-2007;MIL-G-5514;MS 27595
適用范圍：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 10u- unit length per °C) were used for swell calculations. Applications that exceed these values should be evaluated for excessive gland fill.