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NF T 47-501 O-ring standard specifications

发布时间:2019-08-02 22:32来源:上海赫希密封材料有限公司 点击:

About the NF T 47-501 standard for O-rings

The NF T 47-501 standard for O-rings is produced by the Association Française de Normalisation (French Standards Institute). The NF T 47-501 specification describes 447 O-rings and is very similar to the ISO 3601-1 standard. Each size is designated by a letter (A - E) indicating the cross-section. The last four digits indicate the inside diameter rounded to one-tenth millimeter.

In contrast to the AS 568 A inch system, the nominal and physical dimensions of metric O-rings match precisely. That is, a mm O-ring will have a cross-section of mm. The space that is being filled must be about 10% to 15% smaller than the cross-section of the O-ring in order for O-ring to seal properly.

文章出自上海赫希密封:https://www.heximf.com/jszc/20190802198.html
Tags: O-ring NF T 47-501
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