{"id":24666,"date":"2021-11-05T08:24:03","date_gmt":"2021-11-05T07:24:03","guid":{"rendered":"https:\/\/nh-oring.de\/iso-3601-o-ring-lexicon\/"},"modified":"2025-05-07T12:29:33","modified_gmt":"2025-05-07T10:29:33","slug":"iso-3601-o-ring-lexicon","status":"publish","type":"page","link":"https:\/\/nh-oring.de\/en\/iso-3601-o-ring-lexicon\/","title":{"rendered":"ISO 3601 | O-Ring Lexicon"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"24666\" class=\"elementor elementor-24666 elementor-11322\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8200179 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8200179\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-a712081\" data-id=\"a712081\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5dc3b6f elementor-widget elementor-widget-heading\" data-id=\"5dc3b6f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">ISO 3601 standard<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-3fe3938 elementor-hidden-mobile\" data-id=\"3fe3938\" data-element_type=\"column\" data-e-type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0c03d4d elementor-view-default elementor-widget elementor-widget-icon\" data-id=\"0c03d4d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<i aria-hidden=\"true\" class=\"fas fa-book-open\"><\/i>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f221bc5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f221bc5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3f0d219\" data-id=\"3f0d219\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3e9b23e elementor-widget elementor-widget-heading\" data-id=\"3e9b23e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span style=\"background-color:#fe5050;color: #ffffff;padding: 5px\">#1<\/span> What is ISO 3601 and why is it so important?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-add44b5 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"add44b5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-40e58b3 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"40e58b3\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b54c350\" data-id=\"b54c350\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b0bf388 elementor-widget elementor-widget-text-editor\" data-id=\"b0bf388\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>ISO 3601 is by far the most important and recognized standard in the world of O-rings. It is the international basis for dimensional tolerances, quality acceptance criteria and size charts.<\/p><p>As an illustration: The manufacture and evaluation of O-rings is to be evaluated so naturally in accordance with the specifications of ISO 3601 that it is hardly mentioned in any article texts or\u00a0<span style=\"color: #fe5050;\"><br \/><a style=\"color: #fe5050;\" href=\"https:\/\/nh-oring.de\/en\/?page_id=23955\" target=\"_blank\" rel=\"noopener\">data sheets<\/a>.<\/span>\u00a0It is internationally accepted that ISO 3601 counts.<\/p><p>Important note: The\u00a0<span style=\"color: #fe5050;\"><a style=\"color: #fe5050;\" href=\"https:\/\/nh-oring.de\/en\/o-ring-standard-iso-3601-design-simply-explained\/\" target=\"_blank\" rel=\"noopener\">international ISO 3601 standard<\/a>\u00a0<\/span>has replaced the German standard DIN 3771 since 2010. DIN 3771 is therefore no longer valid.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c593984 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c593984\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4b2029b\" data-id=\"4b2029b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0eeb770 elementor-widget elementor-widget-heading\" data-id=\"0eeb770\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span style=\"background-color:#fe5050;color: #ffffff;padding: 5px\">#2<\/span> What exactly does ISO 3601 regulate?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6e1dec5 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"6e1dec5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-87285fe elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"87285fe\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8f73222\" data-id=\"8f73222\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3f77946 elementor-widget elementor-widget-text-editor\" data-id=\"3f77946\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>Section 1: Dimensions and tolerances (ISO 3601-1)<\/b><br \/>1. class A: industry or aviation applications<br \/>2. class B:\u00a0<span style=\"color: #fe5050;\"><a style=\"color: #fe5050;\" href=\"https:\/\/nh-oring.de\/en\/?page_id=23962\" target=\"_blank\" rel=\"noopener\">Classic O-rings<\/a><br \/><\/span><\/p><p><span style=\"color: var( --e-global-color-text ); letter-spacing: 0.1px;\">In the first section you will also find information on size charts. Here are some O-ring dimensions that have been established as a standard by ISO 3601 and are used internationally in applications.<\/span><\/p><p><strong>Section 2<\/strong>: <b>Design and installation spaces (ISO 3601-2)<\/b><br \/>Here you will find all the information and guide values you need for the optimum design of an O-ring.<\/p><p><b>Section 3: Quality acceptance criteria (ISO 3601-3)<\/b><br \/>The quality assessment is also divided into 3 groups:<\/p><p>Class N: Classic O-rings<br \/>Class S: Industrial or aviation applications<br \/>Class CS: Critical industrial or aviation applications<\/p><p><b>Section 4: Back-up rings (ISO 3601-4)<\/b><br \/>Section 4 defines a total of 5 types of back-up rings. You will also find information on the design of support rings.<\/p><p><b>Section 5: Materials (ISO3601-5)<\/b><br \/>Section 5 deals with the various O-ring materials (NBR, EPDM, FKM, etc.). Here, for example, material properties such as compression set, temperature resistance, media resistance and the like are defined.<\/p><p><a style=\"text-decoration-line: underline; color: #fe5050;\" href=\"https:\/\/nh-oring.de\/dichtungsakademie-iso-3601\/\" target=\"_blank\" rel=\"noopener\">Technical article on the ISO 3601 standard | Sealing Academy<\/a><span style=\"color: #fe5050; text-decoration-line: underline;\">\u00a0| Click here &gt;&gt;<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>ISO 3601 standard #1 What is ISO 3601 and why is it so important? ISO 3601 is by far the most important and recognized standard in the world of O-rings. It is the international basis for dimensional tolerances, quality acceptance criteria and size charts. As an illustration: The manufacture and evaluation of O-rings is to &#8230; <a title=\"ISO 3601 | O-Ring Lexicon\" class=\"read-more\" href=\"https:\/\/nh-oring.de\/en\/iso-3601-o-ring-lexicon\/\" aria-label=\"Read more about ISO 3601 | O-Ring Lexicon\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-24666","page","type-page","status-publish"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ISO 3601 standard | Simply explained | The O-RING lexicon<\/title>\n<meta name=\"description\" content=\"ISO 3601 for O-rings explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nh-oring.de\/en\/iso-3601-o-ring-lexicon\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ISO 3601 standard | Simply explained | The O-RING lexicon\" \/>\n<meta property=\"og:description\" content=\"ISO 3601 for O-rings explained simply \u2705 O-ring lexicon \u2705 O-ring technical terms \u2705 The O-ring supplier \u2705 Click here!\" \/>\n<meta property=\"og:url\" content=\"https:\/\/nh-oring.de\/en\/iso-3601-o-ring-lexicon\/\" \/>\n<meta property=\"og:site_name\" content=\"NH O-RING - 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